ORIGINAL: av8tor1977
Take the glow plug adapter out, and insert a length of soft cotton rope. The piston will come up and hit and compress the rope, and stop the engine from turning over so that you can get the prop hub tight. Use Loctite, and let it set overnight before use.
AV8TOR
I know a lot of people will say do not try this. It is to hard on the engine. That is not true. If you use the rope it will not hurt the enine. In facked the force that you put on the engine to make the prop hub tight is about 1/10th of the force the engine has on the crank and rod when it is running. This is the best way to do this. Av8tor know what he is talking about.
I just put this in here cuz it seems as if it is a bad thing to do. but it is not.
Paul