Hi
I have just converted a Super Tigre to run clockwise. It started first flick, I blipped the throttle a few times, then the propellor came off.I know that the shaft really needs a left hand thread, but it hasn't got one. The nut holding the prop. was secured with locking wire, which broke. Now, I could use thicker wire, but I'm sure there must be a more elegant solution.
Any ideas please?
JR

I would try the red Loc-tite stud and bearing mount locker if it were mine. I have held flywheels on old enduro motorcycles with the stuff.

It can still be dis-assembled if you really need to by heating the parts with a torch.

Hello,
Try putting another nut on the shaft and tightening both nuts together. You may need to put the second nut on backwards if your using another prop nut.

Use a lock nut as a jam nut,the one with the plastic in it.Or,install a castle nut,then drill a hole [small]through crankshaft and through a space in the castle nut and use a cotter pin.If ya think the cotter pin might wear and let go,try a steel nail that fits snug and then bend over and snip off the excess.Dont worry about anything being off balance,your to close to the center of crankshaft to matter.

If you try locktite first...make absolutley sure all the threads and other parts are super clean. Any to much oil residue will weaken the bond. Use double nuts too. My 2 cents! Capt,n

Hi Guys
Many thanks for your input. I have finally decided to fit two nuts, similar to what they have on four-stroke engines. I can see that drilling the crankshaft and fitting a pin is very positive, but I don't want to risk messing up the crankshaft. Loctite is good too, but since I am using a wooden prop. when I come to remove it the heat might wreck it.
Thanks again.
JR

I would use the double nut technique, and Loctite as well. The Loctite doesn't have to be heated really hot to loosen up. You could probably unscrew the nuts without heat, but if heat is needed, a good soldering iron could get it hot enough...

AV8TOR