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Old 09-13-2012, 10:28 PM
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Just bought an OJ prop

I just purchased an OJ 13x13 4 blade prop for my 94 prostar 205 off ebay. It will not get here until next week and hopefully I will be able to put it on and try it out. I am not sure how much difference I will be able to see until I get the ballast bags set up. Does anyone that has this setup have any good info as far as noticeable differences?
Should it have a better low end?
How much top end do i sacrifice (not too concerned, but curious)?
Will it hold a constant speed better?

I did send an email to Eric Johnson and he said that this will be a very good overall prop, but that is about all I got out of him.
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  #2  
Old 09-14-2012, 01:28 AM
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I have that prop and overall its very good hole shot, no loss of max mph and does hold rpm and mph better than the old 3 blade. But I don't run any ballast so no info on being loaded down.
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Old 09-14-2012, 09:06 AM
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I have the same set up. Moved from a 3 blade. Here are my numbers before and after.

Boat Speed Test:
3 Blade Prop
1st Start = 9.09
2nd Start = 8.5
3rd Start = 8.7
Top Speed = 41.2

New
4 Blade Prop
1st Start = 8.32
2nd Start = 8.0
Top Speed = 40.8

Of course this was not professionally done. Loading on trailer is better too.

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Last edited by Double D; 09-14-2012 at 09:12 AM.
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  #4  
Old 09-14-2012, 10:37 AM
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I just got my new OJ prop this week. Eric suggested 14.75 X 15.5 LC 1 1/8" 4-blad.

All I can say is HOLY HOLE SHOT.

I have a 200V with lots of ballast and it feels like I launched with my old prop (13x13 4 blade OJ) with no weight in the boat at all. Sacrificed top speed but with ballast in I can't go over 32mph anyways or it porpoises to bad.

So in other words I just upgraded to a bigger prop from the one you just bought. The old prop I had was good but this prop takes the cake if you have weight.
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Old 09-14-2012, 10:57 AM
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Quote:
Originally Posted by Traxx822 View Post
I just got my new OJ prop this week. Eric suggested 14.75 X 15.5 LC 1 1/8" 4-blade............
Thats the one I want to get for next season..........
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  #6  
Old 09-14-2012, 11:48 AM
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Quote:
Originally Posted by Traxx822 View Post
I just got my new OJ prop this week. Eric suggested 14.75 X 15.5 LC 1 1/8" 4-blad.

All I can say is HOLY HOLE SHOT.

I have a 200V with lots of ballast and it feels like I launched with my old prop (13x13 4 blade OJ) with no weight in the boat at all. Sacrificed top speed but with ballast in I can't go over 32mph anyways or it porpoises to bad.

So in other words I just upgraded to a bigger prop from the one you just bought. The old prop I had was good but this prop takes the cake if you have weight.
Why would you want to go at a higher speed with ballast? Other than to excessively burn gas.

Quote:
Originally Posted by BrooksfamX2 View Post
Thats the one I want to get for next season..........
I have that on my X-15 with an MCX. As mentioned before, hole shot is nice. However, I'm only using stock ballast. Engine tops out at the upper end of the recommended RPM (4800) at WOT. I have a spare of the same so if we end up at Shasta at the same time again next year you can demo mine if you want.
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  #7  
Old 09-14-2012, 01:48 PM
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Quote:
Originally Posted by GoneBoatN View Post
I have that on my X-15 with an MCX. As mentioned before, hole shot is nice. However, I'm only using stock ballast. Engine tops out at the upper end of the recommended RPM (4800) at WOT. I have a spare of the same so if we end up at Shasta at the same time again next year you can demo mine if you want.
Thanks for the offer. I currently have a 13.7x15.5 (came with boat) and it works OK. I have not hit the rev limiter, but can easily run 5000 rpm plus.

I dont cruise with ballast full. Like at Shasta we cruise to our spot, fill, play, empty, cruise back.....

We are there same time next year.
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Last edited by BrooksfamX2; 09-18-2012 at 01:59 PM.
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  #8  
Old 09-14-2012, 12:20 PM
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Well Eric also told me that If I plan on adding more than 2000 lbs of ballast he would suggest the 13 X 11 LC 1" XMP 3-blade. I believe Acme recommended a 13x 12 4 blade prop.

Thanks DoubleD for the numbers.
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  #9  
Old 09-14-2012, 02:08 PM
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Quote:
Originally Posted by CC2MC View Post
Well Eric also told me that If I plan on adding more than 2000 lbs of ballast he would suggest the 13 X 11 LC 1" XMP 3-blade. I believe Acme recommended a 13x 12 4 blade prop.

Thanks DoubleD for the numbers.
I figured there was a reason Eric recommended that prop.
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  #10  
Old 09-18-2012, 11:41 AM
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I got the prop yesterday and I decided to polish it up a little bit. You have to love Mothers Metal Polish. It still needs a little work to be nice and shiny, but then again who will really see the thing? I found out my neighbor also has a prop puller for his SN that he will let me borrow, so that is one less thing for me to have to purchase. It is nice having a neighbor with that same interests as me, even though he is nearly 20years my senior.
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