Prop '66 Merc 50 hp

iasledder

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Mar 19, 2009
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What do I need dia and pitch for subject motor on 20' pontoon. Presume large dia with low pitch.:confused:
 

Laddies

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Sep 10, 2004
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Re: Prop '66 Merc 50 hp

The dia is pretty much standard but 9" of pitch is about all it will pull, a 16" starcraft of tha era used a 10"
 

iasledder

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Joined
Mar 19, 2009
Messages
21
Re: Prop '66 Merc 50 hp

Not quite clear on your reply. What is the standard diameter? "9" pitch is about maximum it will pull?" Sounds like going for speed, mph, rather than the RPM needed with heavy work load? I prefer the upper end of the RPM range.

Thanks again, I do appreciate your replys.---Jim
 

steelespike

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Apr 26, 2002
Messages
19,069
Re: Prop '66 Merc 50 hp

I don't have specs on the 66 I do believe typical diameter would be about 11 or 12 inches.
But diameter varies with pitch Higher pitch usually diameter decreases lower pitch diameter increases.
 
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