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Does anyone out there know what size flywheel puller I need to remove the flywheel on a '72 250 MAR? From what I can roughly measure, the inside diameter of the flywheel is 26mm. Not sure about the pitch.

Thanks Woody. That clears up a lot of my confusion.

This is for Woody if you are listening. I tried to reply to your question about the engine number on the ossa that I need to remove the flywheel on. Could not send a message directly to. I'm not sure if you will see this but the engine number is M-343770.

The engine number is M-345710.

Thanks Newbie. The manual I have does not specify direction. I just hate to go the wrong direction and make it tighter and harder to get off. I will look closer at the threads and just be careful.

Thanks for the reply, Newbie. I guess that the simple answer would be, whatever direction the flywheel turns when the engine is running, is the direction you turn the nut to loosen it?

I need to pull the magneto flywheel off on a '72 250 MAR. Probably a silly question, but which direction do I turn the flywheel nut? Clockwise or counterclockwise.

Thanks, Mick. Am I correct in assuming that when new, the motor number and frame number matched? If so, that clears up the confusion on my end. Thanks again.

I have two Ossa engines, one frame that I believe to be 1972 250 MARs. There is no number on the frame, but the engines numbers are: M-345710 and M-343770. The limited information I can find anywhere show only numbers beginning with the letter B. Any information anyone has would be helpful for when trying to find parts. Thanks.