Purpose Introduction - Seaboard Marine Tech Pkg-18SEP13.pdf · Engine Class: Mid-Range ... Euro Stage 3 certification is ... There are no unique installation requirements for the

CUMMINS PROPRIETARY: This information is confidential and classified PROPRIETARY per CORP-10-01-21-03, and shall not be disclosed to others in hard copy or electronic form, reproduced by any means, or used for any purpose without the written consent of Cummins Inc.

Page 1 of 44

Revision 18SEP2013 © Copyright 2013 Cummins Inc.

Subject: QSB6.7 Marine Technical Package

File Name: Complete Engine Assembly MAB No. 0.00.00-11/14/2011

Engine Class: Mid-Range

Engine Model(s): QSB6.7

Creation Date: 14NOV2011 Revision Date: 18SEP2013 Expiration Date: 18SEP2014

Document Owner: Greg Caldwell Page 1 of 44

Purpose

The purpose of this Marine Application Bulletin is to provide the technical information necessary for Certified Application Engineers to apply and install QSB6.7 marine propulsion engines. It will cover the following information:

1. Features and options unique to the QSB6.7 marine engine. 2. Installation instructions and requirements unique to this engine.

Introduction

This MAB will list unique installation requirements that pertain to the QSB6.7 marine engine. A unique installation requirement is defined as a requirement that is new or specific to the QSB6.7 engine. Installation instructions listed in the existing Cummins Recreational and Light Commercial Marine (Cummins RCM) Application and Installation Directions manual and published MAB's also apply to the QSB6.7 engine. Please refer to Table 7 for more information on MAB’s and manuals. The Application and Installation Directions manual is published on the marine.cummins.com website under distributor login. This MAB is designed as a supplement to existing installation directions and product familiarization. Information available in other references is not duplicated here, but is available through attached dynamic links to the appropriate publications. Common technical publications and tools for all marine engines are described in the Installation Technical Publications & Tools MAB (Reference Table 7).

QSB6.7 Marine Technical Package 0.00.00-11/14/2011


Page 2 of 44


Table of Contents Purpose ................................................................................................................ 1

Introduction ........................................................................................................... 1

Summary of Installation Requirements ................................................................. 3

Discussion ............................................................................................................ 3

Engine Ratings & PRIC Specs .......................................................................... 3

Base Price Specs .............................................................................................. 5

Command Power – Uprates and Derates .......................................................... 6

Agency Approvals ............................................................................................. 6

Engine Labeling ................................................................................................. 7

Engine Images ............................................................................................... 7

Comparison QSB5.9 to QSB6.7 ........................................................................ 8

Engine Mounting / Drive Systems ................................................................... 14

Engine Isolation ........................................................................................... 15

Mount Applicability .......................................................................................... 15

Marine Gears................................................................................................... 15

Flywheel and Flywheel Housing ...................................................................... 16

Exhaust System .............................................................................................. 20

Cooling System - General ............................................................................... 21

Heat Exchanger Cooling System ................................................................. 24

Keel Cooled System .................................................................................... 26

Auxiliary Coolers .......................................................................................... 30

Air Intake System ............................................................................................ 31

Engine Room Ventilation ................................................................................. 31

Fuel System .................................................................................................... 31

Electrical / Starting / Charging System ............................................................ 36

Controls and Electronic Features .................................................................... 39

Lubrication System .......................................................................................... 40

Maintenance/Service Space ............................................................................ 42

Engine Performance Test ................................................................................ 42

Installation Review / Sea Trial ......................................................................... 40

Reference ........................................................................................................... 41

Change Log ........................................................................................................ 42

QSB6.7 marine recreational propulsion ratings are certified EPA Tier 3, IMO2 and RCD 2, commercial ratings are certified EPA Tier 3 & IMO2. Euro Stage 3 certification is also available as an option. The EPA ruling on Tier 3 emissions may be found by visiting the EPA website at http://www.epa.gov/otaq/marine.htm It is recommended that the ABYC (American Boat & Yacht Council, Inc) Standards and Technical Information Reports for the applicable engine and engine subsystem sections be followed.

http://www.epa.gov/otaq/marine.htm



Page 3 of 44


These standards and technical information reports complement the mandatory standards promulgated by the United States Coast Guard under the authority of the Federal Boat Safety Act of 1971. For international customers, standards applicable to the engine and engine subsystems outlined by the regional regulatory body should be followed. This MAB will not discuss options and features of the following: SmartCraft Controls and Displays, Aftermarket Control and Display Systems (ACDS) or Zeus pod drive packages. Please refer to Table 7 for more information on these systems.

Summary of Installation Requirements

There are no unique installation requirements for the QSB6.7 engine. Refer to the Cummins RCM Application and Installation Directions manual and Installation Review form for a complete list of installation requirements for Cummins RCM engines. The installation review form can be downloaded from the CARS website http://cars.cummins.com. Several of the boat builder connection points and installation review test points on the QSB6.7 are in different locations and of different configuration compared to the QSB5.9. See the installation package drawings and option graphics for details of each engine connection point.

Discussion

The QSB6.7 engine ratings were released to replace the QSB5.9 commercial and recreational ratings. This MAB will cover unique features for each of the QSB6.7 engine subsystems.

Engine Ratings & PRIC Specs

The Configuration number for the QSB6.7 is D313011MX03. Table 1 below lists the ratings available for the QSB6.7, the product identifier and price specification for each. GS ratings are only available for the QSB6.7 480 and 550 horsepower nodes. Use the appropriate commercial ratings (HD, MD and ID) for government service applications at the other horsepower nodes.

http://cars.cummins.com/



Page 4 of 44


Table 1 - QSB6.7 Product Identifier and Price Spec Matrix

Model Rating Application kW MHP SAE

HP RPM

CPL

No.

Cooling

System

Fuel

Rating

Product

Identifier PRIC #

Software

version

QSB6.7230IDS ID Sterndrive 169 230 227 3000 3887 HX FR94135 MDRV 039 7186 ACDS

QSB6.7230IDI ID Inboard 169 230 227 3000 3887 HX FR94135 MARI 346 7185 ACDS

QSB6.7250HDI HD Inboard 184 250 247 2600 3887 KC FR93962 MARI 340 7048 ACDS

QSB6.7250HOI HO Inboard 184 250 247 2600 3887 HX FR93858 MARI 338 7050 ACDS

QSB6.7305MDI MD Inboard 224 305 301 2600 3887 KC FR93963 MARI 341 7047 ACDS






QSB6.7380HOP HO Zeus NDB Stbd 280 380 375 3000 4191 HX FR94131 MPOD 15 7055 SC 2.5 DTS

QSB6.7380HOP HO Zeus NDB Port 280 380 375 3000 4191 HX FR94131 MPOD 15 7056 SC 2.5 DTS






QSB6.7480GSI GS Inboard 353 480 474 3300 4191 HX FR94128 MARI 335 6847 ACDS




QSB6.7550HOP HO Zeus 28” DB Stbd 404 550 542 3300 4191 HX FR94125 MPOD 17 7114 SC 2.5 DTS

QSB6.7550HOP HO Zeus 28” DB Port 404 550 542 3300 4191 HX FR94125 MPOD 17 7113 SC 2.5 DTS

(Recreational Ratings; EPA Tier 3, IMO Tier II, RCD. Commercial Ratings; EPA Tier 3 and IMO Tier II - Euro Stage 3 optional)

Abbreviations: ACDS ~ Aftermarket Control and Display Systems, SC 2.5 DTS ~ SmartCraft 2.5 Digital Throttle and Shift,

Stbd ~ Starboard, HX ~ Heat Exchanger, KC ~ Keel Cooled



Page 5 of 44


All power ratings measured at a fuel temperature of 104ºF (40ºC). *The GS rating is restricted to non-revenue government service propulsion applications. It is not to be used in any revenue producing commercial applications nor is it to be used in recreational / pleasure applications. Please refer to the GS (Government Service) Rating MAB (Reference Table 7), for a full description of the restricted GS ratings.

