6
ENGINE PARTS
1. 12 V electric starter
2. Oil drain plug
3. Fuel fill
4. Fuel tank
5. Oil fill/Dipstick
6. Finger guard
7. Rope handle
8. Air cleaner
9. Engine Model Type Code
xxxxx xxxx xx xxxxxxxx
10. Muffler/(Muffler guard, if equipped)/
(Spark arrester, if equipped)
11. Spark plug wire
12. Rotating screen
13. Blower housing
14. Fuel filter
15. Carburetor
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2
3
4
5
8
9
10
11
7
12
14
15
13
GENERAL INFORMATION
ENGINE MODEL
This is a single cylinder, L-head, air-cooled engine. It is a
low emissions engine.
MODEL SERIES 190000
Bore 3 in. (76.20 mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke 2-3/4 in. (69.85 mm). . . . . . . . . . . . . . . . . . . . . . . . .
Displacement 19.44 cu. in. (318.5 cc). . . . . . . . . . . . . . . .
MODEL SERIES 250000
Bore 3-7/16 in. (87.31 mm). . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke 3-1/16 in. (77.78 mm). . . . . . . . . . . . . . . . . . . . . . . .
Displacement 28.42 cu. in. (465.7 cc). . . . . . . . . . . . . . . .
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°.
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 270962.
Model 190000 intake .005 – .007 in. (.13 – .18 mm). . . . .
Model 190000 exhaust .007 – .009 in. (.18 – .23 mm). . .
Model 280000 intake .005 – .007 in. (.13 – .18 mm). . . . .
Model 280000 exhaust .009 – .011 in. (.23 – .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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