'57 big twin 35

coastranger

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Jul 11, 2009
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I have an evinrude big twin 35 and I'm having trouble getting to the coils. I put a harmonic gear puller on the fly wheel and it didn't budge. Does any one know how to replace the coils.
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,226
Re: '57 big twin 35

I have an evinrude big twin 35 and I'm having trouble getting to the coils. I put a harmonic gear puller on the fly wheel and it didn't budge. Does any one know how to replace the coils.

Remove the flywheel. You just gotta pull harder. But before you do, make sure you are using Grade-8 bolts. Screw them in 7/16", no more and no less. Then don't be gentle--give it heck and it will come off. If the puller breaks, get a better puller. But DO NOT use a puller that grabs the outside of the flywheel!!

Very Important!!! When you put it back on, make sure the tapers are clean and dry and use a torque wrench to tighten the nut to 60-65 ft/lbs. Failure to heed this advice may destroy your motor.
 

rolmops

Vice Admiral
Joined
Feb 24, 2002
Messages
5,531
Re: '57 big twin 35

I find that an original OMC flywheel puller works very much better than a harmonic puller,mostly because it is so much easier to apply even force to all the bolts. But no matter what puller you use,make sure to apply even pressure because if you don't the flywheel will bind.Some PC blaster applied in the evening may cause you to wake up to a surprise in the morning with the flywheel loosened up completely
 

R.Johnson

Rear Admiral
Joined
Sep 24, 2003
Messages
4,446
Re: '57 big twin 35

The factory puller is supplied with sholdered stripper bolt's, I have mentioned these many time's before. Never use these. they will save pulling the aluminum thread's out of the flywheel. Use a Number 8 bolt for what the hell ever good that will do. Someone will say they work fine,and they do. You can pull the threads right out of a tight flywheel. Never Never use the right tool ,when the wrong one is at hand.
 
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