Have some salvaged mowers trying to repair and got a leak on top part mower under flywheel on the mower in title. replaced the upper crankshaft seal, but still getting oil. Can there be be any other areas/seals on the top that could be causing a leak? do not see any on schematic. may have put seal in wrong. have seen a you tube video where a guy uses permatex aviation gasket form a seal on outside of a seal. what are your opinions on this? thanks for any help.