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The system requires an additional procedure for seing
the idle speed. If speed adjustments are required
proceed as follows.
1. Make any necessary speed or control adjustments
following the appropriate instructions covered in
this section.
2. Move the throle control to the idle position. Hold
the governor lever away from the carburetor, or
hold the throle lever so it is tight against the idle
speed adjusting screw, to negate the governor
activation. See Figure 19. Check the speed with a
tachometer and adjust it to 1500 RPM.
3. Release the governor lever and allow the engine to
return to the governed idle speed. Check it with a
tachometer against the equipment manufacturers
recommended idle speed. Governed Idle Speed
(RPM) is typically 300 RPM (approximate)
higher than the low idle speed. If adjustment is
necessary, bend the adjusting tab on the speed
control assembly to set. See Figure 18.
Figure 19. Holding Throttle Lever Against Idle Stop
Screw.
Governed
Idle Spring
Tab
Hold
Throttle
Lever
Against
Screw
Possible Cause No Improper Dirt In Dirty Incorrect Engine Dirty Air Faulty
Problem Fuel Fuel Fuel Line Grass Screen Oil Level Overloaded Cleaner Spark Plug
/System
Will Not Start • • • • • • •
Hard Starting • • • • •
Stops Suddenly • • • • • • •
Lacks Power • • • • • • •
Operates Erratically • • • • • •
Knocks or Pings • • • •
Skips or Misfires • • • • •
Backfires • • • • •
Overheats • • • • • •
High Fuel Consumption • • •
Figure 18. Governed Idle Spring Location.
Troubleshooting
When troubles occur, be sure to check the simple causes which, at first, may seem too obvious to be considered.
For example, a starting problem could be caused by an empty fuel tank. Some common causes of engine troubles
are listed in the following table.
Do not aempt to service or replace major engine components, or any items that require special timing or
adjustment procedures. Have your Kohler Engine Service Dealer do this work.
Storage
If the engine will be out of service for two months or
more, use the following storage procedure:
1. Clean the exterior surfaces of the engine.
2. Change the oil and filter while the engine is still
warm from operation. See Change Oil and Oil
Filter on page 8.