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That would be a much easier fix. I can't feel any exhaust around the pipe so I thought I would run some fogging oil through it and maybe I will see a smoky leak. Thanks for the quick reply.

I have a Kohler Pro 20hp v twin that sounds like it has an exhaust leak. When Inspecting the muffler and attaching pipes I don't see an exhaust leaks. With my past experience with VW air cooled engines it sound like a combustion chamber leak. (Head Gasket) I have found quite a few repair videos...