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HomeRepair HelpKohler RepairKohler Small engine won't start Repair
Kohler Small engine won't start
If your Kohler small engine won’t start, begin with the spark plug. A worn, cracked, carbon-fouled plug or a plug with no strong spark can cause a small engine no-start condition. Test the spark plug with a spark plug tester and replace it if needed. Next, check the carburetor for blockage. Stale or ethanol-blended fuel left in the carburetor is one of the most common root causes on seasonal equipment. Old fuel can leave a sticky residue that clogs the carburetor and prevents starting, so clean, rebuild, or replace the carburetor as necessary. If the spark plug works, test the ignition coil with an ignition coil tester. A sheared flywheel key can also prevent proper ignition timing, especially after the engine stops suddenly. If the engine does not turn over when you pull the starter rope, inspect the recoil starter assembly for broken or stuck engagement tabs. Finally, test the start switch for continuity if it is difficult to turn or works intermittently. Enter your model number to find the exact replacement part for your Kohler engine.
01 - Kohler Spark Plug
Inspect the spark plug for signs of wear or damage. If the porcelain insulator is cracked, an electrode is burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug. To determine if the spark plug is defective, use a spark plug tester. You should see a strong spark between the tester’s terminals when the engine is cranking. If there is no spark, this indicates that the spark plug is defective and should be replaced.
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Top Solution
02 - Kohler Carburetor
The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the engine for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and prevent the engine from starting. If the carburetor is clogged, try cleaning it with carburetor cleaner. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor.
Top Solution
03 - Kohler Ignition Coil
The ignition coil sends voltage to the spark plug while the engine is running. If the ignition coil is defective, the engine may not start. Before replacing the ignition coil, ensure that the spark plug is working properly. If you have confirmed that the spark plug is working properly, test the ignition coil with an ignition coil tester. If the ignition coil is defective, replace it.
Highly Likely
04 - Kohler Flywheel Key
The flywheel key might have sheared in half. The flywheel key is a small metal piece which fits into the crankshaft and engages with the flywheel. If the engine stops suddenly, the flywheel key breaks in half to prevent damage to the engine. To determine if the flywheel key is broken, remove the flywheel from the engine and inspect the flywheel key. If the flywheel key is broken, replace it.
Highly Likely
05 - Kohler Recoil Starter
The recoil starter assembly engages the crankshaft to turn over the engine. If the recoil starter assembly is defective, the engine won't start. Remove the starter assembly and inspect it to determine if it is working properly. When you pull the starter rope, tabs extending from the pulley and cam should grab the hub on the engine, causing the engine to turn. When you release the rope, the tabs should retract and the rope should rewind back on the pulley. If the recoil starter assembly is not working properly, replace it.
Highly Likely
06 - Kohler Start Switch
If the start switch is difficult to turn or works intermittently, replace it. To determine if the start switch is defective, use a multimeter to test it for continuity. The switch should have an open contact in the 'on' position and a closed contact in the 'off' position.
Common
07 - Kohler Safety Switch
The safety switch can be tested with a multimeter to determine if it is defective.
Common
Frequently Asked Questions
Why won't my Kohler small engine start after sitting?
What should I check when my Kohler small engine cranks but won't start?
How do I know if the recoil starter is causing my Kohler engine not to start?
Could a sheared flywheel key keep my Kohler small engine from starting?
How do I find the correct replacement part for my Kohler small engine?