Flywheel Pulling, A Question (71 Jhnsn, 60 hp)

[Zep--]

I'm going to be pulling the flywheel off this weekend to continue my no spark trouble-shooting from a previous thread.

My question is, when breaking the flywheel nut loose, what is the best way to keep the flywheel from turning while trying to loosen the nut?

Should I squirt some wd-40 on it first to help loosen it or will that possibly damage something?

Thanks!
Carl

 

[85Sunbird]

Re: Flywheel Pulling, A Question (71 Jhnsn, 60 hp)

I've always used a screw-in piston stop and a 1/2" long handle ratchet. If the nut doesn't break loose with a decent amount of force don't put too much preasure on it because you might crack the piston with the piston stop. Get you a heat gun or propane torch and heat just the nut and not the end of the crank because you want the nut itself to expand.

It shouldn't be all that hard........good luck

Jason

 

[rickdb1boat]

Re: Flywheel Pulling, A Question (71 Jhnsn, 60 hp)

Air wrench is the best way. If you don't have one, might trailer the boat to the nearest automotive shop and have them bust it loose. Won't take them a minute. No sense in fighting it....

 

[Paul Moir]

Re: Flywheel Pulling, A Question (71 Jhnsn, 60 hp)

If you've got to hold it to remove it, you might as well think about how you're going to hold it to re-torque it when you're done. The best solution is a flywheel holding tool. An automotive flywheel turning tool may suffice. Bolting a made up "handle" to the ring gear if present is another solution.

I have jammed the starter to do this in the past, but I've always been prepared to replace the starter if I broke it. I don't like using the piston stop approach since it's too easy to put way too much force on the connecting rod and other expensive internal parts.