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Adjust to
Midpoint
Rich
Figure 14. Optimum Low Idle Fuel Setting.
3. Low Idle Speed Setting: Place the throttle control
into the "idle" or "slow" position. Set the low
idle speed to 1500 RPM* (± 75 RPM) by turning
the low idle speed adjusting screw in or out.
Check the speed using a tachometer.
Possible Cause No
Improper
Problem
Fuel
Will Not Start
•
Hard Starting
•
Stops Suddenly
•
Lacks Power
Operates Erratically
Knocks or Pings
Skips or Misfires
Backfires
Overheats
High Fuel Consumption
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
Filter" on page 9.
3. The fuel system must be completely emptied, or
the gasoline must be treated with a stabilizer to
prevent deterioration. If you choose to use a
stabilizer, follow the manufacturers
recommendations, and add the correct amount
for the capacity of the fuel system. Fill the fuel
tank with clean, fresh gasoline. Run the engine for
2-3 minutes to get stabilized fuel into the
carburetor.
Lean
Dirt In
Fuel
Fuel Line Grass Screen
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*NOTE: The actual low idle speed depends on the
application – refer to equipment
manufacturer's recommendations. The
recommended low idle speed for basic
engines is 1500 RPM. To ensure best
results when setting the low idle fuel
needle, the low idle speed must not
exceed 1500 RPM (± 75 RPM).
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 attempt 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.
Dirty
Incorrect
Oil Level
Overloaded
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To empty the system, run the engine until the
tank and system are empty.
4. Due to the deep recess around the spark plug,
blow out the cavity with compressed air. Remove
the spark plug. The spark plug is most accessible
when the blower housing is removed for
cleaning.
Add one tablespoon of engine oil into the spark
plug hole. Install the plug, but do not connect the
plug lead. Crank the engine two or three
revolutions. Connect the plug lead.
5. Reinstall the blower housing, if removed
previously, and torque the blower housing
screws to 7.5 N·m (65 in. lb.).
6. Store the engine in a clean, dry place.
Engine
Dirty Air
Cleaner
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Faulty
Spark Plug
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13
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