I Can NOT get my coupler off!!

[munki63]

I have tried chain grips, pipe wrench, heat... man strength.... i cant even budge it!!!

HELP!

 

[Waternut]

On the engine or midshaft? Use a propane torch on the coupler only and apply it quickly. The coupler is made of aluminum and the crank or midshaft is made of steel. The coupler will expand faster than the crank and this reduces the friction between the two. If that doesn't work, put the piece outside or in the freezer if just the midshaft and after a few hours, torch the coupler again for that additional temperature variance.

 

[munki63]

Midshaft, not sure how im going to do the engine yet

 

[Waternut]

I tried a bunch of stuff to prevent damage to the midshaft and ended up just clamping some vice grips as hard as possible on it and hammering on the coupler. Obviously I didn't care about the old coupler but it worked like a charm. Rope down the spark plug hole works like a charm getting the coupler off the engine.

 

[munki63]

thanks ill try that...when my hand isnt so dam sore from the first 8 attempts

 

[Liquid Graffix]

http://www.hotproductsusa.com

A good tool to have in your box next to your impact wrench

 

[THRUST]

flatten 2 sides of the raised area on the midshaft to hold it like a bolt .
then run a breaker bar inbetween the teeth on the coupler after heating like mentioned before and it will come loose if not give a few taps on one tooth with hammer to help free it up then repeat

 

[Liquid Graffix]

run a breaker bar inbetween the teeth on the coupler after heating like mentioned before and it will come loose

a helpful idea, but... you run the risk of breaking the teeth... just so you know :-/

heat is your friend!

 

[GIL]

And it takes ALOT more heat than you would think!!! I have a propane torch about the size of a 1 liter bottle and I had to heat for 15 minutes and it then spun off real easy.

The 1st 2 I ever did I heated for 10 minutes and was about to break the housing, the 15 minutes of heat is where it's at!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

[Liquid Graffix]

When you do finally get it off, make sure you use anti seize on the threads when you put it back together so you don't have this problem the next time around.

 

[wsuwrhr]

When you do finally get it off, make sure you use anti seize on the threads when you put it back together so you don't have this problem the next time around.

Yamaha uses some serious Loctite or similar that is why it is such a pita.

We put it in a lathe chuck and low gear the spindle then use the heat and bar method. It sucks but it works.

I would offer to do it for the guy but geopgraphy is a b itch.

Brian

 

[SurferSmurf]

i used a pipe wrench and padded the teeth of the wrench with a piece of t-shirt. then used a bar on the coupler. worked good, marked the shaft a little from the wrench.

 

[NVJAY775]

Both mine came off relatively easy the other night. That removal tool on an impact is the ultimate. I friend of mine has one and has done a few couplers and it works like a champ with heat.

I pipe wrenched the mid shaft, heated the coupler with mapp gas for under a minute (aimed the flame directly at the center of the coupler) and used another pipe wrench to grab and remove the coupler. The coupler was bent like the rest of the boat, so I didn't care to mess it up. And the coupler on the motor I heated the same, used a cold fusion flywheel tool, and a pipe wrench on the coupler to remove it.

They both took some muscle. Maybe the extra heat from the mapp gas helped? It was literally smoking hot in under a minute. I was worried to heat it any more.

 

[Waternut]

If you heat the coupler for more than a minute or two, you'll expand the midshaft too much and it'll take much more heat to get that extra expansion between the two. Blast the coupler at the threads and about halfway up the diameter, then back on the threads once more. If you can grip the midshaft and grip the coupler, it'll slide right off unless someone put some sort of glue on it.

 

[Scorn800]

Use map gas not propane to heat

 

[QuickMick]

If your having trouble removing either part of the coupler, your using the wrong tools.

I have an old pump shaft I cut in half and welded on a piece of angle to hold it in my vice. Slip the midshaft on the pump shaft, put a piece of pipe between the fingers of the coupler. Push down to unscrew, works like a charm.

For the crank coupler I attach my flywheel holder tool to the flywheel. Put a piece of pipe between the fingers of the coupler. Push down to unscrew, works like a charm.

 

[Freakrider]

Did ya get it ? X2 impact with coupler tool and heat...don't forget to use anti-seize on the threads during install....

 

[whennotsailing]

mapp gas. I heated mine up today and it broke free with zero effort and a short screwdriver to turn the coupler.

 

[munki63]

Sweet! I got the mid shaft one off just needed more heat like you boys said, now for the motor if I heat too much it will wreck the seals on the block right

 

[Waternut]

I've never heated the coupler on the engine side for fear of wrecking those seals. Rope in the cylinder and crank on it with a steel pipe or 2x4. At least that's how I've done all my motors.