61x coupler removal

[SharkB8]

I have to remove a coupler from a 20-year old 6m6 that has been ridden in salt water almost exclusively.

I expect it to be a little snug. Here is my plan - can someone tell me if this sounds reasonable.

The motor is out of the hull, currently standing on-end, coupler end up, with penetrating oil soaking in the top.

I have a pretty good homemade flywheel holder (a 3-foot piece of hardwood flooring with appropriate holes drilled - it bolts on the flywheel just fine, with a hole to access the large bolt). I plan to set the engine on the garage floor, with the flywheel held firmly by a family member or unsuspecting passer by, and use an 8-foot long piece of 2x2 softwood to get the coupler to turn.

I could clean the penetrating oil off and heat the coupler / shaft a little with a small propane torch. Or will that just ruin nearby seals.

I could also buy the proper coupler tool I guess, but I don't want to wait a week for one to arrive in the mail, plus I think the 8-foot length of my wooden pry-bar might give me the extra leverage I need to get the coupler off.

Any suggestions?

Thanks all....

 

[Boris]

All I needed for mine was a short piece of rope down the rear spark plug hole and a 2' piece of 2x4.

Came right off.

 

[Waternut]

Yeah the rope in the spark plug hole should do the trick just fine. That's all I've ever done and I've pulled off some nasty couplers that wouldn't spin without force until they were off.

 

[QJS]

I have to remove a coupler from a 20-year old 6m6 that has been ridden in salt water almost exclusively.

I expect it to be a little snug. Here is my plan - can someone tell me if this sounds reasonable.

The motor is out of the hull, currently standing on-end, coupler end up, with penetrating oil soaking in the top.

I have a pretty good homemade flywheel holder (a 3-foot piece of hardwood flooring with appropriate holes drilled - it bolts on the flywheel just fine, with a hole to access the large bolt). I plan to set the engine on the garage floor, with the flywheel held firmly by a family member or unsuspecting passer by, and use an 8-foot long piece of 2x2 softwood to get the coupler to turn.

I could clean the penetrating oil off and heat the coupler / shaft a little with a small propane torch. Or will that just ruin nearby seals.

I could also buy the proper coupler tool I guess, but I don't want to wait a week for one to arrive in the mail, plus I think the 8-foot length of my wooden pry-bar might give me the extra leverage I need to get the coupler off.

Any suggestions?

Thanks all....

If you do it like this and its real tight you will probably need to have the crank trued afterwards.
Chris.

 

[SharkB8]

Would the rope trick be less likely to cause damage than my plan to hold the flywheel?

 

[Motorheads5]

Use the rope in the cyl. closest to the coupler and also use heat.

 

[SharkB8]

The "rope trick" worked like a charm. ha.. I love this place.

 

[Kennay]

If you do it like this and its real tight you will probably need to have the crank trued afterwards.
Chris.

For some reason I find this extremely hard to believe.

 

[Buckwild12]

can someone explain this rope trick.

I had my coupler explode on me this weekend, I have a tbm one on the way. Id like to get this thing in the water again asap. I am learning how to turn wrenches really quick with this new ski. Any advice and instruction would be awesome. fyi there isnt much of the coupler left to get ahold of.

 

[tor*p*do]

fyi there isnt much of the coupler left to get ahold of.

it is only aluminum!
hacksaw, dremel cutoff wheel, sawzall, drill, whatever,
break it up and remove it without damaging the crank threads!
(or a big pipe wrench and the rope trick)

 

[Buckwild12]

im trying to find out what the rope trick is.

I am tryingto find out what the rope trick is, I have never been into my motor this deep. which way do i have to turn the pieces to get it to come off? is it reverse threaded or righty tighty. i may wait for my new one to get here to see how it joins with the engine. I hada superjet shop manual on cd here somewhere, but i cant seem to find it at the moment.

 

[tor*p*do]

rope trick is easy
pull motor, pull plugs,
get a piece of fat rope that barely fits through plug hole
feed rope into rear cylinder to lock up motor
and keep crank from truning
remove coupler with wrench

 

[Buckwild12]

ahh! i get it! thanks for the help, i am going to give it a shot when my parts get here. and a stick in the pump to keep the drive from turning for the back half of the coupler?