Kohler Command 25 misting oil through breather

cbs123

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May 26, 2020
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Hello everyone,

Got a question I think I already know the answer to, but wanted a little verification. I've got a kohler command 25 vertical that is blowing a light mist of oil through the breather hose. Very light mist. Also has the hissing sound when you shut the engine off, the last few cycles of the motor you can hear the, "hiss" "hiss" "hiss"

Blown head gasket right? That causes the hiss as well as the oil misting problem, correct?
 

ILENGINE

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May 6, 2010
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That would be a good starting point. The early Ch/CV25 had issues with blown head gaskets but were fixed with updated head gaskets.
 
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