Base Price Specs

Table 1 lists the specific product identifiers and their corresponding price specs. Price specs are developed to be minimum content level packages. All PRIC specs are generally setup to have the following common options / features:

Inboard PRIC Walker Super Quiet Air Filter Front Engine Mount – Cradle only No vibration isolators Closed Breather System Front mounted Fuel Filter Front mounted Lube Filter SAE 3 Flywheel and Flywheel Housing Heat Exchanger and Expansion Tank (None for KC ratings) Exhaust Side Oil Level Gauge 12V Electrical System 12V Alternator 12V Starter ACDS, SmartCraft 2.5 DTS for Zeus Sea Water Pump (None for KC ratings) Water in Fuel Sensor and harness Termination resistor for single engine No gear oil cooler No oil or coolant

Zeus PRIC

One Port and one Stbd spec One VesselView DTS control head Three position key switch Customer supplied exhaust Customer supplied driveshaft Shortest harness lengths Front and rear mounts Vibration isolators



Page 6 of 44


Non-Dropbox pod with lowest gear ratio No water inlet connection

Command Power – Uprates and Derates

Ratings in the following groups can be uprated with no mechanical changes:

355, 380, 425

250-KC, 305-KC

230-HX, 250-HX, 305-HX Ratings in the following groups can be derated with no mechanical changes:

355, 380, 425, 480, 550

250-KC, 305-KC

230-HX, 250-HX, 305-HX Uprates to 480 or 550: the 480 and 550 ratings have an additional heat shield at the front of the exhaust manifold. The heat shield (PN 5296562) would have to be added if uprating a lower rating to 480 or 550. Uprates to 550: the 550 ratings have several different components to handle higher torsional loads and increased heat rejection:

Friction shim between crankshaft and flywheel (5294477)

Higher flow sea water pump (5309645)

Larger engine oil cooler (5294201)

Higher pressure oil filter relief valve (5306512) Note: Added to all QSB6.7s in early 2013

Restrictor in hose between exhaust manifold and water inlet (5311248)

These parts are not required for the lower ratings but the lower ratings will function fine with them. It is not necessary to remove these parts if derating from a 550 to a lower rating. Vessel systems compatibility may limit uprates in some installations. Careful analysis of vessel systems like; prop size, prop shaft, ventilation, exhaust, fuel, etc. should be performed before uprating an engine.

Agency Approvals

For recreational engines; EPA Tier 3, IMO Tier II and Recreational Craft Directive (RCD) agency approval options are available. For commercial engines; EPA Tier 3 and IMO Tier II agency approval options are available.



Page 7 of 44


Different options are required for engines above and below 35 Kw per liter. A Euro Stage 3 option is available for commercial engines sold into the European market.

Engine Labeling

One, dependant, engine labeling option is included with recreational QSB6.7 engines. No engine labeling option is necessary or available for commercial or government service engines.

Engine Images

Images of various engine views are provided in Figures 1, 2 & 3 below. Please refer to them when reading the technical package.

Figure 1 - QSB6.7-HX Front, Top and Rear Views

(Note: belt guard removed for clarity)



Page 8 of 44


Figure 2 - QSB6.7-HX Fuel Pump Side and Exhaust Side View

Figure 3 - QSB6.7-KC Fuel Pump Side and Exhaust Side View

Comparison QSB5.9 to QSB6.7

The significant differences between the QSB5.9 and QSB6.7 relating to engine installation are detailed in Table 2. The boat builder should be made aware of these changes well in advance of the first QSB6.7 installation. All of the customer connection points, including mounts and exhaust, are in different locations between the QSB5.9 and QSB6.7. This will drive significant change with any boat model that will transition from QSB5.9 to QSB6.7. A full installation review is required for boats transitioning from QSB5.9 to QSB6.7 and any new installation or repower with QSB6.7 engines.



Page 9 of 44


Table 2 - QSB6.7 to QSB5.9 Dimensional Differences (HX shown)

System QSB6.7 In (mm) QSB5.9 In (mm)

Front Supports 39.6 (1007) Forward of RFFH 33.3 (847) Forward of RFFH

Rear Engine Supports 5.3 (135) Aft of RFFH 6.9 (175) Forward of RFFH

Exhaust Connection 18 (457) Above Crank CL 14.5 (367) Above Crank CL

6.91 (176) Aft of RFOB 9.44 (240) Aft of RFOB

Fuel In Connection 1.61 (40.8) Below Crank CL 13 (330) Above Crank CL

20.6 (523) Aft of FFOB 14 (356) Aft of FFOB

Fuel Out Connection 1.61 (40.8) Below Crank CL 1.67 (42.4) Above Crank CL

18.2 (463) Aft of FFOB 10.4 (264) Aft of FFOB

Battery Connection 13.9 (353) Forward of RFFH 12.4 (315) Forward of RFFH

Engine Height 33.7 (857) 32.1 (814)

Engine Width 35.6 (898) 33.7 (857)

Engine Length 49.8 (1263) 49.9 (1269)

Heat Exchanger Out 2 ( 50.8 ) 1.5 ( 38.1 )

RFFH: Rear Face of Flywheel Housing RFOB: Rear Face of Block FFOB: Front Face of Block Crank CL: Crankshaft Centerline



Page 10 of 44


Table 3 - QSB6.7 vs QSB5.9 Engine Feature Comparison (HX shown)

Component / Feature QSB6.7 QSB5.9

Displacement 6.7 liters (408 in3) 5.9 liters (359 in3)

Bore 107 mm (4.21 in) 102 mm (4.02 in)

Stroke 124 mm (4.88 in) 120 mm (4.72 in)

FW and FWH SAE #3 or SAE #2 SAE #3

Power Cylinder

Piston Single Piece Aluminum Single Piece Aluminum

Piston Cooling Gallery Cooled Gallery Cooled

Cylinder Head / Valve Train

Valves / cylinder 4 (2 intake / 2 exhaust) 4 (2 intake / 2 exhaust)

Tappets Solid Solid

Injector Location Center - Vertical Center - Vertical

Air Handling

Turbocharger

Wastegated (550/480/425/380/355)

Non-wastegated (230/250/305)

Wastegated (550/480/425/380/355)

Non-wastegated (230/305)

Engine Mounting Flexible Flexible

Stud 1” (25.4mm) ¾” (19.1mm)

Lower Adjusting Nut Single Double

Engine Driven Accessories

Crankshaft Belt Drive Yes Yes

Accessory Pulley Belt Drive

Yes Yes

SAE A Pad PTO Yes No

Front crankshaft driveshaft flange

Yes Yes

Ratings with Full Torque Capability at Front of

Crankshaft 250 to 480 mHp Limited on 230-380 mHp

Exhaust System

Turbine cooling Water cooled Water cooled

Exhaust manifold Water cooled

Water cooled

Heat Exchanger Cooling

Sea water cooling Yes Yes

Sea Water Pump Belt driven - High mount Belt driven - High mount

Recovery Bottle None required Required



Page 11 of 44


Table 3 - QSB6.7 vs QSB5.9 Engine Feature Comparison (HX shown) (Cont’d)

