Guys I'm about to take the flywheel off my Johnson 200hp to rapair loose flywheel magnets, you guys got any things in particular to watch out for before I do this??? You guys got any ideas on a homemade tool to prevent the motor from turning while trying to get the flywheel nut loose?? Also what you guys recommend to clean up the surfaces to be glued and what kind of material to use to glue together?