I have an Exmark with a Kohler 34 hp CV940 engine purchased in June 2011. It has 328 hours on it. It leaks around the rear-most rocker cover. I replaced the gasket friday, came in today and there is oil all around the bottom of the cover again. There is no sign of oil coming from anywhere else. I removed the cover again, checked the gasket, checked the cover for damage/defects, nothing. My next move is to buy a rocker cover kit, and replace the gasket and cover and see what happens. Any ideas on why it is leaking? It is properly torqued using a torque wrench. We have 3 Exmarks with the same engine purchased at the same time. This winter I had to replace the rocker cover gaskets on the other two units. They are still good but I had to have the sump gasket replaced on one of them. Never had a problem with Exmark with the 34hp Kawasaki.