Component / Feature QSB6.7 QSB5.9

Air Intake System

Air cleaner type Cleanable Disposable and Cleanable

Breather system Closed Open and Closed

White smoke control Injection timing and

injection shape control Injection timing and injection

shape control

Fuel System

Type Common Rail Common Rail

Alternate Fuel Capability Standard

Yes No

Timing control Yes Yes

Governor Electronic Electronic

Filters Front Mount Front Mount

ECM CM2250 CM850

Starting System 12V / 24V 12V / 24V

Charging System

Case Ground 12V-130A, 12V-160A,

24V-70A 12V-130A, 12V-160A,

24V-70A

Isolated Ground 24V- 80A, 24V-140A,

12V-200A 24V-80A

Controls and Electronic Features

SmartCraft DTS and Non-DTS

SmartCraft DTS and Non-DTS

ACDS Option

Lubrication System

Oil pan Center sump Front, center, or rear sump

Sump capacity 14.2L (15qts) 14.2L (15qts)

Filters Front Mount Front Mount

Figure 4: QSB5.9 vs QSB6.7 (In Green), Height Compare



Page 12 of 44


Figure 5: QSB5.9 vs QSB6.7, Width Compare

Figure 6: QSB5.9 vs QSB6.7, Length Compare



Page 13 of 44


Figure 7: QSB5.9 vs QSB6.7, Length behind Flywheel Housing Compare

Figure 8: QSB6.7 with ZF85A Gear - Foundation Layout



Page 14 of 44


Figure 9: QSB5.9 with ZF85A Gear – Foundation Layout

Engine Mounting / Drive Systems

Six front support options, varying in height from 3.1” (78mm) Below Crank C/L to 1.8” (46 mm) above Crank C/L, are available with the QSB6.7 engine. A customer supplied front mount option is available, which includes only the front support cradle shown in Figure 10 below. The front engine supports and supporting hardware will be fitted on the engine and painted with the engine. The pre-painted (black) isolators will be kitted.

Figure 10: Front Mount Cradle

Marine gear rear support options are available for the QSB6.7 engine when used with ZF 85A, ZF85IV, ZF 280-1A and ZF286A gears. Shipping brackets, and associated cap screws, supplied with the engine, are not to be used as part of the engine mounting system in a vessel.

Customer Supplied Supports Attachment: 8 x

M12 x 1.75 22.8mm Thread Depth



Page 15 of 44


Figure 11: QSB6.7 Vibration Isolator

Engine Isolation

The vibration isolator for the QSB6.7 is a new design with similar isolation characteristics, but better capacity for higher G-loads than the current QSB5.9 isolator.

See MAB 0.16.02-03/11/2003 “Vibration Isolator Installation Instructions” for detailed isolator installation and adjustment procedures.

Mount Applicability

Cummins RCM engine supports and isolators are designed to the specifications defined in Table 4 below. Vessels that may operate in environments where the loads on the engine mounting system exceed those defined in Table 4 should contact a Cummins Marine Applications Engineer for advice on high load mount systems. Examples of crafts that might need higher load capability mount systems are; Race boats, Recreational boats over 65 knots, Military and Government Patrol craft. Vessels that will exceed the Cummins RCM mount load limits should NOT use Cummins supplied supports or isolators.

Table 4 - Maximum G-Loads for Cummins RCM Supplied Mounts

Vertical Up Vertical Down Axial

(Fore/Aft) Horizontal (Left/Right)

6g’s 4g’s 4g’s 2g’s

In addition, vessels with deep reduction marine gears and high propeller shaft thrust loads might exceed isolator design limits. Contact a Cummins Marine Application Engineer for assistance when using deep reduction marine gears with flexible isolators.

Marine Gears

Cummins RCM recommends the use of a flexible mounting system. One vibration isolator option is available for the QSB6.7. The option contains four (4) vibration isolators, nuts, washers and lock nuts. Isolators will be kitted with the engine.

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.16.02-Isolated_Mounting_Components%2FVibration_Isolator_Installation_Instructions&friendlyUrl=%2FProNet%2FApplication+En



Page 16 of 44


Marine Gears Cummins RCM offers ZF marine gears with the QSB6.7. Consult the gear manufacturer’s rating guidelines to ensure proper marine gear selection. Not all gears and ratios are compatible with all ratings. A torsional analysis is required on many new QSB6.7 installations and transitions from QSB5.9 to QSB6.7. Please refer to Marine Torsional Vibration Analysis MAB (Table 7) for complete information.

Flywheel and Flywheel Housing

An SAE #3 flywheel housing is used with the 250 to 550 Hp heat exchanged ratings. An SAE #2 housing is used for 250 and 305 keel cooled ratings.

Engine Driven Accessories Torsional Vibration Analysis (TVA) A TVA is required on most new installations. This is especially important if any direct driven PTOs are utilized. Front Power Take-Off The QSB6.7 engine offers two Front Power Take Off (FPTO) driveshaft adapters which may be used to take power off of the front of the engine. Maximum allowable FPTO capacity is listed on the Engine Performance Curves and Data Sheets

Front PTO loads should be at or below the propeller load curve. For fire boat applications where the propulsor and fire pump are operated simultaneously engines can be loaded above the propeller load curve per instructions in MAB 0.16.05-11/19/2012 “Engine Loading Limits for Fire Pump Applications”. It is recommended that a factory Cummins Marine Application Engineer be consulted when designing a FPTO. See MAB 0.16.05-11/09/2012, Engine Loading Limits for Fire Pump Applications for more information on FPTO requirements.

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.16.05-Power_Take_Offs_and_Clutches%2FEng_Load_Limits_for_Fire_Pump_App&friendlyUrl=%2FProNet%2FApplication+Engineering%252





Page 17 of 44


Figure 12: Front Power Take Off Options

Belt Driven Accessories The QSB6.7 offers a dual groove pulley to be used for belt driven accessories. Maximum side loading for the 250 and 305 ratings are listed in Table 5 below.

Table 5 - Maximum Side Loading. (250 and 305 Ratings only)

Angle 0° 45° 90° 135° 180° 225° 270° 315° Lb-f (N) 59(262) 85(378) 385(1721) 600(2669) 600(2669) 600(2669) 572(2544) 96(427)

Figure 13: Maximum Radial Load at Belt Pulley Center

The 355, 380, 425, 480 and 550 ratings have no front crankshaft side load capacity; therefore, loads applied to the front of the crankshaft would have to offset each other by being applied on opposite sides of the crankshaft or 180° apart.

Pounds Force

Metric Flange SAE 1410 Flange



Page 18 of 44


Figure 14: Opposite Loads on Crankshaft Pulley

Direct Gear Drive PTO The QSB6.7 offers direct, gear drive, PTO options driven off of the lower, front, fuel side of the flywheel housing. An SAE A pad with 9 or 11 tooth splines is available with different mounting bolt configurations to accommodate various pump styles. Pumps attached to the PTO must be Counter Clockwise (CCW) rotation viewed from the pump’s shaft end. Drive ratio is 1:1. Figure 15: Rear Power Take Off Mount Options

Offset Mount Holes In-Line Mount Holes Note: Option graphics for the HD options are displayed under the DR dependent options in GCE.



Page 19 of 44


Power Steering Pump There is no power steering pump option available from Cummins RCM. We have completed fit checks on several hydraulic pumps and found the H Series pump from Parker Hannifin Gear Pump Division a good fit. The H31 AB1FA 135 00 model provides a cost effective 3.15 gallons per 1000rpm pump with built pressure relief of 1350psi. It is not known if other hydraulic pumps will fit and allow hose connections.

