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Old 03-04-2013, 09:14 PM
franknelson's Avatar
franknelson franknelson is offline
TT Newbie
Join Date: May 2012
Boat: mastercraft-x-45-8100 vortec l-18
Location: south
Posts: 3
2007 mastercraft x-45 8.1l motor

what size props have you tryed and best results
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Old 03-06-2013, 09:16 AM
jdl xstar's Avatar
jdl xstar jdl xstar is offline
MC Devotee
Join Date: Jul 2008
Boat: none at moment
Location: Southeast
Posts: 1,105
I have an '07 Xstar with the 8.1l and after consulting with OJ props, I switched out the stock prop (13x22) to an OJ 14.5x17.5. Its a great prop for hole shot and cruising. Your boat is slightly heavier so you could also consider the 14.5x15.5 which will have more low end pop but not as much high end. Do a search for Eric at OJ props and call him.
Previous - 2007 X-Star w/ 8.1l
Previous - 2007 X2 w/ MCX
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Old 03-07-2013, 12:40 AM
prostar205's Avatar
prostar205 prostar205 is offline
MC Devotee
Join Date: Aug 2004
Boat: 2002, X30, L-18
Location: Bothell, WA
Posts: 1,767
I have an '02 X-30 with the L18. The stock prop was a SS 14 x 18. I'm now running an OJ XMP 13.5 x 17. It works great.
2002, X30, L-18, Red Metal Flake (the possessed boat)
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Old 04-09-2013, 09:58 AM
x-swagger x-swagger is offline
TT Enthusiast
Join Date: Jul 2009
Boat: Mastercraft X-45, 2007, 496 8.1 L18
Location: southwest
Posts: 220
Hey Frank,
I have the same year, boat and engine. I have found overall the 14.75 X 15.5 will be the best way to go. I usually am at altitudes from 3000-6000, and the cruising speed is typically around 26mph, with plenty of power out of the hole when loaded down as well.
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