My PTO side seal on my Onan went last Friday, I was on an incline grading a driveway and the oil flowed back into the flyweel fan and blew everywhere including the air cleaner and began to smoke. Thought I blew the motor. I ordered the bearing plate gasket and new seal yesterday and they cost me $33 shipped, Onan parts are 2-3 times the cost of Kohler. I'd like to have that 20 Magnum myself but not at $400+ and not at a 3rd party word that's it's a good motor.

Scott