Figure 16: Hydraulic Pump Space Claim – Parker H31 Pump Shown in Pink

Mounted to SAE A pad PTO with 3° Mount Hole Offset

Note: There is limited space around the SAE A pad PTO for hydraulic pump attachment and hose routing. Careful 3D modeling should be done prior to final pump selection. Protective Belt Guard

All QSB6.7 engines shipped from Cummins RCM have a corrosion resistant protective belt guard installed. It may be modified to install accessory drives; however the installer is responsible for the modifications to the protective guard. Cummins Recreational and Light Commercial Marine recommends that any moving accessory have a protective guard. Reference ABYC P-4.5.5, which states “All exposed belt drives, chain drives, and rotating parts, as installed, shall be covered with guards or shall be designed in such a way as to prevent injury during the normal operation of the engine. An engine box shall be considered as serving the purpose of this section. Maintenance and engine repairing are not considered normal operation of the engine.”



Page 20 of 44


Exhaust System

All engines subject to EPA Tier 3 emission standards shall be equipped with a connection in the engine exhaust system that is located downstream of the engine and before any point at which the exhaust contacts water (or any other cooling / scrubbing medium) for the temporary attachment of gaseous and / or particulate emission sampling equipment. This connection shall be internally threaded with standard pipe threads of a size not larger than one-half inch, and shall be closed by a pipe-plug when not in use. Reference the QSB6.7 installation drawings for exhaust outlet connection location and dimensions. Reference the QSB6.7 subsystem drawings 4954074 and 4954063 for details about the exhaust outlet mounting flange location and dimension. The exhaust temperature switch option requires a 3/8 in. thick mounting pad to be welded to the water jacketed area on the customer supplied exhaust connection.

Figure 17: Required Pad Dimensions

Wet Exhaust System The recommended minimum diameter on a wet exhaust system is 152 mm (6.0 inches), however a back pressure analysis* must be made to validate minimum pipe diameter for each installation. *A back pressure calculation tool, available in Engine Exhaust System Installation MAB (Table 7), can be used to estimate total system back pressure. Obtain exhaust gas flow and temperature from the Engine Performance Data Sheets. Results must be verified during a sea trial. Dry Exhaust Connection A four inch, ANSI B.16, 150 Class, 8 bolt, vertical outlet dry exhaust is available for the following QSB6.7 ratings; 250mHp HX and KC, 305mHp HX and KC. The option includes the support bracket.



Page 21 of 44


Figure 18: Dry Exhaust Connection

Cooling System - General

Coolant Pre-fill with Cummins Extended Life Compleat Coolant is available as an option. Engines with valve-less cabin heater connections or keel cooling cannot be prefilled with coolant. Cabin Heater The QSB6.7 cooling system can support an auxiliary cabin heating or hot water heating circuit. Pressure rating on auxiliary heater components must be 414 kPa (60 psi) minimum. No more than 5% of the engine water flow may be bypassed through an auxiliary heating circuit. To prevent air from being trapped in the circuit, the highest point in the auxiliary heating circuit must be the de-aerating expansion tank. Loops in the circuit are not permitted. Reference the QSB6.7 installation drawings for coolant supply and return connection locations. The cabin heater option without valves contains a coolant flow restrictor (orifice) to limit bypass flow through the auxiliary heating circuit. The cabin heater option with shut off valves in the connections is used to isolate the auxiliary heating circuit. The shut off valve passage size serves as an orifice for restricting coolant flow. The cabin heater option without valves cannot be ordered in conjunction with engine coolant option. Customers need to fill the engine with coolant at their local facility. The KC cabin heater option is kitted.



Page 22 of 44


The auxiliary heater supply connection, for all engine arrangements, is on the exhaust manifold side of the engine block located near the engine lube cooler. The threads of the supply port are M18 x 1.5 STORM. The auxiliary heater return connection is on the water inlet connection to the engine. The return connection threads are ¾-14 NPTF for the HX arrangement and KC small alternator. Inlet and outlet adaptors provide a 5/8” push on, barbed, connection.

Figure 19: HX Cabin Heater and Block Heater Connections

Figure 20: KC Cabin Heater Connections

(Small Alternator Version Shown)

Block Heater

Cabin Heater Supply

Cabin Heater Return

Block Heater

Cabin Heater Supply (M18 x 1.5 STORM)

Cabin Heater Return (3/4” NPT)



Page 23 of 44


Figure 21: KC Cabin Heater Return Connection (Large Alternator Version Shown)

For the KC, large alternator arrangement, the return connection is 1 1/16” – 12 STOR, in the water inlet connection (see Figure 21 above). Only cabin heater supply connections are provided in this HC option, return fittings are NOT provided. The boat builder will need to provide a 1 1/16” – 12 STOR to ¾” NPT adaptor fitting (Parker 12-¾ F50G or equivalent) and a ¾” NPT to ⅝” hose barb adaptor fitting (Cummins 3912977 or equivalent) to make cabin heater connection. Block Heater The QSB6.7 has an available 120V/750W block heater option. Order the Customer Supplied block heater option if no block heater is required. The block heater can be ordered and installed with the cabin heater option. Coolant Level Sensor The QSB6.7 coolant level sensor comes pre-installed on the engine mounted expansion tank on heat exchanger equipped engines.

Figure 22: HX QSB6.7 Coolant Level Sensor Location



Page 24 of 44


Note: It is recommended that the fill cap be removed and the coolant level in the engine be checked after initial start up and warm up to ensure complete engine fill due to initial de-aeration. Wait until the engine has cooled before removing the pressure cap. For keel cooled engines, the coolant level sensor and sensor extension harness must be ordered as a separate SD option. They will be kitted.

Heat Exchanger Cooling System

Heat Exchanger There are two HX options for the QSB6.7. One for the small frame Delco and Prestolite MDA alternators, the other is for the large frame Prestolite BLD and BLP alternators. Sea Water Pump Two standard sea water pump options are available for QSB6.7 ratings below 500Hp; one with a 45° inlet and one with a 90° inlet. The high output sea water pump for the 550Hp rating is only available with a 45° inlet. The sea water pump is belt driven and mounted high, on the fuel pump side of the engine. Please refer to Sea Water Pump Performance MAB (Table 7), to obtain sea water pump performance information. The 550Hp ratings use a high flow sea water pump to handle the higher heat rejection of these ratings. The high flow pump uses a higher lift, bolt in cam to increase flow approximately 5-6 gpm at rated speed. The bolt in cam is the only difference between the two pumps. Dry Run Sea Water Pump A sea water pump has been released for applications that demand running the engines for a short period of time without sea water supply. Due to the innovative design of the inlet and outlet piping on this pump, the dry-run pump can run without normal sea water supply for up to 30 minutes, at idle speeds. An initial water fill through the top plug on the discharge pipe is required for this pump to work effectively in dry run conditions. The dry run pump can be run dry at engine nose up angles up to 25 degrees.



Page 25 of 44


Figure 23: QSB6.7 Dry Run Sea Water Pump

Auxiliary Pump Mount Four M8 x 1 bolt holes are provided on the top of the sea water pump bracket to mount auxiliary pumps, typically used for Freon compressors. See the “QSB6.7 Freon Compressor Drive” MAB No. 0.09.01-5/20/2013 for details on the new Freon compressor drive.

