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/System | Grass Screen | Oil Level | Overloaded | Cleaner | Spark Plug | |
Will Not Start | • | • | • |
| • | • | • | • |
Hard Starting |
| • | • |
| • | • | • | • |
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Stops Suddenly | • |
| • | • | • | • | • |
|
Lacks Power |
| • | • | • | • | • | • | • |
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| |
Operates Erratically | • | • | • |
| • | • | • | |
Knocks or Pings |
| • |
| • |
| • |
| • |
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|
Skips or Misfires |
| • | • | • |
|
| • | • |
Backfires |
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| • |
|
| • | • | • |
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Overheats |
|
| • | • | • | • | • |
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High Fuel Consumption |
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| • | • | • | |
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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 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
To empty the system, run the engine until the tank and system are empty.
4.Remove the spark plugs. Add one tablespoon of engine oil into each spark plug hole. Install the plugs, but do not connect the plug leads. Crank the engine two or three revolutions.
5.Store the engine in a clean, dry place.
Parts Ordering
The engine Specification, Model, and Serial Numbers are required when ordering replacement parts from your Kohler Engine Service Dealer. These numbers are found on the identification plate which is affixed to the engine shrouding. Include letter suffixes if there are any. See “Engine Identification Numbers” on page 6.
Always insist on genuine Kohler parts. All genuine Kohler parts meet strict standards for fit, reliability, and performance.
Major Repair
Major repair information is available in Kohler Engine Service Manuals. However, major repair generally requires the attention of a trained mechanic and the use of special tools and equipment. Your Kohler Engine Service Dealer has the facilities, training, and genuine Kohler replacement parts necessary to perform this service. For Sales & Service assistance call
Model Designation
Model CH20S for example: C designates Command engine, H designates horizontal crankshaft, and 20 designates horsepower. A letter suffix designates a specific version as follows:
Suffix | Designates |
S | Electric Start |
GS | Generator Application/Electric Start |
ST | Electric Start/Retractable Start |
QS | Quiet Model/Electric Start |
EP | Electric Plant |
CS | Clutch Model/Electric Start |
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