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  1. #1

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    speedster gas gage

    does anyone know how the gas gage works? I think the bars drop once I reach 1/2 a tank but not sure. Thanks


  2. #2
    TheElite0ne's Avatar
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    Quote Originally Posted by john12 View Post
    does anyone know how the gas gage works? I think the bars drop once I reach 1/2 a tank but not sure. Thanks
    Mine is so inaccurate. I once burned 10gals of fuel and it said I still had a full tank.

    If I know i'm going to go on a long haul I just use my GPS mileage to determine how far I can go. Under normal conditions a full tank of fuel will get you about 85miles.

    Other then that I just learned to always top off before I go out.

  3. #3
    Your probably correct with the fuel useage, I ran a 70+ river run and the gauge said empty but the tank still had 3 to 4 gals left in it. And it always reads full for the 1st 20 miles or so.

  4. #4
    Tampa SeaDoo Crew TampaSpeedster's Avatar
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    It follows the laws of exponential decay where in this graph T=4.5 is essentially a 1/2 tank of fuel:


  5. #5
    You lost me on the graph thing. How does your boat run with the x charger and the 42 lb injectors and intake, is that all you have done?

  6. #6
    Tampa SeaDoo Crew TampaSpeedster's Avatar
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    Quote Originally Posted by Tom V View Post
    You lost me on the graph thing. How does your boat run with the x charger and the 42 lb injectors and intake, is that all you have done?
    Haha, I was just joking about how when the gauge reads 1/2 a tank, you really only have about 20% left.

    Ya, all I have is Xcharger, intake, 42lb'ers and a prop. The boat runs awesome... wayyyy better than stock - definitely how it should have come from the factory. We recently took a trip and noticed a very slight decrease in fuel usage, this could be due to cruising at a given speed now needs less RPM, and as long as you're not cruising in boost (>6000rpm) that should be more efficient.

  7. #7
    Sounds great, I would like to make those changes to my boat also. Did you change the intake grate.

  8. #8
    Tampa SeaDoo Crew TampaSpeedster's Avatar
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    Quote Originally Posted by Tom V View Post
    Sounds great, I would like to make those changes to my boat also. Did you change the intake grate.
    I edited my post above, I meant to say I saw a slight DECREASE in fuel usage, probably due to less RPM's needed to cruise at a given MPH -- as long as you're not in boost.

    I do have an RXPX intake grate ready to go on, I'm not expecting much though, maybe just some better handling and less cavitation in the chop.

  9. #9
    Let me know how it works out, that will be my next item to install.
    Thanks, Tom

  10. #10

    Join Date
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    so the gas gage,the speedo, and the HR meter are all off how do i no if the RPM are allways working right. is it the same with the 2010 boats?

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