Document: - page 6 (Black)
Screen angle and frequency: 45.0000, 150.0000
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ENGINE INFORMATION
1. Rope handle
2. Carburetor
3. Air cleaner
4. Fuel shut-off valve
5. Fuel tank (if equipped)
6. Fuel fill
7. Stop switch (if equipped)
8. Engine Model Type Code
xxxxx xxxx xx xxxxxxxx
9. Blower housing
10. Muffler/(Muffler guard, if equipped)/
(Spark arrester, if equipped)
11. Oil drain plug
12. Oil fill cap
13. Crankshaft
14. Extended oil fill/
Dipstick (if equipped)
15. Spark plug (see page 15)
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2
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6
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3
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9
12
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10
14
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GENERAL INFORMATION
This is a single cylinder, L-head, air-cooled engine. It is a low emis-
sions engine.
MODEL SERIES 90000
Bore 2-9/16 in. (65.09 mm). . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke 1-3/4 in. (44.45 mm). . . . . . . . . . . . . . . . . . . . . . . . .
Displacement 9.02 cu. in. (148.0 cc). . . . . . . . . . . . . . . . . .
TUNE-UP SPECIFICATIONS
Armature air gap 0.006 – 0.010 in. (0.15 – 0.25 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 270962.
Intake 0.005 – 0.007 in. (0.13 – 0.18 mm). . . . . . . . . . . . .
Exhaust 0.007 – 0.009 in. (0.18 – 0.23 mm). . . . . . . . . . .
Note: 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°.
