Mercury 50hp RPM

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Posted by Bill Kener ( on August 31, 2005 at 18:17:55:

I run a 1978 Mercury 50Hp outboard that I would like to replace the prop on. I don't have a tachometer - is there an inexpensive way I can check RPM @ full throttle? Also, how can I determine the pitch of my current prop? Thanx

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