Prop Recommendations?

[4.3/sx]

I have a 4.3 Volvo, 225 HP and I am installing a 1.50:1 SX outdrive. This is on a 25' boat similar to a Parker boat. What size prop would be a good starting point?

 

[Fishhead-1]

Seems like a lot of boat for a v6. What size engine originally came with the boat?

 

[jerryjerry05]

There a prop section, maybe ask there?
Michigan propeller has a good prop finder service.
​You;ll need the weight , length , width maybe more.

A friend had a 23ft boat similar to the parker.
It had a 125hp Volvo.
With the correct Volvo prop it actually handled really well.

​The friend calls me up and says he's having problems getting on plane and real poor performance.
I check the motor and find nothing.
As I get ready to leave I see a NEW prop on the drive.
I ask when did the trouble start?
He says as soon as I installed the new prop.He didn't bother to tell me that.

​The new prop was an aftermarket and had shorter blades.
Seems the smaller motor needed the wide broad blades from the OEM prop.

 

[Senior B]

I agree with Fish Head that a 25 foot boat is a lot for a V-6 and that gear ratio of 1.50:1 would be typically found on a 5.7 or 7.4. If I had to make a guess on a prop I would start with a 15 pitch and look at performance out of the hole, getting on plane, and full throttle rpm. I would suggest if you could swap the lower unit then 1.97:1 or at most the 1.78:1 would do much better paired with your V-6 on a boat of that size.