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Author Topic: Flywheel spinning on crankshaft  (Read 2195 times)

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Flywheel spinning on crankshaft
« on: July 07, 2024, 10:09:39 pm »
Has anyone dealt with a flywheel spinning on the crankshaft? There is no set screw or anything I can see that keeps the flywheel from spinning off as I run the engine. I don't want to attempt to put a notch or some sort of embossment on the shaft. Maybe loctite? Seems like that would eventually come loose.
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Re: Flywheel spinning on crankshaft
« Reply #1 on: July 07, 2024, 11:43:20 pm »
Yes, locktite should do it, but I would be sparing with that as you may actually want to remove it someday. Superglue could work too, and it will usually "break" with the application of acetone, so may be a better choice. I prefer Zap-A-Gap as it is supposed to work even if the mating surfaces are a bit oily.
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Re: Flywheel spinning on crankshaft
« Reply #2 on: July 08, 2024, 07:03:41 pm »
I use Bearing retaining compound.....it wont move again, but gentle heat will release it if you need to remove the flywheel.
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Re: Flywheel spinning on crankshaft
« Reply #3 on: July 09, 2024, 11:27:33 am »
Quote from: Jim on July 08, 2024, 07:03:41 pm
I use Bearing retaining compound.....it wont move again, but gentle heat will release it if you need to remove the flywheel.

Gentle heat is the key word here to be sure, as that old Doll flywheel is probably made from some form of Zinc alloy like Zamak (Mazak in UK) that probably has a very low melting point!
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Re: Flywheel spinning on crankshaft
« Reply #4 on: July 09, 2024, 01:01:11 pm »
Zap-a-gap is also my favorite and works great
Arnold :D
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Re: Flywheel spinning on crankshaft
« Reply #5 on: July 10, 2024, 01:09:11 pm »
Can zap-a-gap be removed in case I want to remove the flywheel down the road?
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Re: Flywheel spinning on crankshaft
« Reply #6 on: July 10, 2024, 02:35:28 pm »
Yes, either acetone or heat will work on it, but as mentioned above, be really careful of using heat.

Also, I'd recommend the smallest fraction of a drop that you can get between the flywheel hub and the shaft .... as the old Brylcreem ad used to say:

"A little dab will do ya"!!!
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