Husqvarna 266 clutch

[Captain Bruce]

Looking for the correct procedure to install a clutch, on a 266. This is the coarse thread 1/2" crankshaft...the clutch is closed, with a small hole drilled in the center. It doesn't tighten past the end of the crankshaft, it bottoms out. Piston stop in place, I tighten with a socket and handle. I have tightened it twice, and it has come off twice....... LOCTITE? Torque wrench?

 

[Bob Hedgecutter]

So, threads are worn stretched- or you just aint tight enough yet.
Tried the old up to full RPM and engage the chain brake method yet?

 

[Captain Bruce]

So, threads are worn stretched- or you just aint tight enough yet.
Tried the old up to full RPM and engage the chain brake method yet?

I was expecting an engineer with the proper torque value.......but this fellow tinker named it....al the same, I'd enjoy some other suggestions. I'm thinking the clutch to tightened as far as the crank will allow, yet not enough?