11
37 590 02 Rev. B
KohlerPower.com
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Troubleshooting
Do not attempt to service or replace major engine components, or any items that require special 
timing or adjustment procedures. This work should be performed by a Kohler portable dealer.
Problem
Possible Cause
Engine Not 
Starting/
Running 
Abnormally  
Engine 
Stopped
No Electric 
Current
Tripping of 
Circuit
Breaker
Load connected to generating set 
during start-up
●
Start and Stop control ON or OFF ●
Oil level too low ●●
Unsuitable fuel ●
Fuel level too low ●●
Fuel valves closed ●
Clogged fuel fi lter ●
Clogged fuel strainer ●
Clogged air fi lter ●
Faulty spark plug ●
Fuel supply blocked or leaking ●
Blocked ventilation inlets ●
Circuit protectors not actuated ●
Faulty appliance supply cord ●
Faulty electrical sockets ●
Faulty alternator ●
Device connected or faulty cord ●
Overload ●