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  1. #1

    Join Date
    Jan 2006
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    UK
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    Increase fuel capacity of your GP to 70 litres

    This mod wonít make your ski go any faster but it will allow you to go further. I regularly go on 60 to 70 mile runs on the ski and the standard 60 litre fuel tank limits the range so here are 3 ways Iíve increased the carrying capacity of my ski.

    Please note that because this involves the carrying of fuel I can only state what I have done and itís up to you if you do the same.

    To squeeze an extra 3-4 litres of fuel into the standard tank, if you angle the ski on the trailer so that the right hand side of the ski is higher than the left it allows you to fill the tank with an extra 3 Ė 4 litres of fuel as this fills up the air space above where the filler tube entering on the right hand side of the tank. Now this should only be done just before launching the ski and burning off fuel as you are filling the air gap/expansion space normally seen within the tank. Do not do this at the filling station and then drive the ski to the slipway as this will then preasurise the tank too much.

    The next two options involve carrying a 5 litre petrol can in the front compartment. The down side of this is that it reduces the storage carrying capacity of the ski.

    Therefore, the third option involves moving the battery to a similar location to that of the XLTs and the old GPs. For this I made a battery box in Fibreglass as per this picture and mounted the box on the inner floor with stainless steel screws and sealant.

    I then cleaned out all the brackets out of the old battery box and used counter sunk bolts to hold on the electric box. This then allows me to carry a 5 litre fuel can tightly as per this picture.
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  2. #2
    r33pwrd's Avatar
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    the can in the battery box is a pretty good idea but I would look pretty dumb in the middle of the lake trying to take the seat off for extra fuel (most likley would end up in the lake)! Good idea!

  3. #3
    ABBOTT's Avatar
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    Heck i smoke too much on the water. I would be the one that would have the luck of setting the 18+ gallons of fuel on fire as i try to light up. LOL.

    BOOM!! Crayons everywhere.

  4. #4
    big83bronco's Avatar
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    Talking

    but if you paint the extra gas cans with flourescent colrs to match the ski it may act as a flame retardant coating!!

  5. #5
    YudLuz2's Avatar
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    Quote Originally Posted by big83bronco
    but if you paint the extra gas cans with flourescent colrs to match the ski it may act as a flame retardant coating!!

  6. #6
    big83bronco's Avatar
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    Just playin!............

  7. #7
    ABBOTT's Avatar
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  8. #8
    Hydrotoys's Avatar
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    Kev,
    you can fit the 18 gallon gas tank from the XLT1200 into the GPR1200 with a heat gun, and a little work. If you need details, I'll dig out the pictures. It works pretty well, and you don't lose any storage.

    If you have a gp13r, I havent had a chance to investigate the new FI 3 seaters to see if the pickups are the same size as the gp13r. I'm sure it's still doable with the old tank, but would require some ingeniouity on your part... It appears you have that!

  9. #9
    dhoad's Avatar
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    Question

    just thinking out loud here, so no laughing. most of us have switched to premix - what about plumbing the oil tank into gas tank , then fill oil tank with gas, don't know how much this gains you gallon wise, but to my eye the oil tank must be worth 2 gallons or thereabouts.

  10. #10
    big83bronco's Avatar
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    I had a similiar thought a while back, but never took it seriously, and then forgot about it.

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