BoatBanter.com - View Single Post - stuck outboard flywheel removal info sought!!!!!!!

Keyser Soze

On 12/10/17 12:46 PM, wrote:
On Sun, 10 Dec 2017 07:00:28 -0800 (PST), wrote:

On Tuesday, 6 May 1997 08:00:00 UTC+1, wrote:
?Help, my force 85 hp needs the flywheel removed and the things stuck fast, penetrant
oil is useless. How much if any heat can be applied where to get it loose? Its only been
on two years and was installed with neversieze so it shouldnt be such a pain.
Thanks in advance
tom.

Loosen the flyweel nut and apply WD40 (or similar) to shaft - leave overnight. Use a correct puller (make or buy) threaded into the (usually) three holes in the flywheel. With the centre bolt torqued up with as much as you can muster with a typical standard length socket wrench and holding the flywheel with a strap wrench to stop rotation, hit the centre bolt to jar the taper free. May need several blows, but don't overdo it! I would consider that heat is the last resort, as the risk of damage is high. By the way, heating the flywheel enlarges the centre hole because the whole flywheel becomes slightly larger, including the centre hole.

I have had a lot of luck by putting the puller on cranking it down as
tight as you can get it and walk away. Sometime over night they
usually pop off. Be sure to leave the nut on loosely so when the
flywheel pops loose, it won't fall to the ground. If it is not loose
by morning use a heat gun to warm up the flywheel and put ice on the
shaft. (circuit cooler, dry ice or whatever)
If you get it too hot you will destroy the magnets.

I'd guess that Force 85 now resides in the Outboard Happy Hunting Ground
at the bottom of a bay somewhere...