Figure 24: QSB6.7 Auxiliary Pump Mounting

Heat Exchanger and Expansion Tank The QSB6.7 heat exchanger is a shell and tube type, mounted outboard of the exhaust manifold with the de-aerating expansion tank (see Figure 2) side mounted above the manifold and heat exchanger. No coolant recovery bottle is required or available with the QSB6.7. The expansion tank is sized to eliminate the need for a coolant recovery bottle. Remote HX Expansion Tank Mounting Some applications may require remote mounting of the heat exchanger expansion tank. See the “Remote Coolant Expansion Tank for QSB6.7 HX Applications” MAB No. 0.08.00-05/21/2013 for details.

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.09.01-Belt_Driven_Accessories%2FFreon_Comp_Install_Details_Engine_Harness_Loc&friendlyUrl=%2FProNet%2FApplication+Engine

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.08.00-Cooling_System%2FRemote_Coolant_Exp_Tank_for_QSB6_7_HX_App&friendlyUrl=%2FProNet%2FApplication+Engineering%2FMarin




Page 26 of 44


Keel Cooled System

The QSB6.7 can be ordered as a single loop, Keel Cooled (KC) engine, utilizing low temperature aftercooling. When ordering the QSB6.7 with a keel cooler it is important to note that there are several differences between a keel cooled configuration and a heat exchanged configuration.

Modifications to the engine mounted KC plumbing are not approved.

A sea water pump will not be provided.

The expansion tank that is offered with the engine is larger than with the HX configuration and is to be remotely mounted.

The thermostat on a KC engine is mounted under the water out connection in the same location as the HX engine

The keel cooler supply connection (engine water out) is located at the engine water out connection located at the front, top of the cylinder head. The keel cooler return connection point is located at the water inlet to the charge air cooler. Both connections are for 2”ID hose.

Auxiliary coolers are approved only in the engine supply line from the keel cooler. There will be little flow through the cooler when the engine is cold, since the thermostat will bypass most of the water during cold engine operation.

Keel Cooler Operation Figure 25 shows the fluid flow of the keel cooled system. Modifications to the engine cooling circuit are not allowed. The performance of the cooling circuit is dependent on the pressure balance of the entire cooling circuit. Modifications to the circuit could negatively impact the cooling system performance. THERMOSTAT CLOSED: The thermostat is closed when the engine coolant is cold. All coolant flows directly to the aftercooler and bypasses the keel cooler and any non-CMD auxiliary coolers. THERMOSTAT OPEN: The thermostat begins to open as the engine coolant temperature increases above 71°C (160°F). Coolant is directed through the keel cooler and is returned back to the after cooler.



Page 27 of 44


Figure 25: QSB6.7 Single Loop Keel Cooled Coolant Flow Diagram

Keel Cooler Customer Connections There are two 2-inch hose connections provided to connect to the keel cooler circuit. It is recommended that 2 in. (50.8 mm) I.D. hoses with double stainless steel hose clamps be used at all hose connections. This will provide the necessary flexible connection between the engine and shipboard piping.

Figure 26: Keel Cooler Connection Points

Keel Cooler Installation Considerations There are no new installation requirements for the single loop keel cooled system. However, there are concerns that need to be addressed:

Keel Cooler OUT

Engine IN

Keel Cooler IN

Engine OUT



Page 28 of 44


The keel cooler will have to handle a lower flow rate and a higher heat rejection than older non-Tier 2 or 3 engines, which will increase the size of the keel cooler. Repower installations will require an additional or a larger keel cooler. The keel cooler channel may require smaller cross sectional areas to maintain adequate coolant velocity. Refer to the Performance Data Sheet for heat rejection and cooling system specifications.

Please refer to the Keel Cooler Sizing Calculator MAB to provide a conservative estimate for keel cooler design.

A manufactured keel cooler may be more effective where space is limited. These are usually smaller and more efficient than fabricated keel coolers. The keel cooler manufacturer must be consulted for proper sizing.

The coolant inlet temperature from the keel cooler must be less than the value listed on the Performance Data Sheet.

Maximum pressure drop across the external cooling system circuit can be found on the General Engine Data Sheet. A 1/8” NPT test port is provide in the water-out connection. A ½” NPT port is provided in the rear cover of the charge air cooler for water in. Do not use the ½” NPT port at the front of the charge air cooler as this will give a false reading.

Figure 27: Keel Cooler Pressure Test Ports

From Keel Cooler To Keel Cooler (1/8” NPTF) (1/8” NPT-Cust Supplied)



Page 29 of 44


Expansion Tank The expansion tank supplied by Cummins RCM or a customer supplied tank must be remotely mounted and meet all installation requirements specified in the Commercial Installation Directions Bulletin No. 3884744. There is no engine mounted expansion tank available for keel cooled QSB6.7 engines. Proper system pressure is critical to the operation of the keel cooled cooling system. A 15 psi pressure cap must be installed on expansion tanks mounted up to 1.5 m (5ft) above the engine. The pressure cap rating must be reduced for mounting heights above 1.5 m (5 ft). Refer to Bulletin 3884744 for recommended cap ratings versus tank mounting heights. Vent line connections Vent lines for a KC engine must be routed in accordance with the installation requirements for the cooling system as given in the Commercial Installation Directions Bulletin No. 3884744. There are four coolant vent lines required for keel cooled QSB6.7 engines:

Top of the turbo charger turbine housing

Top of the water outlet connection

Top, front of the exhaust manifold

Top, front, exhaust side of the cylinder head All four connection points are #4 SAE flare, male.

Figure 28: Vent Line Connection Points for Keel Cooled Engines

Water Outlet

Vent Port

Exhaust Manifold

Vent Port

Cylinder Head

Vent Port



Page 30 of 44


Figure 29: Turbo Vent Line Connection Point for Keel Cooled Engines

Auxiliary Coolers

Marine Gear Oil Cooler Several marine gear oil cooler options are offered. ZF85A and ZF85IV gears require the pressure and temperature sensors to be installed in the gear. Most other gears require sensors mounted in the cooler. Contact the gear supplier for proper sensor locations. Options available with pressure and temperature sensors offer the capability to monitor marine gear oil pressure and temperature. With SmartCraft applications, the sensor signals are monitored by the System Integration Module (SIM), not the ECM module. The gear oil temperature sensor has a visual and/or audible alarm set point. The gear oil pressure sensor does not have alarm capability with SmartCraft. The oil hoses and fittings connecting the marine gear to the cooler will automatically be installed when a marine gear option is selected. If a customer supplied gear option is selected, the cooler hoses and fittings need to be sourced with the marine gear. A ¼” NPT female connection in the gear coolers and a ¾” NPT female connection in one of the ”no gear cooler” option tubes is provided for supplying sea water to the propeller shaft seal. Other Auxiliary Coolers If an additional auxiliary cooler is required for a heat exchanged QSB6.7, it may be installed on the suction or discharge side of the engine sea water system. The modified sea water circuit must continue to operate within the published sea water inlet restriction and sea water pump discharge pressure limits found on the General Engine Data Sheet.

Turbocharger

Vent Port



Page 31 of 44


Air Intake System

All QSB6.7 marine engine ratings are available with an engine mounted air intake system supplied with a cleanable, super quiet air filter. The 250 and 305 ratings are also available with a remote mount filter option which includes a disposable air filter and turbo inlet adapter with restriction indicator, crankcase breather connection and air inlet temperature/barometric pressure sensor. Turbocharger arrangement There are two different turbo arrangement options for the 230-305 ratings, depending on alternator size. For the 355-550 ratings there are four different turbo arrangement options determined by alternator size and marine gear size; two for deep case marine gears and two for shallow case gears.

