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6. Low Idle Fuel Needle Setting: Place the throttle
into the “idle” or “slow” position.
Turn the low idle fuel adjusting needle out
(counterclockwise) from the preliminary setting
until the engine speed decreases (rich). Note the
position of the needle.
Now turn the adjusting needle in (clockwise). The
engine speed may increase, then it will decrease
as the needle is turned in (lean). Note the position
of the needle.
Set the adjusting needle midway between the
rich and lean settings.
Adjust
Midpo
Rich
Figure 9.
7. Recheck the idle speed using a tachometer.
Readjust the speed as necessary.
Troubleshooting
When troubles occur, be sure to check the simple causes which, at first, may seem to 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.
Possible Cause No
Improper
Dirt In Dirty
Incorrect Engine
Dirty Air
Faulty
Problem Fuel Fuel
Fuel Line Grass Screen Oil Level
Overloaded Cleaner
SD&-k Plus
Will Not Start
l
a
0
0 0
Hard Starting l
0 0
0 0
0
Stops Suddenly 0
0
l 0
0 0
Lacks Power
0 0
0 0
0 0
l
Operates Erratically
e
0 0
0
0 0
Knocks or Pings
0
0
0
0
Skips or Misfires
0
0 0
0 0
Backfires
0
0 0
0
Overheats
0 0
0 0
0
High. Fuel Consumption
0
0
Storage
If the engine will be out of service for two months or
more, use the following storage procedure:
1 D Clean the exterior surfaces of the engine.
4.
2. Change the oil and filter while the engine is still
warm from operation. See “Change Oil and Oil
Filter” on page 8.
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.
5.
6.
To empty the system, drain the fuel tank and
carburetor, or run the engine until the fuel tank
and system are empty.
Remove the spark plugs. Add one tablespoon of
engine oil into each spark plug hole. Install plugs,
but do not connect the plug leads. Crank the
engine two or three revolutions.
Remove the spark plugs. Cover one spark plug
hole with your thumb, and turn the engine over
until the piston is at the top of its stroke.
(Pressure against thumb is greatest.) Repeat on
other side. Reinstall the plugs, but do not connect
the plug leads.
Store the engine in a clean, dry place.
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