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DTM
09-02-2004, 02:45 PM
Has anyone ever heard of a propeller shaft on a Alpha outdrive having a “fine” thread?

I have a ’87 Z-21 with an Alpha outdrive. I am replacing the propeller and went to use the nut that came with the kit and it does not fit. I had also tried to use a McGuard propeller “lock” and that thread didn’t work either nor a nut that came with a propeller wrench and had the same issue.

Rootsy
09-02-2004, 03:54 PM
yes the thread is a UNF "fine" thread. come to think of it.. i have never really "measured" the pitch but it might be a Superfine...