Engine Room Ventilation

Refer to Engine Room Ventilation MAB (Table 7), for information on how to properly size engine room vents for adequate ventilation. Reference the specific QSB6.7 Engine Performance Data Sheet to find combustion air flow and ambient heat rejection. Maximum air filter inlet temperature is 54°C (130°F). Maximum delta T between ambient and air inlet temperature is 17°C (30°F). Maximum operating engine room temperature is 66°C (150° F) for remote mounted air filters.

Fuel System

Alternate Fuels Capability The QSB6.7 high pressure, common rail, fuel system was designed to work with various types of alternative fuels, including; JP8, Biodiesel, Kerosene, and JP5 without addition of fuel lubricity enhancers. Several internal high pressure pump components were hardened and improved to allow this capability. Fuel System Operation System priming; the electric priming pump will run for approximately 30 seconds after key-on, then shut off. The priming pump is mounted to the engine on the fuel connection manifold.



Page 32 of 44


See the First Engine Start section below for engine starting after changing filters. Note: the secondary fuel filter, installed after the gear pump on the QSB6.7, is under gear pump pressure, whereas the QSB5.9 secondary fuel filter was installed before the gear pump and is in suction.

Figure 30: QSB6.7 HPCR Fuel System

Fuel Supply Connection The QSB6.7 fuel supply connection is located on the fuel pump side of the engine on the fuel connection manifold. The fuel supply connection size is a #10 Straight Thread O-Ring (STOR), 7/8-14 UNF. Figure 31 shows the fuel supply connection on the engine. Fuel Return Connection The QSB6.7 fuel drain connection is located on the fuel pump side of the engine on the fuel connection manifold. The fuel return connection size is a #8 Straight Thread O-Ring (STOR), 3/4-16 UNF. Figure 31 shows the fuel drain connection on the engine. Fuel Pressure Test Ports Diagnostic pressure ports (M10 x 1 STORM), as shown in Figure 31, are to be used for fuel supply and drain line restriction measurements.



Page 33 of 44


Due to tight access to the fuel pressure diagnostic test ports, it is recommended that 90° adaptor fittings be installed in the M10 x 1 STORM test ports to facilitate installation of pressure test equipment. M10 x 1 STORM ninety degree adaptor fittings can be procured locally. Ninety degree CompuCheck fittings are available from Cummins parts, PN 5298548.

Figure 31: QSB6.7 Fuel Connections

Fuel Adaptor Fittings Ninety degree fuel adaptor fittings, 3/8” Push On and #8-37° Flare, are available to connect with readily available aftermarket fuel lines. Electric Fuel Transfer Pump An electric fuel transfer/priming pump is standard on all QSB6.7 engines. Both 12V and 24V versions are available. The fuel transfer pump is a dependent option, therefore does not need to be added to engine specs. The pump is mounted onto the fuel connection manifold for easy service access. The transfer pump is energized by the ECM for approximately 30 seconds, each time the ignition is cycled ON. Water in Fuel Sensor (WIF) A Water In Fuel (WIF) sensor must be used with the QSB6.7 engine. For engines with dual primary filter arrangements, each filter requires a WIF sensor. Cummins RCM offers several WIF sensor options that can be ordered with the engine.

Diagnostic Test Ports

Fuel Inlet Connection

Fuel Drain Connection



Page 34 of 44


The WIF sensors supplied by Cummins RCM are compatible with Racor 900 and 1000 MA filters or with Separ SWK 2000 filters. Compatibility with other models or manufacturer’s filters is unknown. Compatibility with other manufacturer’s supplied WIF sensors is unknown.

A fault message will be displayed if water is detected, if the WIF sensor is not connected to the engine, or a diagnostic fault is detected by the ECM. A 4.9 m (16 feet) harness is provided to connect from the WIF sensors to the engine. For SmartCraft version 2.5, the WIF connector is on the Vessel Sensor harness. This harness has mating connectors for two WIF sensors. If only one WIF sensor is used, then a terminating resistor must be installed in the unused connector. The installer will be required to make the connection between the WIF sensor and the engine harness connector pigtails. For systems with Aftermarket Control and Display Systems the WIF connection is made on pins 38 and 39 on the engine 40 pin connector. See the “Boat Builder Electrical Interface for QSB6.7 Engines” MAB-0.13.00-01/17/2013 for details. (See Table 7 below) Primary Fuel/Water Separator A primary fuel/water separator is required between the engine and the fuel tank. The primary fuel/water separator and WIF sensor assembly must meet Coast Guard requirements. Cummins RCM recommends using the largest primary fuel/water separator possible. By using the largest primary fuel/water separator possible, the dirt holding capacity of the filter is typically increased. The micron rating for high pressure common rail fuel systems is 10 micron vs. 30 micron for other fuel systems. Use of a smaller fuel filter that only meets the minimum fuel inlet restriction requirements, to save on costs, may end up frustrating customers due to shorter service intervals than they are used to. Primary Fuel/Water Separator Specifications:

10 micron filter rating.

Separator must have a 36 gram minimum capacity per SAE J1905.

98.7% efficiency using ISO A2 test dust per SAE J1985 test methods.

Filter must remove 95% (or more) coarse water droplets over the life of the filter, per SAE1488.

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.13.00-Electrical_System%2FBoat_Builder_Elec_Interface_for_QSB6_7_Eng&friendlyUrl=%2FProNet%2FApplication+Engineering%2FM




Page 35 of 44


Secondary Fuel Filter A front mounted, 3 micron, fuel filter is available on the QSB6.7. The fuel filter has a cast fuel and lube filter bracket, supply/return hose and tube assemblies. This option is standard for all QSB6.7 ratings.

Figure 32: Lube and Fuel Filter

Fuel Cooler Fuel coolers are required on all GS ratings and on applications which could use alternate fuels. Alternate fuels include, but are not limited to; JP8, JP5, Kerosene and biodiesel. These fuels typically have lower flash points than No.2 diesel and often have insufficient lubricity at higher temperatures to maintain adequate fuel pump service life. The fuel cooler should be vessel mounted with plumbing supplied by the boat builder. The cooler is designed to cause little to no increase in water inlet restriction. Typically the fuel cooler is located in the raw water supply circuit. Fuel drain lines should be connected to the fuel cooler such that fuel flow is opposite that of the raw water flow. Raw water connections are 2” (50.8mm) OD hose bead. Fuel connections are SAE #6 O-Ring Face Seal (ORFS), 11/16-16 thread.

Figure 33: Fuel Cooler



Page 36 of 44


First Engine Start The secondary fuel filter, when installed dry, will take 3-4 key switch ON cycles to fill (see steps below). It is recommended that the primary or suction side filter be pre-filled to aid engine starting, or additional key switch on cycles may be required. Step 1: Key on without cranking Step 2: Wait 30 seconds Step 3: Key off Step 4: Repeat steps 1, 2 and 3 five times Step 5: Crank engine. If engine does not start within 30 seconds (10 seconds for

SmartCraft), key off to allow the starter to cool for a minimum of two minutes and repeat steps 1 – 4.

Electrical / Starting / Charging System

Electrical System The QSB6.7 may be ordered with either 12V or 24V systems. Starting System The QSB6.7 is available with 12V or 24V, isolated or non-isolated ground starters. The starters are located on the exhaust side of the engine under the turbocharger. Both the 12V and 24V isolated ground starters come with an attached “Soft Start” magnetic switch which needs to be used in conjunction with the start system magnetic switch attached to the side of the engine.

