help choosing Prop as I have no idea

[Colliemcc]

I have a glastron Sx 175 with a volvo penta 4.3 GL-D with an sx outdrive.
It is a 17 foot bowrider that we manily use for sking tubing and wake boarding.
I cant get any markings of the old prop.

my wot is 4500 Rpm
at a speed of 55mph
when wakeboarding we normally cruise at 3000 Rpm

Any help would be appreciated

 

[steelespike]

Re: help choosing Prop as I have no idea

Did you check under the prop nut?
If you can't find numbers a prop shop can help you out.
They also may be able to repair it.
If your replacing the prop now is the time to try to solve any issues you may have.

 

[Colliemcc]

Re: help choosing Prop as I have no idea

I found it its 14 x 21
will this be best to use the same size again, or can someone recommend me a better one please if they think it may be better.

 

[bnicov]

Re: help choosing Prop as I have no idea

What you've got is pretty much bang on for your boat. The only thing you might consider is a stainless steel prop but they are pretty spendy and not a good idea if there are many rocky shoals where you normally boat.

 

[steelespike]

Re: help choosing Prop as I have no idea

I found it its 14 x 21
will this be best to use the same size again, or can someone recommend me a better one please if they think it may be better.

If your happy with the performance stick with it.
If you have any issues describe them to us and we may be able to help with a solution.
Slow hole shot? struggling to maintain wakeboard speed? Ventilation(cavitation)?