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Garden Tractors and Mowers Vintage lawn and garden tractors, mowers, snow blowers, snowmobiles and other old machinery that is driven by small air cooled engines.

Garden Tractors and Mowers

12hp Kohler help

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Old 06-16-2009, 08:18:13 PM
gruby26 gruby26 is offline
Join Date: Jan 2009
Location: medford WI USA
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Default 12hp Kohler help

i replaced the rod rings and crank.It runs great but when it worms up i see a flame shooting in to the muffler.
its fine when i first start it but after it runs for a few min. it starts it. when i put the exhaust vavle lash at .017"-.019" the tapit dont even come close to the exhaust valve and dont decompess therefore wont turn over fastenuf to start but when i get it close enuf to start then it stays open when it worms up.
could i be getting this problem becuse i didnt replace the cam or the decompreshoin tab on the cam? i allmost forgot the exhaust valve is new also

the model # is K301a
and the spec# is 47446b
thanks for any help or in put
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