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How to nfind a gear ratio ?

I have a 1990 Mercury Blackmax 150, it is a V6 and has a 4 3/4 in bullet 25in shaft which is frozen. I can't turn it to see what the gear ratio might be, is there another way to determine.?
Gary

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Count the number of teeth on each gear and divide. Example: If gear (a) has 60 teeth and gear (b) has 20 teeth, then the gear ratio is 3:1. Hope this helps.

Posted on Jul 21, 2009

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