1 ADVANCE PRODUCT SERVICE INFORMATION SUBJECT: NEW INTEK OHV ENGINE No: #56 DATE: 8/07 MODEL: 331777, 331877 Briggs & Stratton has recently introduced the new Model 330000 OHV vertical shaft engine. This engine is very similar to the Model 310000, sharing the same general maintenance, servicing, and troubleshooting procedures. It features a positive-sealing cylindrical air filter cartridge, an improved flywheel fan assembly, and has two lubrication system options: full and partial pressure. The following specifications, part numbers, and/or procedures are PRELIMINARY and subject to change. Dimensions Not for Reproduction
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SUBJECT: NEW INTEK OHV ENGINE No: #56 DATE: 8/07 MODEL ...
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ADVANCE PRODUCT SERVICE INFORMATION SUBJECT: NEW INTEK OHV ENGINE No: #56 DATE: 8/07 MODEL: 331777, 331877
Briggs & Stratton has recently introduced the new Model 330000 OHV vertical shaft engine. This engine is very similar to the Model 310000, sharing the same general maintenance, servicing, and troubleshooting procedures. It features a positive-sealing cylindrical air filter cartridge, an improved flywheel fan assembly, and has two lubrication system options: full and partial pressure. The following specifications, part numbers, and/or procedures are PRELIMINARY and subject to change. Dimensions
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Common Specifications SAE Metric
Armature Air Gap .010 - .014" .25 - .36 mm Bore Size 3.7005 ± .0005" 93.99 ± .01 mm Crankshaft End Play .002 - .023" .05 - .58 mm Displacement 32.94 ci 540 cc Oil Capacity - with filter 46 - 48 oz. 1.36 - 1.40 L Spark Plug Gap .030" .76 mm Stroke 3.062" 77.77 mm Valve Clearance - Intake -Cold .003 - .005" .08 - .13 mm
Valve Guide .237" 6.02 mm .240" 6.10 mm Valve Face Angle 45 ± .75 deg 45 ± .75 deg Valve Stem Diameter .2354" 5.98 mm .2334" 5.93 mm
Crankcase Cover/Sump PTO Bearing 1.6270" 41.331 .6285" 41.36 mm Cam Bearing .5015" 12.74 mm .5045" 12.81 mm
Crankshaft End Play .002 - .023" .05 - .58 mm
Crankshaft Crankpin Journal 1.4986" 38.06 mm 1.4966" 38.01 mm Mag Journal 1.3780" 35.00 mm 1.3760" 34.95 mm PTO Journal 1.6245" 41.26 mm 1.6225" 41.21 mm
Cam Shaft Mag-Side Journal .4995" 12.69 mm .4975" 12.64 mm PTO-Side Journal .4995" 12.69 mm .4975" 12.64 mm
Connecting Rod Crankpin Bearing 1.5003" 38.11 mm 1.5023" 38.16 mm Piston Pin Bearing .8009" 20.34 mm .8029" 20.39 mm
Piston Pin Diameter .8004" 20.33 mm .7994" 20.30 mm
Piston Pin Bore .8008" 20.34 mm .8028" 20.39 mm
Piston Rings End Gap - Top .009" .23 mm .030" .76 mm End Gap - Middle .018" .46 mm .030" .76 mm End Gap - Oil .010" .25 mm .035" .89 mm Ring Land Clearance – Top .002" .05 mm .005" .13 mm Ring land Clearance – Middle .002" .05 mm .005" .13 mm Ring land Clearance – Oil .002" .05 mm .005" .13 mm
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Common Service Parts Air Cleaner Cartridge 793569 Fuel Stabilizer (1 oz) Treats 2.5 gal. 5058 Air Cleaner Pre-Cleaner 793685 Fuel Stabilizer (4.2 oz) Treats 10 gal. 5041 Carburetor Overhaul Kit 792369 Oil SAE 30 100005 (20 oz) 100028 (48 oz) Engine Gasket Set 794150 Oil 5W30 Synthetic (32 oz) 100074 Spark Tester 19368 Oil Filter – Extended Life Series 5076 Flywheel Puller Tool 19203 Spark Plug (resister) 491055 Flywheel Strap Wrench 19433 Spark Plug (resister) –Platinum 5066 Fuel Filter (75 Micron) 394358S Spark Plug Wrench (5/8˝ and 3/16˝) 5067
Air Filter Flywheel
WARNING: DISCONNECT: Spark Plug and Battery (negative terminal).
Pry off CAP.
Fan locator SCREWS.
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Model 330000 engine has two lubrication system options: Full Pressure Lubrication w/Slinger
A. OIL FILTER B. OIL CHANNELS C. OIL PUMP D. SCREENED OIL PICK UP E. CRANKSHAFT BEARING (pressure lubrication) F. OIL CHANNEL - (from filter through crankshaft) G. CONNECTING ROD BEARING (pressure lubrication) H. CRANKSHAFT BEARING (pressure lubrication) Both systems include: Slinger Lubrication