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  1. #1
    Marksman

    Premium Member

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    Up and running !!Looking for the mechanical minded for advice for fixing my 4 wheeler

    Greetings to all the good folks out there. I have a Yamaha 2009 Grizzly 400 with low hours that won’t run. It’s never done this before. You turn the key on and the engine just turns over like it’s out of gas or not getting any spark. I checked the fuel line to the engine (I think it has a carberator and not fuel injected . ) and the gas is getting there. I then pulled the plug and checked to see if it sparks and it is plenty sparky. Is there some electrical issue that is not letting the gas get to the cylinder. I’m just trying to check everything until i break down and take it to a shop to fix.
    Last edited by Labeeman; December 27th, 2018 at 04:59 AM.

  2. #2
    Pain is temporary

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    Pull your air filter and see if it starts. When was the last time it ran? Ethanol fuel?
    http://www.dhproject.org/

    Be nice and be courteous, but have a plan to kill everyone you meet.

  3. #3
    Marksman

    User Info Menu

    How long has it sat? If you got ethanol gas in it, with the cold temps you might have a carb full of water and varnish.

  4. #4
    Marksman

    Premium Member

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    It’s been awhile, but not that long. I’ll check it out though. Thanks.

  5. #5
    Marksman

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    First, did you do anything to the vehicle just prior to it stopping? I'll third the air filter thing since it is easiest. Not familiar with the engine itself but it does sound like a carburetor issue. Pull the carb and spray some quick start or carb cleaner into the intake. If it starts then the issue is isolated to the carb; at least 100% of the time with me on small engines. Sometimes it is easier and cheaper to buy a new or re-built carb. Sometimes it is cheaper to rebuild the carb. If you rebuild take a picture of all the linkages and read the instructions 2 or 3 times. Good luck.

  6. #6
    On Target

    Gold Member

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    Your float could be stuck. Lift the front end up and drop it a few times. That may knock it lose. I don't think it's your carb unless you got a piece of crap in one of your jets. If that's the case you will only have to take the float bowl off to get to the jets. While you have it off make sure your floats are moving ok.

  7. #7
    Huh?

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    Make sure the kill switch didn't get bumoed to the off position. Once you're sure it's on pull it over slow or use a compression Guage and ensure it has compression. If that's OK,check for spark. If it has spark, take the filter off, and shoot a little spray choke in there and it should start. If it does then dies, youve got fuel issue.

    Engines are simple machines. You need air (compression), fuel and fire. If you have all three, and the timing is right (rare issue with 4 wheelers but it happens), it will run. Check the above, and post here what happens and we'll go from there.
    SVTFreak




  8. #8
    Huh?

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    Oops. Just saw you have spark.

    OK. Check compression and shoot some spray choke in it and see if it starts. But Def sounds like probably something in the carb. We could talk all day about what it could be, but easier, once proven, to just start at the tank and check and clean everything.

    As someone mentioned, I guess it could be a seriously plugged air filter but id hope you already checked that.
    SVTFreak




  9. #9
    Monolithic Mentor

    User Info Menu

    If you let it sit up with ethanol gas in it and haven't run it in a long time, the fuel could have evaporated and left a film of residue all inside the carb clogging jets and float. Check utube for how to take the carb off and clean inside real well. My honda will do this if I forget to turn the gas off and let it sit with the ethanol "corn" gas in it. After you get it cleaned out and running, only put non ethanol gas in it. Use non chlorinated carb cleaner and take it apart and hose out all the little orifices including the needle valve under the float. You should see carb cleaner going into a hole and coming out another. I have yet to have to put a carb kit in mine.
    Last edited by hunter5567; December 23rd, 2018 at 10:03 PM.

  10. #10
    I despise ARFCOM

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    If as you say it's getting fuel and fire , then it should run . Check the compression . Try the starting fluid routine like suggested .
    I tried being normal once , I didn't like it .

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