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Old     (alcarlaw1)      Join Date: Jun 2007       10-13-2013, 10:52 AM Reply   
I need to recondition the prop on my Star. The current prop is a 13.7 x 17 OJ 4 blade. I have no idea what the numbers mean or translate to in the real world but I've never seen anybody with this prop size on any of the WW forum threads so that leads me to believe it may not be the right prop. We have around 2000lbs ballast in the boat and I can't see us adding any more. Both boarding and surfing,. Any suggestions welcome, should I keep the prop (doesn't cost much to recondition) or am I going to get better performance and economy if I change for a different size?
Old     (xstarrider)      Join Date: Jun 2007       10-13-2013, 6:23 PM Reply   
Hands down there is not a better prop for boarding on the 205v hull/XStar/x1 than the Acme 1235. Thing pushes all the weight that boat can handle and planes it no problem. U have the tapered shaft so the 1235 is the number. For those with the splined shaft I don't recall the exact number but 1239 rings a bell.

OJ has a similar prop but I notice a difference and prefer the Acme

Last edited by xstarrider; 10-13-2013 at 6:26 PM.
Old     (ironj32)      Join Date: Jan 2007       10-13-2013, 6:24 PM Reply   
Yep, Acme 1235.
Old     (LYNRDSKYNRD)      Join Date: Sep 2012       10-13-2013, 6:41 PM Reply   
I've got a lightly used 1235 that I would sell if you are interested.

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Old     (Pad1Tai)      Join Date: Jan 2013       10-13-2013, 7:12 PM Reply   
The 1235 or 1273 will work perfect... Remember yours should be a splined 1 1/8 L/H prop..
Old     (xstarrider)      Join Date: Jun 2007       10-13-2013, 8:59 PM Reply   
Being his is a 2000 it is A 1 1/8 tapered shaft. Not a splined one.
Old     (alcarlaw1)      Join Date: Jun 2007       10-14-2013, 2:24 AM Reply   
thanks guy. Yes it's an 1 1/8 taper shaft. So going from the 13.7x17 to 14.5x14.25, how much would I expect the rpm to increase at say 22mph? I have not had any issues holding speed with the 17, but that said I am just dialling the boat in and getting used to it so when weighted up nearer 2000lbs this may be more of an issue. Fuel this side of the pond is expensive, so I dont want a considerable rpm increase for minor gain in holding speed.
Old     (scottb7)      Join Date: Oct 2012       10-14-2013, 12:08 PM Reply
Old     (Pad1Tai)      Join Date: Jan 2013       10-14-2013, 12:11 PM Reply   
Mine went up between 800 - 1000 rpms depending on the weight..
Old     (phillywakeboarder)      Join Date: Sep 2008       10-14-2013, 2:19 PM Reply   
You can't go wrong with the 1235. At riding speed you can expect around a 1000 rpm increase. But, the boat gets on plane so much quicker and requires so much less throttle coming out of turns that it pretty much evens everything out with respect to gas consumption, at least for those who don't have a really long riding spot. The only real downside is the reduction in top speed. If you have any barefooters in your crew they won't be happy.
Old     (jrw160)      Join Date: Oct 2006       10-14-2013, 3:41 PM Reply   
I'm running the OJ 14.25x14.5. I'm typically at 3600rpms at 24mph. It burns 7-8 gallons per hour loaded with 2500-3000lbs plus 4 or 5 people.
Old     (xstarrider)      Join Date: Jun 2007       10-14-2013, 4:02 PM Reply   
So did some testing with my 1235 vs my 13.7 X 17 OJ a while back. Here are some numbers for you

Here are some numbers

Acme 1235
3050rpm. @ 23mph
4200rpm. @ 32mph
4500rpm. @ 34mph
5550 rpm @ wot of 41 mph

Weighted up with 2700.
3300rpm @ 23mph
Holeshot at an unofficial just under 5 seconds to plane

OJ 13.7 X 17
2800rpm @23mph
3700 rpm @ 32mph
4000rpm. @34mph
5100rpm @wot 43.5mph

Weighted with 2700
3000rpm @ 23mph

Holeshot weighted at an unofficial 6 seconds to plane.

As mentioned I don't notice a difference at all in fuel between the props on a wakeboarding day. However if I ski or cruise down and around a bigger lake with the 1235 it does suck fuel way more. However the hole shot with weight from the 1235 is worth the ocassional extra fuel when I head to other lakes.

Last edited by xstarrider; 10-14-2013 at 4:09 PM.
Old     (kainishida)      Join Date: Feb 2003       10-14-2013, 7:34 PM Reply   
Swatguy, awesome numbers. Are you running 750's in the rear lockers? Currently I have 550's in the rear and was curious if anyone was running 750's or if they fit.

Last edited by kainishida; 10-14-2013 at 7:35 PM. Reason: spelling
Old     (phillywakeboarder)      Join Date: Sep 2008       10-14-2013, 8:28 PM Reply   
I started off with the fly high v-drive sacs, which I think are 400 pounds each, and then switched to the 750s. The 750s fit. The engine dividers bow in when they're full, but it's no big deal. The extra weight that far back makes a big difference.
Old     (xstarrider)      Join Date: Jun 2007       10-14-2013, 9:45 PM Reply   
I run 750's and a ton of people do as well. You just need to reinforce the dividers, more so on the early models. I just ran L channel brackets the length of the divider along the floor to prevent the divider from bowing against the exhaust manifolds and melting. Used stainless screws and bolted it right to the floor. Plenty of room and did the trick for like 20 bucks. Holding string after 1130hrs of use.

The downside of running the 750's in the rear is that you are going to need at least 800 in the nose to balance it out. However the wake will be as macking as any pro would love. I ran the v drive sacs at first. Then have the 750's a shot. Holy cow the wake upgrade was worth every penny going within 750's. Also if you surf at all 750's are a must. Def plenty of room for them to fill all the way.

Last edited by xstarrider; 10-14-2013 at 9:49 PM.
Old     (dvsone79)      Join Date: Dec 2012       10-15-2013, 11:00 AM Reply   
If you get 750s for the back, I'd recommend an 1,100lb bow sac. That hull likes weight up front almost as much as in the back. I have 2 750s in the back of mine, a 350 ski locker sack, and a 750 in the bow walkway. It throws a great wake. However, a buddy with the same hull has the same 750s, same ski locker sac, but runs the 1100 triangle sac in the bow and his wake is noticeably better. Peakier and gives you a better vertical push on wake jumps. You lose the bow seating, but its worth it. No one likes to sit up there anyway.
Old     (kainishida)      Join Date: Feb 2003       10-15-2013, 11:48 AM Reply   
Good info everyone. It's amazing what the right prop can do. Guess I know what I'll be shopping around for this off season...
Old     (xstarrider)      Join Date: Jun 2007       10-15-2013, 2:08 PM Reply   
Lynard sent ya pm.

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