Re: When does a head need rebuilding on an F-20 ?

Posted by brianh on March 03, 2004 at 11:51:11 from (69.48.41.2):

In Reply to: When does a head need rebuilding on an F-20 ? posted by Pete L on March 03, 2004 at 10:30:51:

Generally speaking, an engine that runs OK under load but misses without load is running too rich. Many small engines, particularly old Kohlers, will do this when the mixture is set correctly under load. Those Zenith K-5 carbs are pretty crude. Can you minimize the miss by leaning it out slightly? The toughest test for any engine is when it is put under load. If it runs OK under load it is hard for me to believe that there is anything seriously wrong with the head.

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