SERVICE AND ADJUSTMENT
HOW TO ADJUST THE CARBURETOR
A dirty air cleaner will cause the engine to run improperly or to smoke excessively. Be- fore adjusting the carburetor, make sure the air cleaner is clean. Never make unneces- sary adjustments to the carburetor. The car- buretor was set at the factory to operate efficiently under most applications. However, if adjustments are required, we recommend you contact your nearest Authorized Service Center. If you feel that you are competent to make carburetor adjustment proceed as fol- lows.
WARNING: Use extreme care when making adjustments that require the engine to be run-
ning. Keep hands, feet, hair and loose clothing away from all moving parts.
1.Turn the mixture adjustment screw clockwise to until closed (see Figure 15).
IMPORTANT: To prevent damage to the carburetor or to the adjusting screw, tighten the adjustment screws with your fingers.
2.Turn the mixture adjustment screw counterclockwise one turn.
3.Start the engine and let it warm up for approximately 3 to 5 minutes. Do not ad- just the carburetor when the engine is cold.
4.If the engine runs erratically or stops af- ter the choke lever is moved to the CHOKE OFF position, then open the mixture adjustment screw an addition- al 1/8 turn counterclockwise.
5.With the engine running, release the throttle control (idle position) to make the mixture adjustments.
6.Slowly turn the mixture adjustment screw clockwise until the engine begins to run erratically. Note this position.
7.Then, slowly turn the mixture adjustment screw counterclockwise until the engine again begins to run erratically. Note this position.
8.Turn the mixture adjusting screw clock- wise until it is halfway between the first position and the second position.
9.Check the engine idle speed. Start the engine and release the throttle control. If the tines do not turn with the throttle con- trol is released, the idle speed is correct. If the tines turn with the throttle control is released, adjust the engine idle speed as follows.
10.Have someone tilt the cultivator back on its depth stake so that the tines are off the ground.
11.Start the engine.
12.With the throttle in the released (idle position), turn the idle speed adjust- ment screw counterclockwise until the tines stop rotating.
WARNING: The engine gover- nor is set at the factory. Do not change the governor setting.
Over speeding the engine above the fac- tory setting can be dangerous. If you think the engine governor needs an ad- justment, contact your nearest Autho- rized Service Center.
Carburetor
Mixture
Idle Speed Adjustment Screw
Adjustment Screw
Engine Shown With Air Filter Removed
Figure 15
19 |
