Hi hope someone can help.

The spinner (nut) that secures the propeller to the crankshaft keeps coming loose. I'm using a crankshaft locking tool so at time of assembly it's tight.

I'm using an electric drill with a max rpm of 2000 (in reverse).

After a lengthier bursts with the drill (5 secs) the spinner comes loose.

Anyone experience this? And more importantly what did you do to correct.

Thanks in advance.