Figure 34: Isolated Ground Starter

“Soft Start” Magnetic Switch



Page 37 of 44


Charging System The QSB6.7 offers 12V and 24V, non- isolated and isolated alternators. In the case of 3-wire, remote voltage sense alternators, a jumper wire is included between the remote sense terminal and the B+ terminal that allows a 3-wire alternator to work as a single wire alternator. Charging System Wiring Information on how to wire the new High Output Alternators can be found in the “High Output Alternator” MAB No. 0.13.00-5/21/2013. Alternator Wire Sizing For 12V130A, 12V160A, 24V70A and 24V80A alternators; the Remote Sense wire should be 18 gauge or larger. For 12V200A and 24V140A alternators; the Remote Sense, TxRx and Lamp Drive wires should be 16 gauge or larger. For all alternators; the Battery + and Battery – wires should be sized to meet resistance guidelines defined in the RCM Installation Directions manual for necessary wire lengths. Customer Supplied Alternator If the alternator is not supplied by Cummins Recreational and Light Commercial Marine, or if the alternator or its mounting is modified by the customer, Cummins RCM is not responsible for problems associated with an improperly installed alternator. If the customer wishes to supply their own alternator, it must be properly installed. Factors that should be considered with the installation of an alternator are, but not limited to; mounting, wiring, belt wrap, belt tension, alignment, amperage, vibration, cooling, and belt guard fit. Failure to properly install the alternator can result in engine damage. Alternator Wiring Harness Alternator wiring harness options are available on the QSB6.7 engine. This option is used to connect the positive and ground terminals between the alternator and starter.

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.13.00-Electrical_System%2FHigh_Output_Alternators&friendlyUrl=%2FProNet%2FApplication+Engineering%2FMarine+Application+B



Page 38 of 44


Grounding System

Any accessory negative terminals must be connected directly to the negative terminal on the starter, not to the cylinder block.

The starter negative terminal must be connected directly to the battery negative terminal.

The alternator negative terminal must be connected directly to the battery negative terminal or the starter negative terminal.

Isolated Ground Systems Isolated ground starters and alternators are available with the QSB6.7. Isolated ground systems will have the ground strap from the starter negative terminal to the block and the ground strap from the ECM case to the block removed to create a completely isolated system for the QSB6.7. The QSB5.9 engine could achieve only ~5KΩ isolation. Engine Electronics There are several engine parameters that are monitored with electrical sensors. The primary ones are as follows:

Oil Pressure Coolant Temperature Intake Manifold Temperature Engine Speed (rpm) Fuel Rail Pressure Intake Manifold Pressure (Boost) Air Filter Intake Air Temperature Barometric Pressure Crankcase Pressure

There are two optional electrical sensors for marine gear oil temperature and oil pressure. For Smart-Craft applications the gear oil temperature sensor has a visual and audible alarm. The gear oil pressure sensor does not have alarm capability within SmartCraft. ECM The QSB6.7 uses the CM2250 Engine Control Module (ECM). The ECM is mounted on the fuel pump side, near the front of the engine. ECM Wiring The ECM power cables should be connected directly to the engine battery or to a bus bar to maintain maximum voltage for the ECM during cranking.



Page 39 of 44


If ECM voltage falls too low during cranking, ECM resets will occur, resulting in long crank times. The ECM power cables must have proper over current protection. One ATO type circuit breaker is recommended for the power input. Reference American Boat and Yacht Council (ABYC) section E-11 for locating the ECM power protection relative to the power source. On all engines, a 4-pin Deutsch style connector is located on the ECM mounting plate. It is recommended that the Cummins supplied power cable is used to supply power to the ECM from the battery.

Figure 35: SmartCraft 2.5 ECM Power Cable Connection

Engine Voltage The QSB6.7 engine is available in 12V and 24V versions.

Controls and Electronic Features

This MAB will not go into the details of the SmartCraft system features and options available with the QSB6.7. For complete information on SmartCraft, please refer to documents listed in Table 7. For ACDS interface instructions see Table 7 For J1939 interface instructions see Table 7



Page 40 of 44


Figure 36: Additional Customer Connections on Engine Harness

Lubrication System

Oil Pan A low profile, cast Aluminum, center sump oil pan, is the only pan available for the QSB6.7. The oil pan offers a port for an oil pan heater (M22 x 1.5) as well as handed drains (M18 x 1.5). Reference the installation drawing for oil pan drain location, port thread type, and required removal clearance. IMPORTANT NOTE: Do not set the engine on its’ oil pan. This can cause oil pan gasket failures and oil leaks. Customer can choose to order the engine with or without lubricating oil. Engine Oil Cooler The QSB6.7 230 to 480 ratings have an eight plate engine oil cooler. The QSB6.7 550 rating has a nine plate engine oil cooler to handle the higher heat loads of the 550Hp rating. Oil Level Gauge Two side mounted as well as one top mounted oil gauge options are available for the QSB6.7. The oil level gauges are pre-marked with the high and low levels.

Back-Up/Remote Throttle Input

MUS ID Jumper

Tachometer Output

J1939 Datalink Connection: Termination Resistor Cap

Shown Installed



Page 41 of 44


Oil Pump Out Two engine oil remote drain connections are available, one on the fuel side the other on the exhaust side. Both have hoses with ½” NPT connections. Remote oil pump outs are available for factory supplied marine gears. If no remote drain option is chosen for the engine, the oil pan is provided with three, plugged, oil drain ports; two on each side of the pan at the rear and one in the center of the pan at the front. All three drain ports are M18 x 1.5 threads. Oil Sump Pump A manual oil sump pump is offered with the QSB6.7. It must be vessel mounted with connection hose and adapter fittings provided by the boat builder. The oil pan connection thread is M18 x 1.5 STORM. An oil pan adaptor fitting is available as a Cummins part (4079171 - 90 deg M18 to #8 37 Flare). The hand pump connection thread is 1/4-19 BSPP internal thread. An adaptor fitting is available from Parker Hannifin ("8-4F4OMX" - 1/4-19 BSPP to #8 37 deg flare). Engine oil should not be ordered when this option is selected.

Figure 37: Manual Oil Sump Pump

Lubricating oil filters The QSB6.7 engine comes with a front mounted lubricating oil filter. Please refer to Figure 32 for mounting location.

Note: Vessel

Attachment Bolts

Not Provided



Page 42 of 44


Oil Pan Heater A 120V – 150W oil pan heater is available for the QSB6.7 engine which comes with a 1829mm (6’) electric cord with a 120V20A, three prong, plug. For customer provided oil pan heaters, a M22 x 1.5 port is provided in the oil pan.

Maintenance/Service Space

Maintenance item space requirements can be found on the applicable engine installation drawings. Easy access to maintenance items is a requirement. Leaving adequate service space around the engine is encouraged but not a requirement.

Table 6: Service Space

Location Optimal Minimum

Front 356mm (14") 152mm (6")

Top 635mm (25") 254mm (10")

Side 635mm (25") 254mm (10")

Rear 635mm (25") 254mm (10")

Bottom 533mm (21") 305mm (12")

Engine Performance Test

Two performance tests on the engine are available as an option. One is a 10 minute test the other is a 1 hour, full load test. This is done at the plant prior to the engine shipment and the test document would be shipped along with the engine. RCM recommends including a full load test for military applications and other horse power sensitive applications.

Installation Review / Sea Trial

Sea Trial Tools: Either INSITE or Calterm electronic tools must be utilized for all sea trial and troubleshooting data acquisition and recording. Reference the Installation Review Reports MAB (Table 7) for information on installation reviews and installation review reports.



Page 43 of 44


Installation Review and Sea Trial Comments All installation reviews and sea trials should be processed through the installation review database (CARS).

Reference Please refer to Table 7 for more information on QSB6.7 products and relevant systems.

