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TROUBLESHOOTING AND REPAIR | ||
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ENGINE THROTTLE ADJUSTMENT TEST (continued)
FIGURE F.6 – BLOWER PADDLE MARKED FOR STROBE-TACH METHOD
Blower Paddle 
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TEST PROCEDURE
This test can be conducted by any one of four meth- ods.
Strobe-tach Method:
1.With the 5/16” nut driver, remove the 6 sheet metal screws from the case top.
2.Remove the rubber gasket (cover seal) from the lift bail.
3.Remove the fuel cap. The rubber gasket for the fill tube will come off with the case top.
4.Remove the case top, then replace the fuel cap.
5.Conduct this marking procedure with the gasoline engine OFF.
6.Remove the spark plug wires to prevent accidental engine kickback or starting.
7.With the black or red marking pencil, place a mark on one of the blower paddles. See Figure F.6 for location.
8.Connect the
9.Reconnect the spark plug wires and start the engine. Direct the
10.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 2150 and 2400 RPM.
11.If either of the readings is incorrect, adjust the throttle as follows:
Adjust HIGH IDLE: Use the 3/8” wrench to turn the
Adjust LOW IDLE: First make sure there is no load on the machine. Set the IDLE switch to AUTO and wait for the engine to change to low idle speed. Use the 3/8” wrench to adjust the solenoid nut, which changes the amount of throw in the throttle lever arm. See Figure F.8 for location of the adjust- ment nut. Adjust the nut until the tach reads between 2150 and 2400 RPM.
