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Old 09-29-2015, 09:29 AM
Austinminer Austinminer is offline
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Boat: 2014 Prostar 5.7L
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4 blade VS 3 blade 2014 Prostar

Prostar guys,
So a semi submerged tree branch gave my prop a love tap the other day and dinged a blade on my prop (4 blade). It was not enough to cause and vibration at 36mph or below, but I do feel a slight vibration at higher speeds. There is not enough damage where I feel it absolutely necessary to buy a new prop, however this is a fantastic opportunity to convince the wife that we need a new prop! .

Before making a decision, I have a few questions:
1. Any noticeable differences in wake characteristics between 3 and 4 blade at 36mph? Softer? Harder?
2. Does it really take that much longer for the boat to slow down? (Short lake)
3. How much more top end is available with a 3 blade? 2-3mph?
4. Probably not, but does 3 blade affect tracking through course compared to 4 blade?

Thanks in advance for any input.

2014 Prostar
5.7L
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  #2  
Old 09-29-2015, 05:58 PM
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DooSPX DooSPX is offline
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Boat: 1991 MasterCraft Prostar 190 PowerSlot
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Please call Eric from OJ props. Tell him, what happened, what you want from the the new prop and what boat, motor/trans combo you have. OJ makes the factory props anyway not to mention I promise you, you will NOT find better Customer Support and caring if you are happy with your prop then Eric from OJ. EVER!
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Need a new prop to fit your needs? Call Eric from OJ PROPS 800-359-9730

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  #3  
Old 09-29-2015, 06:53 PM
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mikeg205 mikeg205 is offline
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Boat: 1995 Pro Star 205 5.7 Liter
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all depends what you want to do.. just slalom OJ 3blade or new CNC prop.. as Eric as DooSpx indicates a 4B is nice for doing slalom and some wake board. or you can try an ACME 541 (could be 543) 3B which gets great reviews here...

Depending what you want to do you could even drop a bit in pitch.. but may not gain much...
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Old 09-29-2015, 07:49 PM
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dtm8119 dtm8119 is offline
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Boat: 1994 Prostar 190
Location: Howard Lake, MN
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Here's the list of approved props for tournament boats...which prop did your boat come with?

http://www.usawaterski.org/pages/Tou...ntTowboats.pdf
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Old 09-29-2015, 07:58 PM
jstew jstew is offline
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Boat: 35th anniversary Mastercraft PS 197 #8 of 35 Cadillac LQ9, regretfully sold
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You could also have your prop refurbished if you don't want to buy a new one. I had this done to my 87 PS190 and had no issues with it.
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Old 09-30-2015, 09:45 AM
Austinminer Austinminer is offline
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Join Date: Dec 2014
Boat: 2014 Prostar 5.7L
Location: South central
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I currently have the OJ 13.25x14.5 I will give OJ a call. I am really curious if there is any change to composition on wake between 3 and 4 blade. i.e. softer/harder.
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Old 09-30-2015, 09:52 AM
Ben Ben is offline
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I would also suggest posting on ballofspray. You will likely find many more new Prostar guys there.
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  #8  
Old 10-01-2015, 11:42 AM
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EJ OJPROP EJ OJPROP is offline
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Austin - Replied to your email this morning. As I said, the best review is your review of running the prop options I suggested to see which fits your needs best. The acme suggested is not for the gear ratio in tbe 2014 Prostar.
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  #9  
Old 10-02-2015, 11:38 AM
markchilcutt
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This may not help you with your 5.7. I have a 2014 6.2 that we run at high elevation 5K in Utah. We have found the 4 blade 13.25X14.5 is the best slalom prop. It gives the most forgiving pull in conjunction with zero off. The 3 blade is to responsive with the 6.2 and gives a almost vilolent pull when zero off surgess in the course. I guess the only draw back some might say is a weaker hole shot with the 4 blade. I personally dont feel a weak hole shot and i weigh 185 lbs. The big 6.2 is a beast and gets the job done no problem even with the 4 blade lower elevation prop.
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Old 10-06-2015, 10:46 AM
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gchapman-tt gchapman-tt is offline
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Quote:
Originally Posted by markchilcutt View Post
This may not help you with your 5.7. I have a 2014 6.2 that we run at high elevation 5K in Utah. We have found the 4 blade 13.25X14.5 is the best slalom prop. It gives the most forgiving pull in conjunction with zero off. The 3 blade is to responsive with the 6.2 and gives a almost vilolent pull when zero off surgess in the course. I guess the only draw back some might say is a weaker hole shot with the 4 blade. I personally dont feel a weak hole shot and i weigh 185 lbs. The big 6.2 is a beast and gets the job done no problem even with the 4 blade lower elevation prop.
Mark, I have not found the 3 blade to act as you describe. I have used the 3 blade for slalom on my 6.2L ProStars and would say that the slalom pull was surprisingly nice. Some skiers actually like it better than the 4 blade. Just to make sure, did you change the ZO setting from 4 blade to 3 blade when you tried it? If not , the system gains would have been wrong and acted as you described.
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