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Deltaxstar
11-19-2011, 07:40 PM
Hey guys I'm new to the forum as I am also new to owning a Mastercraft. I just bought my first newer boat. I just sold an 89 sunsetter that I have owned for the last 5 years and it was owned by a family member since new. So I just bought an 08 x-star with the 6.0l. So my question is this. The guy I bought it from said he changed the prop the boat currently has a lot of low end and goes about 35mph at 5000rpm. Me and my wife are not avid wake boarders and I'd like to get some top end back. If somebody knows what the factory prop size is or serial number or something or can tell me what a good one to get it would be much appreciated. I might be wrong about what the top speed of the boat should be with a stock prop as it might only be 42-45mph but it just seems like my boat is all bottom end and takes a while to plane out. Please help out I know nothing about this stuff.

Jerseydave
11-19-2011, 07:59 PM
Welcome deltaxstar! What prop size/pitch are you running right now?

On my '05 X-star with the MCX engine I run an OJ 14.75 X 15.5 for good all around performance. I believe this may be the stock prop for your boat. My top speed is 40-41 and the holeshot is fine with 2000# of ballast plus passengers.

Your 6.0 liter should be a bit quicker and faster than mine, but I doubt you will see 45 mph.

BTW if you're boat is all bottom end with very little top speed it should jump on plane rather quickly. I'm guessing you have a 14.25 X 14 on there now. I sometimes run a 14.25 X 14.5 for extra low end power but 99% of the time I use the 14.75 X 15.5

Eric@OJprops on here can help you dial in your ride.

Oh and post some pics!

Deltaxstar
11-19-2011, 08:32 PM
Yea I am not sure what's on there now how do I measure it? I have another prop he gave me which I'm assuming is the stock prop. If I knew how to measure it I would know. And also if I knew the stock prop size. I'll post a few pics in the general section of the boat. I just got it two days ago and the weather here is already really crappy.

FrankSchwab
11-19-2011, 08:51 PM
Look on the hub face of the prop - the size will be stamped there in very visible letters. If they're hard to decipher, post'em here and you'll get help.

mikeg205
11-19-2011, 08:51 PM
there's a number of websites that help here's one..

http://www.ehow.com/how_5616105_measure-boat-prop.html

+1 on hooking up with OK props... lot's of things to consider when putting on a prop... quick hole shot will eat the high end....at wakeboard speeds the prop you have is the right choice especially when ballasted up....

Deltaxstar
11-20-2011, 06:54 PM
So after taking advice I have found the sizes of the props. The prop currently on the boat is an oj prop 14.25x14 The one I have that I was assuming was a stock prop is also an oj. It says 14.25x14.50. So what one is better top end or should I get a whole different one.

mikeg205
11-20-2011, 06:58 PM
Talk to OJ props - tell them all the spec of your boat and what you want to accomplish - then purchase the prop they tell you to purchase.

Jerseydave
11-20-2011, 07:04 PM
So after taking advice I have found the sizes of the props. The prop currently on the boat is an oj prop 14.25x14 The one I have that I was assuming was a stock prop is also an oj. It says 14.25x14.50. So what one is better top end or should I get a whole different one.

The 2nd one you listed will give you a little more top end but not by much (maybe 38-39 mph). I have that prop as my spare and it's great for extra ballast but not so great for high speed/cruising. Talk to Eric @ OJ and see what he recommends but I would lean toward the 14.75 X 15.5. If you don't care about holeshot at all, get a 13.7 X 17.

Deltaxstar
11-20-2011, 07:20 PM
thanks i will give them a call.

Deltaxstar
11-21-2011, 01:15 AM
What about this prop will it work?
http://sfbay.craigslist.org/scz/boa/2711732471.html

sand2snow22
11-21-2011, 02:38 AM
What about this prop will it work?
http://sfbay.craigslist.org/scz/boa/2711732471.html

That sounds like the last prop JerseyDave mentioned. It will work, but on the X-Star you will gain top end, but lose low end. 14.75 X 15.50 is hard to beat

Thrall
11-21-2011, 01:57 PM
Xstar is a helluva boat for someone who doesn't wakeboard.
Assuming you're on the Delta, so low altitude, the 13.7x17 is about the lowest pitch topend speed prop you could reasonably pull. If you're not loading the boat down and surfing or boarding, it would be what you're looking for to get some more top end speed.
Both the props you have right now are "torque" props. Lots of low end grunt out of the hole and/= higher rpms at a given speed and less top end.
The 13.7x17's are dime a dozen, cheap, because alot of people prop down for more hole shot. The 2 props you have, if in good shape, are some of the more desireable props to have, ie: you could sell them for more $ than a 17 pitch.
I'd get a cheap 17pitch and see if you like it. If not, keep it as a spare or flip it, and gow down to the 15.5 pitch which is sort of a balance between holeshot and top end.
FWIW, if you think it's slow out of the hole currently (you said it takes too long to get on plane) then you won't like a higher pitch.
Also, how do you know you're going 35mph topend? Using a GPS and calibrated the speedo? SPeedo could easily be off a couple mph or more.

agarabaghi
11-21-2011, 02:08 PM
I have a 13.7x17 if your interested to trade props

willyt
11-21-2011, 02:09 PM
I mean... It'd be worth checking out the new 5 blade too

Deltaxstar
11-21-2011, 03:17 PM
I didn't say we won't be wakeboarding just said I dont think we will be filling up ballasts to the max every time we don't really need all that low end and hole shot. But I'm not looking for something that's not gonna make boarding suck or get rid of all my low end I'm trying to find a happy medium between the prop I have now and an all high end prop

jdeml
11-21-2011, 03:27 PM
Since you dont like what you have on there right now Ill buy it from you....Or you can donate it to me hahaha