Help with frozen clutch

[GoKart800]

Hello, I am having issues with getting the old clutch off of my McCullough MC49 2 stroke. I have tried everything I could to get it off, but nothing worked. Please help.

 

[cml1of4]

Hello, I am having issues with getting the old clutch off of my McCullough MC49 2 stroke. I have tried everything I could to get it off, but nothing worked. Please help.

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Have you tried heating it up yet? It could be rusted to the crank. Heating it up and smacking it with a hammer should release it. I've also had good luck with a cheap puller from harbor freight.

In the event none of that work, get an angle grinder and cut it off. You'll want to be careful and not hit the crank.

 

[Rat]

Hello, I am having issues with getting the old clutch off of my McCullough MC49 2 stroke. I have tried everything I could to get it off, but nothing worked. Please help.

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I'm sure you're smart enough to have loosened that set screw in pic 3.

If you're trying to remove it without damage Id have to suggest removing the set screw entirely and saturate it as much as possible with some PB Blaster or other quality penatrating oil and let it sit for a bit.

Put a 2×4 across the shaft end and smack it fairly a couple times to push it further towards the engine, this will separate the key from the clutch, and the clutch from the shaft, it should come off quite easily after that

 

[GoKart800]

I have actually tried the 2x4 method and it did not work. It doesn’t help that the set screws are not only seized, but they are stripped too.

 

[GoKart800]

Have you tried heating it up yet? It could be rusted to the crank. Heating it up and smacking it with a hammer should release it. I've also had good luck with a cheap puller from harbor freight.

In the event none of that work, get an angle grinder and cut it off. You'll want to be careful and not hit the crank.

I haven’t tried heat yet, how do you think I should go about doing that? My last resort is cutting it, and I plan on getting a wheel puller in the next few days.

 

[Rat]

I have actually tried the 2x4 method and it did not work. It doesn’t help that the set screws are not only seized, but they are stripped too.

You may need to drill them out then, I recommend using counterclockwise bits though. If they generate enough heat and snag the bit it will back them out for you which would be better than having to retap threads a size up.

I haven’t tried heat yet, how do you think I should go about doing that? My last resort is cutting it, and I plan on getting a wheel puller in the next few days.

Heat it from underneath where the set screws are and see if thermal expansion works it's magic kicking the set screws loose.