Getting new Prop

scottsims

Cadet
Joined
May 25, 2006
Messages
11
I will be trying out a Rapture 13.25 x 21P out on my 90hp Mercury.<br /><br />What difference will is see from the Black Max 12.75 x 21P that I have on now?
 

walleyehed

Admiral
Joined
Jun 29, 2003
Messages
6,767
Re: Getting new Prop

It could go either way, depending on how the hull responds...you may gain some speed at the same RPM with More lift, or, it could pull the R's down a tad, but keep the same speed, and you may find that you need to raise the engine some with the larger diameter prop and increase both speed and RPM..<br />Let us know what ya get.
 
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