I’m resurrecting thread because of a noisy lifter after waking up the box from a long sleep. I put a bottle of marvel mystery oil into the crankcase and let it idle for twenty minutes and shut it down. Restarted the box today,(two weeks later), and low and behold the noisy lifter is silent and the entire engine seems to be running quieter than last year. Will change the oil and should be ready for April.
