Prop pitch question ss vs alum

F

FZrider

Cadet
Joined
May 26, 2013
Messages
9
Looking to get a viper ss prop to replace the oem aluminum on my '02 Johnson 115. Running a 13 1/4" x 17p RPM's are at 5900-6000. Tried a 19p alum and had 5500 but hole shot was terrible. Similar top speed (43 on GPS) with both. Question is will the rpm be the same with ss prop? Worried about the 5900-6000 rpm with the 17 but not happy with the hole shot of the 19. The viper 17 is slightly larger at 13 7/8". Any thoughts? Thanks!
 
F

FZrider

Cadet
Joined
May 26, 2013
Messages
9
Re: Prop pitch question ss vs alum

Guess I better rephrase the question. Lol. When switching from an aluminum prop to ss of same size and pitch do the RPM's at wot remain the same?
 
WIMUSKY

WIMUSKY

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Sep 26, 2009
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Re: Prop pitch question ss vs alum

I've read that when going to ss you drop pitch. Not sure why. I'm thinking because of the extra weight of the ss. I hope some prop experts weigh in because I want to know too since I'm going to use the AL as a spare and get an SS.
 
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