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  1. #1
    sjorge3442's Avatar
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    Raider 760 Fuel Tank Feed Lines Leaking

    So something I noticed the last few weeks is that my Raiders fuel tank is building up some extreme pressure in the tank when its being stored. Its so extreme, that my lines are leaking at the fuel to carb delivery point at the top of the rubber boot. This happens when the fuel selector is on both off or res/on. Any ideas whats going on here? I've been simply pulling the return line off my tank and running a different line out the side of the engine compartment so that it can breathe.

    I know under operation, you want the tank to hold pressure, but I think my tank might be holding too much pressure. Any ideas?


  2. #2
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    there is a system that allows air in and out of the tank, typically an overpriced one way air valve. one opening in when fuel is pumnped out, the other opening out to allow venting of pressure.

    check the fuel system diagram to see what you need to obtain. The valves cannot typically be repaired.

    First stop is to check the vent lines for mud wasp blockage.

    They like that stuff.

  3. #3
    sjorge3442's Avatar
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    Quote Originally Posted by nmpeter View Post
    there is a system that allows air in and out of the tank, typically an overpriced one way air valve. one opening in when fuel is pumnped out, the other opening out to allow venting of pressure.

    check the fuel system diagram to see what you need to obtain. The valves cannot typically be repaired.

    First stop is to check the vent lines for mud wasp blockage.

    They like that stuff.
    Theres only one valve that I'm aware of on the Raiders. This valve let's air in, but not out. I'll have if the actually line was blocked going up out of the hull, wouldn't the tank have issues pressurizing too?

    Sent from my Nexus 6 using Tapatalk

  4. #4
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    looks like the single valve has the dual purpose, vents in ( always) and out ( when 3psi pressure is exceeded)

    http://www.greenhulk.net/forums/showthread.php?t=90149

    pricey bit, EU0-67767-31-00
    CHECK VALVE 1 24.57


    I'd still be checking for mud wasps

  5. #5
    sjorge3442's Avatar
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    Quote Originally Posted by nmpeter View Post
    looks like the single valve has the dual purpose, vents in ( always) and out ( when 3psi pressure is exceeded)

    http://www.greenhulk.net/forums/showthread.php?t=90149

    pricey bit, EU0-67767-31-00
    CHECK VALVE 1 24.57


    I'd still be checking for mud wasps
    Good call! I'll pull the valve off for the winter and properly direct a vent in an appropriate location while I await a new valve when the summerization period begins in the North east in May!

  6. #6
    butterbean_29512's Avatar
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    I wouldn't leave that tank open. If it's open to atmosphere it will promote water buildup. Its best to fix the valve now and be done with it so it can be properly winterized.

  7. #7
    sjorge3442's Avatar
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    Quote Originally Posted by butterbean_29512 View Post
    I wouldn't leave that tank open. If it's open to atmosphere it will promote water buildup. Its best to fix the valve now and be done with it so it can be properly winterized.
    Do you feel the problem is with the valve too? Is there anything else that would cause the lines to leaks like this?

  8. #8
    butterbean_29512's Avatar
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    If the valve sticks it could cause ezcessive pressure.

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