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  1. #1

    Putting a GP1200 Back together

    I am currently in the process of putting a 98 GP1200 together. Got the hull from a friend that used to buy the skis pull the motors and race them in hydroplanes. I have a few questions the ski. Its been converted to Pre-Mix. I was thinking running 92 octane gas @ 40:1 with Klotz R50. Is that ok ? I was also thinking of having a separate 32 OZ fuel tank with 110 leaded fuel mixed at 32:1 for the primer pump. To give the motor some extra octane and " slippery " stuff on start up.I dont know much about these hulls. Are there any tips and tricks out there for them ? The ski already has some after market parts (Extended nozzle, ride plate , intake grate, seats, and sponsons.)
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  2. #2
    If you're going premix, you could always use the oil tank as your 110 octane tank and just put a three way valve in the line (just like a 'main' and 'reserve' valve). I would not recommend leaded fuel, unless that's your only source of high octane.

  3. #3
    Yamaha artisan Cutlass's Avatar
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    You're overthinking and over complicating this. I think a traditional primer setup is all you need.

  4. #4

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    Quote Originally Posted by Cutlass View Post
    You're overthinking and over complicating this. I think a traditional primer setup is all you need.
    I agree, you will for sure benefit from a primer on the GP, and that Klotz 40:1 is more than enough to suit your needs.

    Also, the hull is stepped, and if you have not got trims tabs, they are a great asset to have and easy to install. They help minimize porpoiseing.

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