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  Pitch for 70 hp on a 15'

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Author Topic:   Pitch for 70 hp on a 15'
pist2348 posted 05-12-2001 09:59 AM ET (US)   Profile for pist2348  
I just bought a 70hp Yamaha and with it was a stainless 19" pitch prop. Is that the right pitch for a 15' with a 70?
russellbailey posted 05-14-2001 10:26 AM ET (US)     Profile for russellbailey  Send Email to russellbailey     
Probably. We have a Evinrude 70 on our 15', and use a 19 pitch SST prop from OMC. It works well. I've found better acceleration, even skiing, with the 19 stainless than I did with a 17 aluminum. A 17 stainless might be better for waterskiing, but the 19 stainless works and is in good shape. A 15 pitch is too low - the engine hits max rpm long before running out of power, and a 21 pitch would lug it.
pist2348 posted 05-17-2001 05:41 PM ET (US)     Profile for pist2348    
Thanks for the feedback
pist2348 posted 05-17-2001 10:41 PM ET (US)     Profile for pist2348    
Does anyone have a 21 degree prop on a 15' with a 70hp? If so, how does it perform. I am looking for more top end, then out of the hole.
jimh posted 05-17-2001 11:23 PM ET (US)     Profile for jimh  Send Email to jimh     
Prop pitch numbers are not angular measurements in degrees; they are linear measurements of the distance the propeller would travel in one revolution when acting as a screw.

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