A friend of mine has a substantial oil leak, We see it dripping off the lower starter bolt about every 45 seconds one drip. He cuts a residential lawn that takes about 5 hours a week, he is using about 8oz oil per cut. The motor had so much oil all over it that it was difficult to really see if there were other areas leaking. I told him to gunk the motor and pressure wash it clean then we could better assess where the leak is originating from. Do these motors have any know oil leaks that we should check. We took the breather off and it didn't appear any leaks were coming from the top of the motor. I'm kinda leaning towards the front seal behind the flywheel, but am not totally sure. Any tips/advice? Thank you