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  1. #1
    yamaha12's Avatar
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    1999 GP1200 Fuel Economy

    I just bought a 1999 GP1200 no power valves-needed a crank bearing and sleeved all three holes with new pistons. She runs great! I am just curious what some other owners get for fuel mileage. I've owned a lot of different skis and I know that none of the carbed get too great of mileage but I somehow think it should be a little less thirsty, even though I ride it pretty hard! I only averaged about 3.5 mpg-no passengers and not towing anything. I'm not too concerned about it. The plugs all come out a nice brown and it doesn't miss a beat-I'm just curious as to what everybody else is getting for mileage.


  2. #2
    Moderator OsideBill's Avatar
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    This one is a beast on fuel, I get better mileage with my GPR and it has a bigger more powerful motor.

  3. #3

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    I had a 98 Gp and my current 01 GPR at the same time, and the 98 used almost 40% more fuel when riding them together side by side. Part of it has to be the power valves improve efficiency.

  4. #4
    cmgww's Avatar
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    LT1GMC is right...the older (pre-2000) motors sucked gas. PVs were a big reason the fuel economy got better...but I've heard of modded 1200-1300 GPRs without PVs that still get better efficiency than the older 1200 motors...(1999 and older).

  5. #5
    icky002's Avatar
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    Regarding the powervalves and their direct link on fuel efficiency I don't know.

    I think I remember seeing that the non-powervalve GPRs use less fuel at WOT than powervalved ones according to the Yamaha manuals. Throughout the entire range... who knows.

  6. #6

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    Having owned gp1200 ,gpr 1200 and gpr 1300 and ridden all these skis for years and tracking fuel milage this is what I have found to be the BEST MPG you can get from each under ideal ridding conditions 35-45 mph calm water, GP 1200= 4.0 tp 4.5 mpg, GPR 1200 = 5.0 to 5.5 mpg, gpr 1300 (efi) = 5.5 to 6.0 mpg , all skis were using a after market ride plate set for the least amount of hull drag possible, Tommy Jordan

  7. #7
    Yep, have had 3 and all guzzled the fuel

  8. #8

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    on my 97 and my bros 99, I can hit the fuel buzzer right around an hour into riding. That is cruising at full throttle for 75 % of the time. I'd say about 11-12 gallons an hour on a 13 gallon tank....never measured mileage cuz it is technically off due to the incorrect speedo. Unless of course you are GPS'ing. My speedo wheel quit working and had a bad wobble to it so i took it off.

  9. #9
    yamaha12's Avatar
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    Ya-I was using the odometer which I know isn't very accurate.

  10. #10
    Yamaha artisan Cutlass's Avatar
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    My GP uses about as much gas as the Mercruiser 454 in my previous boat.

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