76 evinrude 15hp flywheel removal

[joho5]

Having a hard time getting the flywheel off, i was wondering what methods you guys have used with problematic flywheels.

Can you tap the flywheel from underneath? When you tap it with a hammer or rubber mallet, do you hit it directly from on top, or from the side?

What products have you guys used?

I am just seeing what else I need to try.

thanks

 

[fixmyevinrude]

Re: 76 evinrude 15hp flywheel removal

Are you using a flywheel puller? I would not hit the flywheel at all with anything. Apply pressure with the puller and give the center pressing screw a rap with a hammer. I usually put a little penatrating fluid on the seam for the taper.

 

[HybridMX6]

Re: 76 evinrude 15hp flywheel removal

I believe most of us use a harmonic balancer removal tool available from nearly any auto parts store. You will need to know what size bolts you need also for the top of the flywheel and make sure you get the grade 8 bolts. Otherwise, you will strip out the bolt holes in the top of the flywheel. Once you get it on and tightened down, you can hit the top of the removal tool (it's a large nut on top), and it should slowly pop the flywheel off. Most advice is DO NOT hit the flywheel anywhere, only the tool.

 

[charleso]

Re: 76 evinrude 15hp flywheel removal

The automotive harmonic balancer puller works like a charm, new one should come with an assortment of different bolts, one set of which will work. Tap the puller, NOT THE FLYWHEEL. Penetrating fluid will not hurt, but the flywheel is not stuck, it is magnitized, it should come loose with moderate pressure.

 

[joho5]

Re: 76 evinrude 15hp flywheel removal

Yes I am using a puller. I have pulled flywheels before but have never had one not pop off. I am using 1/4 inch grade 8 bolts. I have tightened the puller to the max, or at least what I am capable of. It is very tight. I have put padding and hit the top of the bolt. I have lightly tapped the undersides of the flywheel out of desperation. I have tried lightly prying it while tapping the top.

I guess I need to get some penetrating fluid and just do the time trick...let it sit, tighten it, tap it, let it sit, etc...

any other ideas. I have done this before, its not new to me.

thanks guys

 

[iwombat]

Re: 76 evinrude 15hp flywheel removal

Tighten it all the way up and give the top of the puller a solid whack.

 

[joho5]

Re: 76 evinrude 15hp flywheel removal

where is the recoil from that hit going? I dont want to mess anything up, but if there isnt anything that will really get damage I will give it a solid whack.

Im just making sure nothing can be damaged by hitting the top of the puller bolt.

thanks

Matt

 

[ezeke]

Re: 76 evinrude 15hp flywheel removal

I'm with Iwombat on this.

Have the motor suspended on the transom bracket, so the motor is not supported by the skeg. With the three bolts as tight as possible, give the large center bolt of the harmonic balancer a good solid tap with your heavy hammer.

To the best of my knowledge, no one on this forum has ever said with certainty that they lost an engine doing this.

There are many examples of ruined flywheels from using heat and/or pressure directly on the flywheel.

 

[Rick.]

Re: 76 evinrude 15hp flywheel removal

ezeke says "a good solid tap" Ezeke don't you mean a good solid smack/rap/poundng/hammer? A tap by my experiance, is a very light blow. LOL I've used pullers on car suspension components that when the part releases you want to run for cover and by the sound, your certain the puller has broken in two and yet when you look, the part has seperated just the way it is supposed to. To a repairman, Torque=butterflies. Rick.

 

[HybridMX6]

Re: 76 evinrude 15hp flywheel removal

If I had mine to do again I'd hit it with an impact wrench. I ended up having to lightly tap mine with a rubber mallet all around, until finally it popped and about scared the crap out of me.

 

[ezeke]

Re: 76 evinrude 15hp flywheel removal

My heavy hammer is a 2 pound steel maul with a 16" handle; you tap with that and it will split an elephant's skull. When you strike steel with steel, it doesn't take a lot.

Try one. You will see what I mean: http://www.hammersource.com/Sledge_Hammers.html

 

[Rick.]

Re: 76 evinrude 15hp flywheel removal

Indeed that is a heavy hammer. This flywheel is proving to be stronger than an elephants skull then. I have supported the weight of a motor by holding it under the flywheel and having a mate give the center shaft a good sharp blow with a hammer and punch. It worked well but haven't done that since I bought the correct puller. Rick.

 

[Mas]

Re: 76 evinrude 15hp flywheel removal

Maybe tight is not tight enough? Every time that I've pulled my flywheels, I can never get enough torque (on the puller or flywheel nut) because I cannot hold the flywheel from spinning while I torque the wrench. So, I drilled some 3/16" x 2" flat bar stock that's 3 feet long with a hole the size of my socket for the flywheel nut. I also marked & drilled out 3 180 degree holes where I can screw the puller bolts through and into the flywheel. Now I have enough torque to with the "flat bar" and wrench to get enough tension to pop the flywheel off. This is also great to use when I torque the flywheel nut down to specs, and I can do this without help.

My "bar" now has a couple of flywheel "setups" drilled into for my different motors. Works great!

If you need a pic, I can reply one!

MAS

 

[Mas]

Re: 76 evinrude 15hp flywheel removal

Here's a couple of pics anyway.

MAS

http://i129.photobucket.com/albums/p219/mas421/DSC05512.jpg
http://i129.photobucket.com/albums/p219/mas421/DSC05511.jpg
http://i129.photobucket.com/albums/p219/mas421/DSC05510.jpg
http://i129.photobucket.com/albums/p219/mas421/DSC05508.jpg

 

[Rick.]

Re: 76 evinrude 15hp flywheel removal

Mas. That is a great idea. Up here in the north country I give the fly wheel a one armed bear hug and I can torque to 45 lbs. My ribs are sore for days after so if you don't mind I'll make a replica of your tool. Thanks, Rick.

 

[iwombat]

Re: 76 evinrude 15hp flywheel removal

You can also just put the motor in gear and put a block of wood between the prop and the anti-cav plate. That'll work fine on the smaller motors.

That being said, a rattle-gun is still the best way.

 

[joho5]

Re: 76 evinrude 15hp flywheel removal

man, thanks guys. I am rebuilding the carb right now and changing the impeller. After that I will get back to the ignition components and flywheel. I will update my process within the next couple of days.

thanks tons

 

[Mas]

Re: 76 evinrude 15hp flywheel removal

So, I drilled some 3/16" x 2" flat bar stock that's 3 feet long with a hole the size of my socket for the flywheel nut. I also marked & drilled out 3 180 degree holes where I can screw the puller bolts through and into the flywheel.

Sorry...check the math...that would be three 1/4 inch holes drilled 120 degrees apart....not 180. It's back to school for me!

Mas

 

[Rick.]

Re: 76 evinrude 15hp flywheel removal

Ya I saw that right off but I thought you mean 3 half round holes (180) and I've been having a heck of a time getting the correct drill bit!! One of the many things I like about this forum is the lack of hair splitting. Mostly great people that just want to get their and others motors running well. Rick.

 

[Tim Frank]

Re: 76 evinrude 15hp flywheel removal

There is a repeating claim in a number of threads re: pulling a flywheel, that you need to use grade 8 bolts to avoid stripping out the holes in the flywheel.
I wouldn't disagree that the grade 8 bolts are what should be used to avoid breaking a lower grade bolt, which can be dangerous ~ but ~
wouldn't the tougher bolt be less likely to "give" first and thus be more likely to strip out the threads in the flywheel?