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Old 03-27-2011, 04:51 PM
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Moving Boat to High Altitude Lake

I am moving my 2008 X-2 Saltwater Series from Sea Level to Lake Tahoe which is about 6300 ft. What should I do to make sure that it will run smooth once it gets out here?
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Old 03-27-2011, 05:12 PM
starrski starrski is offline
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Join Date: Aug 2007
Boat: Mastercraft, X14, 2008, wish I still had my '97prostar 205
Location: Eastern WA
Posts: 39
I have taken my '08 X-14 from sea level to Park City UT at 5000 feet with no operational issues. The ECM adjusts air-fuel mixture automatically. I make sure I run premium fuel as HP decreases at altitude.

We ski with a family that brings a CSX from Phoenix to Lake Powell for five years with no issues. This is a 600' to 4,000' elevation change.

You may need to check on invasive species inspection requirements as a lot of states implemented new laws the last two years. I have to be inspected everytime I go from WA to ID or to any National Recreation Area like Lake Powell.

Last fall I got a lot of new questions about how I maintain my permanent ballast tanks to make sure I have no milofoil weeds, mussels, etc. at both Lake Powell and the Idaho border crossing inspections. I know our boating friends also had questions on maintenance of their live wells, which were visually inspected.
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Old 03-27-2011, 06:04 PM
seth25 seth25 is offline
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Join Date: Mar 2010
Boat: 2009 X2
Location: Rocky Mtns.
Posts: 501
You will need to change to different pitch propeller to account for the loss of engine power at high altitude.

This is the only change that I know of bringing a late model boat up to high altitude.
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Old 03-27-2011, 11:20 PM
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Thrall Thrall is offline
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Join Date: Jul 2004
Boat: '06 X2 MCX
Location: Black Diamond, WA
Posts: 4,603
What engine? MCX? I think the 08 MCX X2's came with a 15.5" pitch prop. It will be lacking some at altitude. Not as bad as the 17 pitch on my 06 X2 though. That thing lost alomst 1000rpms at 6500-7000'. I propped down to a 14.5x14.25 ACME and the difference was night and day. Good hole shot now, got all my rpms back and still get 41-42mph on flat water.
Other than that it will run fine at altitude.
'06 X2 MCX

"I understand why some people may not want to do this the way I have recommended but I can't understand the death grip some people have on a toilet plunger with a hose fitting." -JimN
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Old 03-27-2011, 11:49 PM
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Cmpdman Cmpdman is offline
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Join Date: Feb 2011
Boat: MC
Location: Mountain West
Posts: 535
We boat at 5900'. x45. We use 14.5x14.25 and reach 5100 rpm. Think the EMC will adjust the fuel/air mixture for you. Just re-prop and you should be good.
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Old 03-28-2011, 06:22 AM
EJ OJPROP's Avatar
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Join Date: Mar 2005
Location: East Tennessee
Posts: 772
I would suggest at least a 14.25 X 14, maybe even the 14.75 X 13 depending on how much ballast you typically run.
Eric Johnson
Johnson Propeller Co., Inc
[email protected]

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altitude, tahoe, x-2

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