Prop nut
 

Hi all,
Whats the thoughts on using Loctite on a Aluminium spinner nut to steel prop shaft ( OS 55 )
I have tightened it without loctite, but comes lose when starting with a battery starter ?
Can it cause any problems starting the engine in clockwise rotation to stop the nut coming loose ?

I use it as a jamb nut to fix that issue,,

I doubt your engine is going to start in the correction direction using a starter motor backwards,, sometimes just flipping the prop backwards can be a way to start it,,, but running a starter motor backwards,, not something I would try

good luck

https://cimg1.ibsrv.net/gimg/www.rcu...0f8790a3c8.jpg
https://cimg2.ibsrv.net/gimg/www.rcu...30bc3bf10b.jpg

I would venture a guess that your engine could be flooded and the fact that the nut comes loose is preventing the engine from getting damaged.

Adding one of these would help also
https://sullivanproducts.com/product...ey-light-lock/

Just tighten the nut enough !
I have never encountered that a prop nut would come lose using an electric starter (Sullivan)or flipping the prop by hand on any engine be it four stroke or two stroke.
And a locking nut as in the above message is not necessary!

Well we disagree I guess,, I always double nut my 4 strokes,,, if they weren't needed or at least highly recommended, why would YS provide a double nut system with all their 4 strokes? I guess they disagree too

I wouldn’t run a 4 stroke without a double nut, especially a YS. I still think the OP’s issue is excessive fuel.

I use an adjustable wrench and crank it on pretty hard and never had a problem except over time the wood props dried out a bit and had to be retightened. The wire through the hole may not be able to go tight enough unless the wire is big enough to be snug in the hole. The aluminum is directly on the prop, right? Not like the pic. I have had those unscrew every time. I have made hundreds of acorn nuts with no problem.