76 evinrude 15hp flywheel removal

[tashasdaddy]

Re: 76 evinrude 15hp flywheel removal

stripping the threads in the flywheel is not usually the problem. the thread strip off the bolt, leaving the theads, in the flywheel, then you have the problem of getting the compressed threads out of the hole, and a grade 8 bolt in.


PULLING FLYWHEEL

you need a harmonic balancer puller, you need 3 - #8 harden bolts, that fit the 3 holes in your flywheel. standard hardware store bolts will strip out, causing more problems. loosen the flywheel nut, leaving it on so it protects the thread. thread the bolts in 7/16 of an inch. then tighten the puller, adjust so it has a straight pull. now tighten the puller, rap the center bolt with a hammer, then tighten some more. you may have to let it sit over nite, and repeat in the morning. this is a compression fitting, it will eventually POP!!. do not loose the woodruff key that goes in the groove of the flywheel and the crank shaft. then installing the flywheel, it has to be totally clean, no oil, woodruff key in place. then torque the nut to the specifications for your particular motor. if you do not do this, the woodruff key with shear, and you will be repeating these steps.

 

[Tim Frank]

Re: 76 evinrude 15hp flywheel removal

stripping the threads in the flywheel is not usually the problem. the thread strip off the bolt, leaving the theads, in the flywheel, then you have the problem of getting the compressed threads out of the hole, and a grade 8 bolt in.

That makes perfect sense, thanks.

 

[Doubledog]

Re: 76 evinrude 15hp flywheel removal

Hi Gang,
I'm getting ready to perform the same task to a Belgium made '76 6hp Rude. After reading the responses here it sure is not what I was hoping for but I'll ask anyhow...

Has anyone successfully used a wheel bearing puller to remove a flywheel on a small hp engine?

Needless to say I'm going shopping for both a hamonic balancer puller & a bearing.

Thanks a bunch,
Jamie

I'll submitt pics one I get home.

 

[Cofe]

Re: 76 evinrude 15hp flywheel removal

When pulling the flywheel, I leave the flywheel nut screwed on by a few threads while useing a harmonic balencer puller. This is so your junk wont fly off and fall to the floor, or hit you when it pops loose. Just a thought

Ps. The fit of a flywheel is called a pressed taper fit. Pulling on the outside of the flywheel will deform the flywheel and actually pinch on the taper fit making it tighter. Use proper tools

 

[Cofe]

Re: 76 evinrude 15hp flywheel removal

Just a NOTE......If you're flywheel comes off really- really hard. Look at the underneath side of the flywheel and inspect for rubbing marks. Also see if your power pack , pickups, or points show an indication of rubbing. If so your flywheel may have been over-torqued before and has caused the damage by compressing the flywheel onto the tapered crank too far. Flywheel replacement is called for in this circumstance, unless you want to experiment with shimming up the flywheel with washers. But this is not advisable.

 

[iwombat]

Re: 76 evinrude 15hp flywheel removal

Harmonic balancer puller is the ONLY thing you should be using to take the flywheel off. Many a flywheel has been rendered scrap by using the wrong tool.

 

[Doubledog]

Re: 76 evinrude 15hp flywheel removal

Roger Doger. I'll heed your advice and order a balancer puller.

Here is my situation now: The OEM manual I bought shows that the coils are under the flywheel while mine have the coils mounted externally. Is this an issue? Note** - mine is belgian made SN: 66B66A B16795 ..... where my manual shows models 6604 & 6605. Is this an issue?

Dang, I need a flywheel nut just to be able to diagnose it as it was bought as a junk motor. Have a spare laying around?

Attached are my pics.

Thanks for all your input. -Jamie

 

[Cofe]

Re: 76 evinrude 15hp flywheel removal

Could you rob the nut off the other motor and see if it fits? Then if it does, take it down to the hardware store and check for a similar one? I noticed in your picture you have a little lathe also. I got mine a year ago, but haven't had time to set it up to cut threads yet. "One of these days"

 

[Doubledog]

Re: 76 evinrude 15hp flywheel removal

Hey Cofe. Yeah, I'm an aspiring machinist of sorts. Mainly do little things here & there as they come up for the radio control boats. Usually it means trashing three parts to get one right but it sure is fun & messy.:redface:

Might just consider the nut swap if it comes down to it.

 

[Tim Frank]

Re: 76 evinrude 15hp flywheel removal

If you are swapping a nut from a North American made motor, just be careful that there are not some metric threads involved with the Belgian unit.

 

[Doubledog]

Re: 76 evinrude 15hp flywheel removal

Alright gang, I need a flywheel nut. Anyone have one or two for sale?

Was down in the shop just now and tried a few bolts in the three holes on the flywheel around the crahkshaft. They are indeed SAE. If possible, for now could I order just a standard flywheel nut for this model? Paypal ready within 24 hours and we could utilize 1st class shipping in a bubble envelope.

Thanks again, Jamie