Join Date: Aug 2003
Location: Long Island, NY
Thanked 52 Times in 47 Posts
Rep Power: 13
If there was a nut, it may very well be counter threaded.
The pulleys I have dealt with have either been splined (good) or pressure fit (not so good). If your pulley is splined there will be something to keep it on the shaft. If it is pressure fit there may not be.
Have you looked carefully for a set screw, key, or something else? If you don't have some fastener like that, then it's just pressure fit and heat is your best choice.
My boat came with a belt driver refrigerator. The belt is driven from a pulley mounted on the end of the crank (after the alternator belt). The pulley uses a pressure fit insert. On mine, the insert was worn out. The insert would not come out of the pulley until I applied heat. Then it popped right out.
Deep Blue C, 2002 C&C 110
Mt. Sinai, NY
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