89 Baretta SuperSport with AQ131d/275 prop question

inside0ut

Seaman
Joined
Sep 3, 2013
Messages
67
I have a AQ131D and a 275 outdrive and the prop is in bad shape. I am looking to get a new prop andwhen I pulled the old one, it says its a 14x17L. In looking for new props, someone suggested I get a 19" pitch. Would this be better than the 17? what would be the best prop to tow a tuber or skier yet still maintain a good top speed?

Thanks!
 

captmello

Captain
Joined
Jun 30, 2008
Messages
3,826
Re: 89 Baretta SuperSport with AQ131d/275 prop question

Its about impossible to pick a prop without starting from a baseline set of numbers. If your current prop is still usable, What numbers are you observing with it? RPM @ WOT, Speed (gps), etc are numbers to start from. FYI, typically, the smaller the pitch, the better hole shot. So for towing, going to a larger pitch, 19", wouldn't necessarily be the right move. But again it depends on where your number are with the current prop.
 

jestor68

Commander
Joined
Jun 12, 2012
Messages
2,308
Re: 89 Baretta SuperSport with AQ131d/275 prop question

Your recommended full throttle rpm range is 4400-4800 rpm. I suspect your gear ratio is about 2.15.

If the engine is operating within that rpm range, with the 14 X 17, stick with that size. If you need to adjust, figure on 150-200 rpm change per inch of pitch change.

For water sports, you want to have the WOT rpm close to the max(4800) for better pulling ability.
 

inside0ut

Seaman
Joined
Sep 3, 2013
Messages
67
Re: 89 Baretta SuperSport with AQ131d/275 prop question

Thanks everyone! As suggested, I think Ill stick with the 14x17. Now to complicate matters worse, should I look at a 4 bladed prop or just stick with 3?
 

jestor68

Commander
Joined
Jun 12, 2012
Messages
2,308
Re: 89 Baretta SuperSport with AQ131d/275 prop question

Thanks everyone! As suggested, I think Ill stick with the 14x17. Now to complicate matters worse, should I look at a 4 bladed prop or just stick with 3?

I would stick with the standard 3 blade Volvo prop.
 

captmello

Captain
Joined
Jun 30, 2008
Messages
3,826
Re: 89 Baretta SuperSport with AQ131d/275 prop question

I would stick with the standard 3 blade Volvo prop.

+1

Look at the Solas amita props. They are an economically priced alternative to the Volvo OEM props. You can also get your old prop fixed, unless its totally shot.
 

inside0ut

Seaman
Joined
Sep 3, 2013
Messages
67
Re: 89 Baretta SuperSport with AQ131d/275 prop question

I will have to buy a new prop. The old one is shot and it looks like it will be cheaper just to buy a new one. Thanks again!
 
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