Pilot screw brakes at narrow point. PILOT SCREW Aplly LOCTITE 638 LIMITER CAP Pilot screw clogged. Carburetor Check Sheet GX120/140/160/200/240/270/340/390 GXV140/160/270/340/390 • Unstable idle speed • Poor performance at low speed Pilot jet clogged. 1 2 3 Remove foreign material/dirt. Replace pilot screw. Remove foreign material/dirt. Remove foreign material/dirt. Pilot jet air path clogged. Main jet clogged. • Engine will not start • Difficult starting • Engine starts but stops quickly Main nozzle clogged. 4 5 6 Remove foreign material/dirt. Remove foreign material/dirt. Set correct idle speed. Throttle stop screw position incorrect. 7 Remove foreign material around float pin. Float doesn’t move properly. • Overflow • Gasoline leak Pilot screw clogged. Pilot jet clogged. Remove foreign material/dirt. Replace pilot screw. Remove foreign material/dirt. Air flow Fuel flow Mixture • Engine speed will not increase • Poor performance at high speed • Unstable engine speed 2 1 Valve seat coated with foreign material/ dirt. Remove foreign material/dirt. Take care not to damage the seat surface. 10 Float valve worn or coated with foreign material/ dirt. Remove foreign material/dirt. 9 Pilot jet air path clogged. Remove foreign material/dirt. 3 Main jet clogged. Remove foreign material/dirt. 4 Main nozzle clogged. Remove foreign material/dirt. 5 Main nozzle air path clogged. Remove foreign material/dirt. 8 For extended storage of the engine (More than 3 months). Drain gasoline from float chamber by running the engine until it stops or by loosening the drain screw while engine is stopped. 11 Pilot screw and limiter cap replacement When the cap is removed, the pilot screw breaks at the neck. To remove the remaining screw, fit an appropriate rubber tube over the remaining stub and unscrew. Install a new pilot screw and set it to the specified position. (Refer to shop manual.) Then install the limiter cap with LOCTITE 638. Using of Carburetor Cleaning Kit (Kit No.07JPZ-0010001) Carburetor cleaning kit for removing foreign material/dirt. Needle A ( ∅ 0.5) (Main jet) Needle B ( ∅ 0.3) (Pilot jet) Pump nozzle (Air blow for jets and air paths) Screw driver (Main jet assemble /disassemble) FUEL COMPRESSION IGNITION COMBUSTION ESSENTIALS Before inspecting the fuel system, perform the minimum inspection for compression and ignition system. 9 4 12 10 1 2 4 8 9 10 Priority check Points : Use needle A (∅ 0.5) to clean Use needle B (∅ 0.3) to clean Use needle A (∅ 0.5) to clean Use needle B (∅ 0.3) to clean 11 8 6 1 2 3 5 7 Float chamber check Water inside float chamber. Take off float chamber and clean or replace. 12 www.honda-engines-eu.com
Honda Gx160 Karburator
Feb 08, 2016
honda
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Transcript
Pilot screw brakes at narrow point.
PILOT SCREW
Aplly LOCTITE 638
LIMITER CAP
Pilot screwclogged.
Carburetor Check Sheet GX120/140/160/200/240/270/340/390GXV140/160/270/340/390
• Unstable idle speed • Poor performance at low speed
Pilot jet clogged.
1
2
3
Remove foreign material/dirt.Replace pilot screw.
Remove foreign material/dirt.
Remove foreign material/dirt.Pilot jet air
path clogged.
Main jet clogged.
• Engine will not start • Diffi cult starting • Engine starts but stops quickly
Main nozzle clogged.
4
5
6
Remove foreign material/dirt.
Remove foreign material/dirt.
Set correct idle speed.Throttle stop
screw position incorrect.
7 Remove foreign material around fl oat pin.
Float doesn’tmove properly.
• Overfl ow • Gasoline leak
Pilot screwclogged.
Pilot jet clogged.
Remove foreign material/dirt.Replace pilot screw.
Remove foreign material/dirt.
Air fl ow Fuel fl ow Mixture
• Engine speed will not increase• Poor performance at high speed • Unstable engine speed
2
1
Valve seat coated with
foreign material/dirt.
Remove foreign material/dirt.Take care not to damage the seat surface.
10
Float valve worn or coated with
foreign material/dirt.
Remove foreign material/dirt.9
Pilot jet air path clogged.
Remove foreign material/dirt.3
Main jet clogged.
Remove foreign material/dirt.4
Main nozzle clogged.
Remove foreign material/dirt.5
Main nozzle airpath clogged.
Remove foreign material/dirt.8
For extended storage of the engine
(More than 3 months).
Drain gasoline from fl oat chamber by running the engine until it stops or by loosening the drain screw while engine is stopped.
11
Pilot screw and limiter cap replacement
When the cap is removed, the pilot screw breaks at the neck. To remove the remaining screw, fi t an appropriate rubber tube over the remaining stub and unscrew.
Install a new pilot screw and set it to the specifi ed position. (Refer to shop manual.) Then install the limiter cap with LOCTITE 638.
Using of Carburetor Cleaning Kit (Kit No.07JPZ-0010001)Carburetor cleaning kit for removing foreign material/dirt.
Needle A (∅ 0.5) (Main jet)
Needle B (∅ 0.3) (Pilot jet)
Pump nozzle(Air blow for jets and air paths)
Screw driver(Main jet assemble
/disassemble)
FUEL
COMPRESSION IGNITION
COMBUSTIONESSENTIALS
Before inspecting the fuel system, perform the minimuminspection for compression and ignition system.
9
4
12
10
1 2 4 8 9 10Priority check Points :
Use needle A (∅ 0.5) to clean
Use needle B (∅ 0.3) to clean
Use needle A (∅ 0.5) to clean
Use needle B (∅ 0.3) to clean
11
8
6
1
2
3
5
7
Float chamber check
Water inside fl oat chamber. Take off fl oat chamber and clean or replace.
12
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