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  Prop for 70 horse Johnson on a 17 montauk

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Author Topic:   Prop for 70 horse Johnson on a 17 montauk
LilSniffWhaler posted 06-27-2002 09:28 AM ET (US)   Profile for LilSniffWhaler   Send Email to LilSniffWhaler  
what is the prop size fr a 70 hp johnson on for a 17 montauk!/? please help
bdb posted 06-27-2002 09:48 AM ET (US)     Profile for bdb  Send Email to bdb     
I'm using a 13.25 x 17. RPMs are at the upper end of the operating range. Seems perfect. It's stainless, but I also have an alum. and it runs out the same.
Bigshot posted 06-27-2002 11:52 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
What year 70? Older ones redlined at 5500. I think 86+ are 6k redlines. If you hit redline or go just above it you can have it double cupped which is good for 200 rpm reduction and = 1" of pitch.

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