279v42,46 - page 6 (Black)
Screen angle and frequency: 45.0000, 150.0000
6
ENGINE PARTS
1. Spark plug wire
2. Carburetor
3. Air cleaner
4. Rotating screen
5. Emission label and Engine
Model Type Code label
xxxxxx xxxx xx xxxxxxxx
6. Oil drain plug
7. Crankshaft
8. 12V electric starter
9. Fuel filter
10. Oil fill/Dipstick
11. Blower housing
3
5
1
2
4
8
10
9
6
7
11
GENERAL INFORMATION
ENGINE MODEL
This is a twin cylinder, overhead valve (OHV), air-cooled
engine. It is a low emissions engine.
MODEL SERIES 420000
Bore 3-7/16 in. (87.31 mm). . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke 2-9/32 in. (57.94 mm). . . . . . . . . . . . . . . . . . . . . . . .
Displacement 42.33 cu. in. (694.0 cc). . . . . . . . . . . . . . . .
MODEL SERIES 460000
Bore 3-7/16 in. (87.31 mm). . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke 2-15/32 in. (62.48 mm). . . . . . . . . . . . . . . . . . . . . . .
Displacement 45.64 cu. in. (748.0 cc). . . . . . . . . . . . . . . .
Note: For practical operation, the horsepower loading
should not exceed 85% of rated horsepower. Engine power
will decrease 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). It will operate satisfactorily at an angle up to 15°.
TUNE-UP SPECIFICATIONS
Armature air gap 0.010 – 0.014 in. (0.25 – 0.36 mm). . .
Spark plug gap 0.030 in. (0.76 mm). . . . . . . . . . . . . . . . . .
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 271172.
Intake 0.006 – 0.008 in. (0.15 – 0.20 mm). . . . . . . . . . . . .
Exhaust 0.009 – 0.011 in. (0.23 – 0.28 mm). . . . . . . . . . .
THE INTERNATIONAL SYMBOLS USED
ON THE ENGINE OR
IN THIS MANUAL INCLUDE:
On Off
Fuel Shutoff
Read Owner’s
Manual
Stop
FuelChoke
Safety Alert
Oil
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