Should I Drain Or Siphon The Gas Out?
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Thread: Should I Drain Or Siphon The Gas Out?

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    Junior Member ATTHECROSS's Avatar
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    Should I Drain Or Siphon The Gas Out?

    Hello everyone. My TW has almost a full tank of gas in it from when I filled it up about 5 months ago. I start it up every week and ride a little bit but at the great mpg that these things get I still have a lot left in the tank. I don't have the opportunity to ride as much as I would like. Hopefully that will change if I am able to move next year. Anyway... I know that I need to get the fuel out so that it doesn't cause problems so my question is should I siphon the gas out or drain it? Can you even drain the fuel on the TW's? Thanks for the help!
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    Senior Member Badgerflorida's Avatar
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    Clamp the fuel line from the tank to the carb. Move the bottom end of the tube to a gas can. Unclamp

    Make sure to move petcock to Reserve too.
    Last edited by Badgerflorida; 10-31-2017 at 09:01 PM.
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    Ken
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    Senior Member Ken's Avatar
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    Just put a longer fuel hose on the petcock, run it into a gas can, turn the petcock to reserve and let it flow into the gas can. Taking the gas cap off may let the fuel flow a little faster.
    There is a guy on utube who says gas doesn't go bad. He drains it then filters it with (cowboy shirts) he strains all floating particles out then dumps it back in and runs it. Do this at your own risk. I have done something similar with old gas but I use an additive and run it through diluted down with newer gas.

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    Senior Member RockyTFS's Avatar
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    Neither siphoning nor draining will get ALL the fuel out.

    If you have ethanol gas in your tank, you do need to drain it and the float bowl. 5 months is a long time for ethanol gas! The only way to get ALL the gas out of the tank is to remove it, empty it upside down, then remove the petcock and complete the draining process, turning it to the left to get out the trapped gas in the right side. If you rinse it with fresh gas, this has the added advantage of cleaning out the inevitable crap that accumulates in the tank and on the filter. I do it every two years. The float bowl can be drained with the little screw at the left side.


    The alternative is to drain the tank via the fuel line (on reserve) and fill it with Non-Ethanol gas....this is good for 6 months.
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    Junior Member ATTHECROSS's Avatar
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    How would I know if I have ethanol gas? I live in Southern California and I think I put 89 octane in it. Is ethanol in all gas?
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    Junior Member ATTHECROSS's Avatar
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    I do have this FUEL MED which is a Yamaha product. Has anyone ever used it? Those who have used it do you like the results? Would this be a good route for me to go or should I still get the fuel out?
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    Senior Member grewen's Avatar
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    https://www.google.ca/url?sa=t&rct=j...nh2CkyDPOR4blS

    check the station where you bought the gas on this list
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  9. #8
    Senior Member grewen's Avatar
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    Quote Originally Posted by ATTHECROSS View Post
    I do have this FUEL MED which is a Yamaha product. Has anyone ever used it? Those who have used it do you like the results? Would this be a good route for me to go or should I still get the fuel out?
    get it out! you've all ready left it in the tank way toooooo long
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    Greg

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    Junior Member ATTHECROSS's Avatar
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    Once I get the fuel out is there an additive or something that I should put in the new fuel to help restore the performance and longevity of the engine and carb?
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  11. #10
    Senior Member Tweaker's Avatar
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    I have the same problem as you all the gas in SoCal has ethanol in it. It affects my outboards, motorcycles and generator, plus small engines, weedwacker, chain saw etc. I have been trying to rotate it out and use it in my truck before it goes bad except for the two stoke stuff which is a problem. I don't want to use that in my fuel injected vechicles. If I had a carburetored engine I would burn the two stroke stuff in that. That Yamaha additive is made for this problem but I don’t know how long it will save the gas. If the gas is already old I wouldn’t use it with that additive it’s too late.

    Quote Originally Posted by ATTHECROSS View Post
    I do have this FUEL MED which is a Yamaha product. Has anyone ever used it? Those who have used it do you like the results? Would this be a good route for me to go or should I still get the fuel out?
    jtomelliott49, maddawgj and Fred like this.
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