Originally Posted by MikeR
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My understanding is that the pulley has a mechanical dampening system built in....not just a simple AL wheel on a steel hub....
I do agree that is sounds like the machinist may be making some kind of error... there have been a few of these reported.
My original 181 had an undersized hole(~.002"-.003")on the steel hub and would not go on the crankshaft... the replacement slipped right on.
Mine was too long and you had to heat the hub in an oven to get it on. There is no way it's flying off.