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I have a Kohler command 14 engine with 500 hours on a Gravely…

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I have a Kohler command...
I have a Kohler command 14 engine with 500 hours on a Gravely rider which looses power after about an hour mowing in hot weather. It does not stop on cool days (75F). I have replaced the fuel filter, the fuel pump, the coil and loosened the fuel cap, all to no avail. Ajny other suggestions?
Submitted: 8 years ago.Category: Small Engine
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Answered in 3 minutes by:
6/16/2010
Technician: adamsntr, Technician replied 8 years ago
adamsntr
adamsntr, Technician
Category: Small Engine
Satisfied Customers: 68
Experience: 10+ years with heavy equipnment and small engine repair
Verified

It sound like the engine is not getting enough air to cool it check under the flywheel cover and around the engine fins for debris.

Is there any metal fuel lines around a heat source? This could cause a vapor lock.

Have yo don't a compression check when hot and when cold?

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Customer reply replied 8 years ago
I replaced the coil--hence removed the covers and removed some chaff. It still cuts off when hot. How does one stop vapor lock? No non ethanol gasoline around here. No compression check-
Technician: adamsntr, Technician replied 8 years ago

To help from vapor lock you need to keep the fuel lines as far away as possible from any heat source.

What is the coil gapped at?

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