Prop selection

[derekpfeiffer]

I am new to boating and just purchased an 89 cobalt w/ a 4.3 and alpha one drive. It came w/ two props one is a SS 3 blade that is 14.75 x 17 the other is a 4 blade alluminum that is a 15 x 16 I put my boat on the lake once just to check it out and make sure there were no major problems to take care of...and I had the SS one on it w/ three men in the boat...The boat seemed to have ok hole shot but only topped out at about 33-35mph...i was a little dissapointed but i was definitly running pretty high rpms so i don't think that's the right prop for the boat (and am hopping that there was no prolonged engine damage from the previous owner running that prop)...was wondering if the other one would be any better or not???

was wondering what you guys thought?

Just realized there was a thread for prop questions...sorry guys i'm new to this and can't seem to find how to delete this or move it.

Thanks

 

[Pierutrus]

Re: Prop selection

You should be using a 14.25 X 21 pitch to keep WOT under 5000 rpm.
Also, those props you've got is for watersports/holeshots.
If you wanna go faster, get a 21 pitch.