Can not remove flywheel on 62 Evinrude 40hp.

[outlawfox13]

Ok, i have tried for two days in a row, and i am at a loss. I have broke one grade 8 bolt already, and it hasnt budged. I tried using pb blaster and let it soak for a week. I tried hitting the harmonic balancer in the center and nothing. Should i try some heat?

I would really like to get the flywheel off so i can replace the points n coils. Any help would be appriciated.

Mike

 

[HighTrim]

Re: Can not remove flywheel on 62 Evinrude 40hp.

Be sure to life UP on the flywheel BEFORE hitting the puller bolt or you will damage the crank.

Those big girls can be a bear sometimes. I have had to use a friend to hold the flywheel holder while I put an extension bar on the wrench on the puller bolt to really get some leverage on it! She popped. I have never had to use heat myself. As you know, grade 8 bolts are a must and stack a good pile of proper washers wide enough to keep from bending.

 

[kfa4303]

Re: Can not remove flywheel on 62 Evinrude 40hp.

Ditto. I had an old 33 hp Big Twin. The first time I got the flywheel off it sounded like a gunshot. I made a strap wrench of sorts with a large nylon ratchet strap and wrapped it around the perimeter of the flywheel such that it would tighten as used the puller. I secured the end of the strap with the hook in it to the factory lifting eye on the engine. I then used a large galvanized pipe as an extension bar on the ratchet. I was freaking out as I did it and I swore I broke something when it came free, but everything was fine. It sometimes helps to tighten it a bit, wait 30 sec., tighten it a bit, wait 30 sec. , etc.... You can even leave the puller on over night under pressure to see if that works. Make sure the puller is nice and level too. Here's a link showing how others have done it also.

http://www.duckworksmagazine.com/04/s/columns/max/24/index.cfm

 

[nwcove]

Re: Can not remove flywheel on 62 Evinrude 40hp.

an electric impact gun works wonders, just make sure to keep the flywheel nut on a few or more turns.

 

[outlawfox13]

Re: Can not remove flywheel on 62 Evinrude 40hp.

Ok, holding the flywheel is not the problem, i built a 3 foot spanner wrench. And i didnt break the grade 8 bolts at the head, they broke at the threads. I just broke another today. I tried heat, and still nothing. I actually have to get another harmonic ballancer puller as i broke this one. The threads ended up stripping as i tightened. I have cranked on this thing for a while, and the fly wheel is not budging. I still cant believe i broke 2 grade 8 bolts. Atleast the broken threads screwed out of the flywheel w/o a hitch. I will let pb blaster soak for a week again and try with a new puller. If anyone has tips please let me know.

Ok, just so i dont feel like a dummy, the only nut i have to romove for the flywheel is the center nut right? I have the recoil starter off. Thanks

Mike

 

[AlTn]

Re: Can not remove flywheel on 62 Evinrude 40hp.

I've had luck putting a 2x4 on the top outer edge of the f/w and whacking it with a hammer...rotate the f/w c/w a few inches and whack it again..tighten up on the puller and continue this process,,,fwiw

 

[nwcove]

Re: Can not remove flywheel on 62 Evinrude 40hp.

yep, just the center nut, but dont fully remove i!! when the flywheel does "pop", you dont want it to become a projectile. ( as i mentioned, if you do much wrenching on your own stuff, an impact gun works very well, they dont rely on twisting force as much as the impact that shocks things loose.)

 

[kfa4303]

Re: Can not remove flywheel on 62 Evinrude 40hp.

yikes. I can't believe you broke those bolts and the puller :/ at least the threads are ok and the flywheel is intact. i would try the bolts and puller one more time then get an impact wrench. I think you can get one at HF for like $35, if need be. It won't be the greatest quality, but it may serve this purpose. Leave the flywheel nut on too per the previous post. You don't want that flywheel hitting the ceiling or something crazy. Hang in there it'll come off eventually. Once it's off, the rest is easy. Good luck.

 

[1946Zephyr]

Re: Can not remove flywheel on 62 Evinrude 40hp.

I have tightened the bolts on the puller and the center puller bolt, to where they're tight, but not tight enough to snap the grade 8 bolts. Once everything is tight, I tap the top of the flywheel around the top in a circle and it usually helped pop of the flywheel. Don't hit it very hard, you won't need to.

 

[outlawfox13]

Re: Can not remove flywheel on 62 Evinrude 40hp.

Cool, i have removed flywheels before, i was just worried i was over looking somthing. I will give it a shot later. Thanks again yall

 

[1946Zephyr]

Re: Can not remove flywheel on 62 Evinrude 40hp.

Hey I have your motor too. Is that a Lark IV?

