Re: OMC vs HF flywheel puller

[wetwillie]

Okay Dan, you talked me out of the washer atop the flywheel nut idea. 😉
I understand and agree with everything you wrote, Ben. However, FWIW, I believe that the stress applied to a shoulder bolt is concentrated at the shoulder where there’s a change in diameter. What makes that change worse is that its a step and not a radius. The only downside IMHO is that its more likely to break there than elsewhere. When the OMC shoulder bolt broke, it did so at that location, just below the flywheel surface. The other bolt snapped slightly above the surface making extraction a lot easier.
Tomorrow, I’ll get some heavy hard washers and swap them for the thin washers I have on top of the OMC washers. I’m also giving serious thought to buying some hardened bolts IF I can find any.
This morning, I tried again. This time, I heated the area around the interface too hot to touch. I then cooled the nut down till it was literally frosted. That’s as close to the crankshaft as I could get because of the nut. I figured it would draw the heat out of the crank end. I then gave it several good whacks with a 3 lb hammer. GOOD whacks!
It’s STILL on there! 🙁