I have two John Deere L110 lawn tractors. One runs perfectly quite (except of course the normal engine noise). Both have the Kohler 17.5 hp engine. CV491/27509
The other one I purchased from my next door neighbor and it is NOISY. Initially I thought it was the gasket on the exhaust pipe and I replaced it. Did not help. I thought also it could be the muffler or baffle inside the muffler, but the muffler looks good and the baffle inside it is intact. The lawn tractor runs great, starts great and has no problem running. Power output is good.
The noise is really getting to me. I am now thinking it could be the head gasket, but am not sure. The noise is not a popping noise, it just sounds like an exhaust noise.
Any suggestions would be appreciated.
John