We just did an M about three months ago. We took the 65 cold, and added ten percent, which actually came to around 72, that way we wouldn't have to do it again hot. The hour meter now has 91 hours as of today on a complete restore. It cut with an old no. 8w John Deere mower, a New Holland 56 pto rake, and a New Holland 68 baler with a Wisconsin motor. So, I figure 91 hours, working for probably 80-85 of those, the motor is good to go.