 

[outlawfox13]

Re: Can not remove flywheel on 62 Evinrude 40hp.

Yea, i believe it is

 

[1946Zephyr]

Re: Can not remove flywheel on 62 Evinrude 40hp.

Awesome. I got mine, along with a '61 Lark III and a '58 Lark for the total of 50 bucks for all three.

 

[F_R]

Re: Can not remove flywheel on 62 Evinrude 40hp.

Ok, holding the flywheel is not the problem, i built a 3 foot spanner wrench. And i didnt break the grade 8 bolts at the head, they broke at the threads. I just broke another today. I tried heat, and still nothing. I actually have to get another harmonic ballancer puller as i broke this one. The threads ended up stripping as i tightened. I have cranked on this thing for a while, and the fly wheel is not budging. I still cant believe i broke 2 grade 8 bolts. Atleast the broken threads screwed out of the flywheel w/o a hitch. I will let pb blaster soak for a week again and try with a new puller. If anyone has tips please let me know.

Ok, just so i dont feel like a dummy, the only nut i have to romove for the flywheel is the center nut right? I have the recoil starter off. Thanks

Mike

You are doing everything right. It is beginning to look like some genius has put Locktite on the tapers the last time it was apart. If that is true, good luck, you are going to need it.

 

[kodibass]

Re: Can not remove flywheel on 62 Evinrude 40hp.

This is how I do it, Lay motor on the ground find a good spot to pry between flywheel and block. Get a air hammer/chisel use the pointed round bit. loosen flywheel nut but don't remove as stated. pry up on flywheel (not allot of force is needed) give it 3-5 second burst with the tool, it will pop. this is much easier with 2 people. I have yet to find one this method will not get off. look at Harbor freight for(central pneumatic} super duty air hammer, its on sale right now for $13.99

 

[outlawfox13]

Re: Can not remove flywheel on 62 Evinrude 40hp.

While doing that method, do you keep spinning the flywheel? And will this warp it? I dont want to end up needing a new flywheel.

 

[rolmops]

Re: Can not remove flywheel on 62 Evinrude 40hp.

Are you using a harmonic balancer or a real OMC flywheel puller?
Harmonic balancers do not always pull straight and you may end up binding up the flywheel instead of releasing it.
If you have an OMC flywheel puller,then put the puller on there and tighten everything up. You can stick a screw driver or a bar into the side hole of the puller body to prevent the flywheel from turning.Tighten it up real good and make sure that the pull is evenly divided over the 3 bolts.(these things only break if one has way more force on it than the others) douse it in penetrating oil and let it sit over night. Usually you come back the next day and the flywheel is loose.If it is not loose,then tighten the puller another turn if you can and put some more oil on it then wait again. It will come loose. Sometimes a good whack( not an angry one) with a 2 pound hammer under the side of the wheel helps things along.Hitting the top of the crankshaft can destroy lots of seals and bearings inside your crankcase.
The right tools and patience are the solution.

 

[kodibass]

Re: Can not remove flywheel on 62 Evinrude 40hp.

outlawfox13 you do not spin the flywheel at all, just find a good spot to place the pry bar under the edge of the flywheels underside. pry tool on or close to the edge, so as not to break anything under the flywheel. with a small amount of pry pressure (5-7 lbs or so) have your helper zip gun (air chisel) the center of the crankshaft with the nut still on the crankshaft to protect the end threads, nut should be screwed onto crankshaft threads with about 1/8" above the end of shaft so chisel bit don't slide off shaft when you zip hammer it. whoever does the zip gun needs to push with moderate force so the vibration energy from the bit is centered & forced directly to the crankshaft, 3 5 second burst from the gun while another person keeps upward pressure on the flywheel, It works & usually very quick! If you are prying up on FW, and the zip gun has 80-90 psi from the compressor rarely do I get a 3-5 second burst most time it pops in less than a second 2 at the most. think of it as I'll push toward you, (pry-up) you push toward me (gun centered on shaft) ON the count of 3 1-----2------3--zzzzzzzzzzzzipop flywheels loose. keep us posted.

 

[outlawfox13]

Re: Can not remove flywheel on 62 Evinrude 40hp.

Ok, thanks for the clarification. I will give it a go tomorrow after work, since the pb blaster has been sitting on the flywheel for a week. Hopefully i will post pictures of the flywheel off the motor tomorrow.

 

[kodibass]

Re: Can not remove flywheel on 62 Evinrude 40hp.

make sure the air guns pressure is above 60 but under 90, when you place the round bit to the crank make you best effort to keep the tip of the gun on the crank end hole. 3-5 second burst while prying up on the underside of the flywheel, she will pop. keep us posted