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TROUBLESHOOTING & REPAIR
ENGINE THROTTLE ADJUSTMENT TEST (continued)
FIGURE F.4 – STROBE MARK LOCATION
MARK BLOWER
PADDLE
TEST PROCEDURE
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1.Turn the engine off.
2.Perform the Case Cover Removal proce- dure.
Strobe-Tach Method
1.With a white or red marking pencil, place a mark on one of the blower paddles. See Figure F.4 for location.
2.Connect the
3.Start the engine and direct the
With the machine at HIGH IDLE the tach should read between 3700 and 3750 RPM.
With the machine at LOW IDLE the tach should read between 2350 and 2450 RPM.
4.If either of the readings is incorrect, adjust the throttle as follows:
Adjust HIGH IDLE: Use the 3/8" wrench to loosen the
Adjust LOW IDLE: First make sure there is no load on the machine. Set the IDLER switch to AUTO and wait for the engine to change to low idle speed. Use the 7/16" wrench to adjust the solenoid nut, which changes the amount of throw in the throttle lever arm. See Figure F.6 for the location of the adjustment nut. Adjust the nut until the tach reads between 2350 and 2450 RPM.