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			I'll perpetuate the thread hijack.I've not yet changed the prop but the 150 horse on mine  only turns 5100rpm and does 44mph with a 19" on it.
 I've got a 17" that I'm gonna try and see if I can improve the rpms, not expecting more mph but hoping for more mpg.
 
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'75 Cuddy with '00 Johnson Ocean Pro 150 horse
 
Benny
 
 
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