Table 7: Reference Documentation for QSB6.7 Engine Package

Installation Directions and Tools Reference Number CMD Application and Installation Directions Manual 4082075

Installation Technical Publications and Tools MAB No. 4.00.00-11/01/2005

Installation Review Reports MAB No. 3.00.00-01/17/2001

Installation review report form –

Recreational/Commercial/Packaged product cars.cummins.com

GS (Government Service) Rating MAB No. 2.05.00-03/23/2004

Marine Application Engineering Software MAB No. 4.00.00-05/08/2000

Marine Torsional Vibration Analysis Information MAB No. 2.03.00-03/23/2000

Electronic Throttle Interface MAB No. 0.19.06-07/31/2001

High Output Alternators MAB No. 0.13.00-5/21/2013

Engine Exhaust System Installation MAB No. 0.11.00-04/15/2003

Sea Water Pump Performance MAB No. 0.08.17-07/16/2001

Sea Water Inlet Restriction Tool MAB No. 0.14.02-01/27/2005

Engine Air Intake System MAB No.0.10.00-07/17/2000

Engine Room Ventilation MAB No. 0.23.00-03/28/2001

QSB6.7 Freon Compressor Drive MAB No. 0.09.01-5/20/2013

J1939 Digital Interface for QSB6.7 Engines

MAB No. 0.19.00-10/08/2012

Boat Builder Electrical Interface for QSB6.7 Engines

MAB No. 0.13.00-1/17/2013

Engine Loading Limits for Fire Pump Applications

MAB No. 0.16.05-11/19/2012

Remote Coolant Expansion Tank for QSB6.7 HX

Applications MAB No. 0.08.00-05/21/2013

SmartCraft 2.5 Non-DTS SmartCraft 2.5 Option Overview Diagram 4304665

DTS SmartCraft 2.5 Option Overview Diagram 4304664

SmartCraft 2.5 Electrical System Architecture MAB No. 0.13.00-11/23/2011

Zeus Pod Drive

Zeus SmartCraft 2.5 Option Overview diagram 4304663

Zeus Pod Drive Technical Package – Gen2 MAB No. 1.01.00-10/26/2009

Zeus QSB Exhaust System MAB No. 0.11.00-07/28/2008

Zeus Customer Supplied Exhaust Requirements MAB No. 0.11.00-10/02/2008

Zeus Customer Supplied Driveshaft Requirements MAB No. 1.03.03-10/02/2008

https://gce.cummins.com/mce/mce_cmd/Applications/application%20and%20installation%20manuals.htm?lang=EN&cntry=US

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F4.00.00-General_Product_Information_and_Announcements%2FInstallation_Tech_Pub_and_Tools&friendlyUrl=%2FProNet%2FApplicatio

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F3.00.00-Cummins_Marine_Policies_and_Procedures%2FInstallation_Review_Reports&friendlyUrl=%2FProNet%2FApplication+Engineeri

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F2.05.00-Engine_Ratings_and_Duty_Cycle%2FGS-Government_Service_Rating&friendlyUrl=%2FProNet%2FApplication+Engineering%2FMar

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F4.00.00-General_Product_Information_and_Announcements%2FMarine_Application_Engineering_Software&friendlyUrl=%2FProNet%2FAp

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F2.03.00-Noise_and_Vibration%2FMarine_Torsional_Vibration_Analysis_Information&friendlyUrl=%2FProNet%2FApplication+Engineer

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.19.06-Electronic_Throttles%2FElectronic_Throttle_Interface&friendlyUrl=%2FProNet%2FApplication+Engineering%2FMarine+Appl

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.13.00-Electrical_System%2FHigh_Output_Alternators&friendlyUrl=%2FProNet%2FApplication+Engineering%2FMarine+Application+B

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.11.00-Exhaust_System%2FEngine_Exhaust_System_Installation&friendlyUrl=%2FProNet%2FApplication+Engineering%2FMarine+Appli

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=$/templatedata$/MarineContent$/MAB$/data$/en$/Active_MABs$/0.08.17-Sea_Water_Pumps$/Sea_Water_Pump_Performance&friendlyUrl=$/ProNet$/Application$$%20Engineering$/Marine$$%20Application$$%252

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.14.02-Sea_Trial_Tests_and_Equipment%2FSea_Water_Inlet_Restriction_Tool&friendlyUrl=%2FProNet%2FApplication+Engineering%252

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.10.00-Air_Intake_System%2FEngine_Air_Intake_System&friendlyUrl=%2FProNet%2FApplication+Engineering%2FMarine+Application+

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.23.00-Engine_Room_Ventilation%2FEngine_Room_Ventilation&friendlyUrl=%2FProNet%2FApplication+Engineering%2FMarine+Applica

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.09.01-Belt_Driven_Accessories%2FFreon_Comp_Install_Details_Engine_Harness_Loc&friendlyUrl=%2FProNet%2FApplication+Engine

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.19.00-Electronic_Engine_Controls%2FJ1939_Digital_Interface_for_QSB6_7_Engines&friendlyUrl=%2FProNet%2FApplication+Engine




https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.13.00-Electrical_System%2FSmartCraft_2.5_Elec_Sys_Architecture&friendlyUrl=%2FProNet%2FApplication+Engineering%2FMarine+




https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F1.01.00-Propulsion_Devices%2FZeus_Pod_Tech_Pack_Titan_06Jun12&friendlyUrl=%2FProNet%2FApplication+Engineering%2FMarine+App

https://marine.cummins.com/marine/fetchArchiveMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FMAB_Archive%2F0.11.00-Exhaust_System%2FZeus_QSB_Exhaust_System&friendlyUrl=%2FProNet%2FApplication+Engineering%2FMAB+Archive

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F0.11.00-Exhaust_System%2FZeus_Customer-Supplied_Exhaust_Requirements&friendlyUrl=%2FProNet%2FApplication+Engineering%2FMar

https://marine.cummins.com/marine/fetchMabContent.action?mabDcrPath=%2Ftemplatedata%2FMarineContent%2FMAB%2Fdata%2Fen%2FActive_MABs%2F1.03.03-Driveshafts_Bearings_Joints_and_Shaft_Brakes%2FZeus_Customer_Supplied_Driveshaft_Requirements&friendlyUrl=%2FProNe



Page 44 of 44


Change Log

Date Change Page Revising

Author’s Name 1/31/2012 Add remaining Ph1 Options and PRIC 4 & 5 Greg Caldwell

4/11/2012 Revise ratings and PRIC specs. Remove E-config 1 & 4 Greg Caldwell

9/22/2012 Add Ph 2/3 Options All Greg Caldwell

10/9/2012 Remove most option numbers, Add Tier 3 All Greg Caldwell

11/02/2012 Prepared and published to the Web CS/DDJ

11/12/2012 Add Tier 3 PRICS, Add heat shield uprate info 4,6 Greg Caldwell

2/26/2013

Updated hyperlink, page numbers, republished to the webAdd KC HC option, turbo arrangement and PTO loading info. Add PRIC specs. Add MABs to Reference.

4, 16, 23, 31,

45 Greg Caldwell

8/16/2013

Changed 355ID PRIC to 2013, Added section on remote HX expansion tank, Moved Freon compressor drive info to new MAB, Moved high output alternator info to new MAB,

4, 26, 27, 36,

Greg Caldwell

9/11/2013 Change CPL from 3164 to 4191 4 Greg Caldwell

09/18/2013 Added hyperlinks, header, footer and republished to the web

CS

Purpose Introduction - Seaboard Marine Tech Pkg-18SEP13.pdf · Engine Class: Mid-Range ... Euro Stage 3 certification is ... There are no unique installation requirements for the

Documents