Engine Parts; Tune-Up Specifications - Briggs & Stratton 351700, 380700, 381700 Operating & Maintenance Instructions

ENGINE PARTS

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1. Air cleaner
2. Carburetor
3. Rewind starter (if equipped)
4. Blower housing
5. Oil filter (if equipped)
6. Spark plug wire
7. Oil drain plug
8. Oil fill/Dipstick
GENERAL INFORMATION
ENGINE MODEL
This is a twin cylinder, overhead valve (OHV), air-cooled
engine. It is a low emissions engine.
In the state of California, Model Series 350000 and 380000
engines are certified by the California Air Resources Board
to meet emissions standards for 250 hours. Such certifica-
tion does not grant the purchaser, owner or operator of this
engine any additional warranties with respect to the
performance or operational life of this engine. This engine
is warranted solely according to the product and emissions
warranties stated elsewhere in this manual.
MODEL SERIES 350000
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement . . . . . . . . . . . . . . . . . . .
MODEL SERIES 380000
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement . . . . . . . . . . . . . . . . . . .
For practical operation, the horsepower loading should not
exceed 85% of rated horsepower. Engine power will de-
crease 3-1/2% for each 1,000 feet (300 meters) above sea
level and 1% for each 10 F (5.6 C) above 77 F (25 C).
Engine will operate satisfactorily at an angle up to 15 .
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2.83 in. (72 mm)
2.76 in. (70 mm)
34.7 cu. in. (570 cc)
2.97 in. (75.5 mm)
2.76 in. (70 mm)
38.2 cu. in. (627 cc)
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9. Rotating screen
10. Emission label
11. Engine
12. Fuel pump
13. Exhaust manifold
14. 12V electric starter
THE INTERNATIONAL SYMBOLS USED
ON THE ENGINE OR
IN THIS MANUAL INCLUDE:
Safety Alert
On Off
Fuel Shutoff

TUNE-UP SPECIFICATIONS

Armature air gap . . .
Spark plug gap . . . . . . . . . . . . . . . . . .
Valve clearance with valve springs installed and piston 1/4 in.
(6 mm) past top dead center (check when engine is cold).
See Repair Manual P/N 272144.
Intake . . . . . . . . . . . . .
Exhaust . . . . . . . . . . .
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Model Type Code
xxxxxx xxxx xx xxxxxxxx
Read Owner's
Manual
Oil Stop
Choke Fuel
0.008 – 0.012 in. (0.20 – 0.30 mm)
0.030 in. (0.76 mm)
0.004 – 0.006 in. (0.10 – 0.15 mm)
0.004 – 0.006 in. (0.10 – 0.15 mm)
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