I just bought a "gently used" 52" Ferris DD with a 17hp Kawasaki V-Twin on it. I brought the mower home and put it in the garage over night(left tilted back b/c of deck cleaning). When I got back from school the next day there was quite a bit of oil on the cardboard under the mower. I looked over the engine and it seems to be coming from the left cylinder looing from back to front of the engine. Changed the oil+filter, left sit for a few nights, maybe one drop on cardboard. Used it this weekend on some slopes and leaked alittle(same spot). could this be a bad gasket? should i tighten down bolts around cyl. head? About 2 1/2 -3 seasons on engine, in excelent condition.