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  #11  
Old 07-09-2013, 11:55 PM
88 PS190 88 PS190 is online now
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Join Date: Aug 2005
Boat: 1988 MC Prostar 190, 351 Ford
Location: Midwest
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I would not CONSIDER 13x13 on a powerslot boat.

The 14X18 moves 18" forward through the water per revolution of the prop - minus slip.

The 13X13 moves 13" forward per rotation - minus slip.

A powerslot is a 1.5:1 transmission, therefore for every 3 turns of the engine the prop turns 2 times. That means a 14X18 moves forwards 36" per 3 turns of engine and the 13X13 moves forwards 26.

Compound that with the fact that a 14X18 should in theory be more efficient (less slip) then you'll have to consider that the 13X13 really won't move the boat forwards through the water like it oughta.

Full truth is as long as the prop has the correct bore for the diameter of the prop, and so long as it is keyed instead of splined you can put it on - might not work very well - or be worth 100$
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  #12  
Old 07-10-2013, 09:28 AM
catamount catamount is offline
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Join Date: Feb 2012
Boat: 1987 ProStar 190
Location: Vermont
Posts: 415
The first thing I did was call Acme. The guy I spoke to was incredibly knowledgeable. Asked me about which model MC I had, which engine, what my elevation was, how many hours on my engine. He recommended either the Acme #275 or #381 (I think... you should call & confirm).

This was my old prop. With a Powerslot, you should have had a 14 x 18 on there originally.





This is the #275 Acme I replaced it with. I have since had to ask my driver to ease into the throttle on deep starts so my arms don't come out of their sockets.



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  #13  
Old 07-10-2013, 11:59 AM
Fishnhunt Fishnhunt is offline
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Join Date: Jul 2013
Boat: 89 prostar 190
Location: East coast
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Acme recommended a 1591. Anyone used one?
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  #14  
Old 07-10-2013, 01:15 PM
catamount catamount is offline
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Boat: 1987 ProStar 190
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http://www.acmemarine.com/prop-list_ski-boat.php

1591: 14 x 16 - .135 cup?

I haven't heard any mention of that prop on this forum before.
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  #15  
Old 07-10-2013, 01:17 PM
svxwilson svxwilson is offline
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Boat: Ski Brendella, Super Comp, 1991, 351 Windsor
Location: Montana
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Acme recommendations are very good. They were spot on for me. I ordered exactly what they recommended. And at 4000ft I was getting 43 mph with 5 people with my 91 super comp. which is what it did at sea level when it was new in 1991. I am happy with the product and recommendations from acme.
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  #16  
Old 07-10-2013, 01:25 PM
catamount catamount is offline
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Boat: 1987 ProStar 190
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Agreed, they know what they're talking about.

Fishnhunt, it would be great if you could give us the reasons Acme recommended a 14 x 16 - .135 so that people looking for a prop in the future can reference this thread.

Thanks.
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  #17  
Old 07-10-2013, 01:35 PM
Fishnhunt Fishnhunt is offline
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Join Date: Jul 2013
Boat: 89 prostar 190
Location: East coast
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I have a 89 prostar 190 with power slot. I told them I pull mostly wakeboarders and usually have 3 to 5 people in the boat avg weight per person is 180 lbs. they felt like this prop would have great low end and acceleration. He asked how often I would run full throttle and how important top speed is to me. He said my top end would be around 44 mph. I asked about the 275 and 381 and he felt like this was the best choice. I hope this helps.
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