Prop experts, stop here !!!

[duck-n-pond]

Current setup: 1996 Force 50hp, 15' bowrider fiberglass boat (think about 950lbs dry). Existing prop number: 48 816704 A40 13P. This motor, from what I can gather, should top out at 5200-5300 rpm. With my current prop I can get 5800rpm which makes me believe the wrong prop is installed. Can someone recommend a more suitable prop? Will the correct prop increase my speed (only get 29mph now WOT). Can't afford to start experimenting (but I know you guessed this by the motor I'm running), so looking for a real knowledgable person to make a good educated guess, and thats what I will have to go with. Thanks.

 

[VistaMan]

Re: Prop experts, stop here !!!

Those numbers don't add up. Either your RPM is way off or the speed or the pitch. Check out one onf the prop calculators to determine what would be good. Try this one<br /><br /> http://www.hydrostream.org/Prop.htm

 

[LubeDude]

Re: Prop experts, stop here !!!

I think a 15P Stainless will put you were you want to be. Or a 17P Aluminum as long as you stay with the same diamiter. You are going to lose some hole shot though. You probably have a great one now. Keep this prop for pulling skiers or tubes. Or stumps!!

 

[WHITEBOYY32]

Re: Prop experts, stop here !!!

yes i agree a 15 or even a 17 would be better, more top end speed too.

 

[merc200]

Re: Prop experts, stop here !!!

You are only going to increase your speed about 1 mph for every 1" of pitch you rise, if that's what you are looking for. I would go with the 15.......and if you are like me......I can't afford stainless.....so go with the aluminum....it's cheaper to replace if you should nick it on a stump!

 

[duck-n-pond]

Re: Prop experts, stop here !!!

MarkHP, I suspect the prop pitch. Could be error with tach, but I don't think so. If it was way off I would suspect incorrect setup on tach, number of poles or whatever. But I had also verified same. Speed measured with GPS. General concensus seems to be a 15P, so I guess that's what I will be looking for. Also, not only am I not rich, but currently on strike, so no stainless for me! This also cuts back on my trips. Sucks. Thanks to all for answering.