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Wayne, Engine Rebuilder
Category: Small Engine
Satisfied Customers: 9438
Experience:  many years on egine rebuilding, lawn mower,roto tiller,Truck,and small engines
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My Onan 6500LP is puking oil from the crankcase breather

Customer Question

My Onan 6500LP is puking oil from the crankcase breather into the aircleaner intake.
One person told me to check muffler for rust build up. Pulled plug on muffler maybe a teaspoon came out. It was not plugged.
Also sounds/feels like maybe intake manifold/head gasket is leaking. Feeling air being blown forcefully. Over 1000hrs on generator. Serviced regularly.
Any ideas what needs to be done?
Thank you,
Submitted: 1 year ago.
Category: Small Engine
Expert:  Wayne replied 1 year ago.

Hi I'm Wayne

I will help you with this

what you are describing is the riston rings are worn and cylinder

1K hours on small engine is a lot

I suggest you over haul or replace the engine

I hope this helped you

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