sears ss/16 onan

i have a sears ss/16 with an onan engine. engine runs great for about an hour and then starts to blow oil into the air cleaner. let it cool back down and it runs fine again for about an our or so. any ideas of what is going on? thanks-happy
 
You may want to check the breather check valve look in the Onan service manual and it will explain abiut the breather and valve.
GB in MN
 
Clogged breather valve. Is a very common problem. Clogged up and the engine will push out oil anywhere it can. Could be some other problems. But the breather valve would be the place to start.

Onan tech since 1980
 

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