Kohler COMMAND PRO CS Series User Manual download pdf (Page 15)

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.

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

Will Not Start • • ••••

Hard Starting •• • • • •

Stops Suddenly • •••••

Lacks Power •••••••

Operates Erratically ••• • ••

Knocks or Pings •• • •

Skips or Misfires ••• ••

Backfires ••••

Overheats •••••

High Fuel Consumption ••

• Make sure fuel is reaching the carburetor. This

includes checking the fuel lines and components

for restrictions or problems. Replace as

necessary.

• Make sure On-Off switch is functioning properly.

• Make sure the air cleaner element is clean and all

air cleaner components are fastened securely.

If, after checking the items listed above, the engine is

hard to start, runs roughly, or stalls at low idle speed, it

may be necessary to adjust or service the carburetor.

Adjust Carburetor

NOTE: Certified engines have a limiter cap on the idle

fuel adjusting needle. Adjustment can only be

performed within the limits allowed by the cap.

1. Start the engine and run at half throttle for 5 to 10

minutes to warm up. The engine must be warm

before making final settings.

2. Low Idle Fuel Needle Setting: Place the throttle

into the ‘‘idle’’ or ‘‘slow’’ position. Turn the low

idle fuel adjusting needle/cap in or out within

adjustment range, to obtain the best low speed

performance.

3. Low Idle Speed Setting: Place the throttle control

into the ‘‘idle’’ or ‘‘slow’’ position. Set the low idle

speed to 2000 RPM* (+ 150 RPM) by turning the

low idle speed adjusting screw in or out. Check

the speed using a tachometer.

*NOTE: The actual low idle speed depends on the

application – refer to equipment

manufacturer's recommendations. The

recommended low isle speed for basic

engines is 2000 RPM. To ensure best

results when setting the low idle fuel

needle, the low idle speed must not

exceed 2000 RPM (+ 150 RPM).

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Kohler COMMAND PRO CS Series User Manual Page 15

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