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Thread: wont start

  1. #1 Unhappy wont start 
    Join Date
    May 2007
    Location
    St-Q, N.B.
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    110
    My new baja wont start anymore.
    i ran my first full tank when it was 3/4 empty it started to not run idle.
    it would stall if i let it sit for 5 seconds tried to tune it but couldnt stop the stalling.
    so i put it back to where it was before still not good.
    I have to put trottle at half open to get it started.
    i put a full thank of gas and still nothing it still stalls.
    tried tighting carb and exaust.still no go.
    it started a couple of time after that but now it wont start at all.
    tried setting to factory default 1 1/4 low and 1 1/2 high still wont start.
    can anybody out there give my some pointers would realy apreciate it.
    Im used to tuning chain saw but this little motor is really hard.
    spark look good.
    need help please.

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  2. #2 Default  
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    Real Name
    Mike
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    Here's what I would try first. Change the spark plug (sometimes they can just foul up for no reason. Pull off the fan cover on the engine and check your coil to flywheel gap (if you have to adjust it make it the width of a business card) Also check your gas cap and make sure the vent plug is not plugged up with dirt or whatever. Good luck with it and let us know about your progress!
    Mike

    FG Leopard
    FG Monster Beetle 4x4
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  3. #3 Default  
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    Feb 2007
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    When you play with the low end needle you almost always have to adjust the idle screw (the difficult to get to screw behind the roll bar) have you touched this screw yet?

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  4. #4 Default  
    Join Date
    Apr 2007
    Location
    Victorville, Ca.
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    redo the check list and make sure all is tight, take the plug out to see if it has spark. is the plug wet or dry make sure your air cleaner is clean. air, fuel, spark it should run

    My Baja is faster than yours
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  5. #5 Default  
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    Feb 2007
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    1,195
    try turning your idle screw all the way in... yes I said all the way in! Richen up the low end screw some more. Get it to run in, then when you've got a few more tanks through the motor start to lean out the low end and then re-adjust the low end screw. But always first make sure that you have good spark and that your air gap is set right (the gap between your flywheel and your coil)

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  6. #6 Default  
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    May 2007
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    St-Q, N.B.
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    tried it today after letting it sit all night with spark removed and air filter off to dry out crank case. and I changed oil ratio to 32.1 like some of my chainsaw body suggested.
    and it fired and ran for about 3 to 4 minutes on factory default setting.It idle good.
    I had the idle screw wide open.
    then it stalled and the same problems started had to clean sprak to make it start .
    would only start with trolle half open and cranking like a maniac.
    only runs half to full trottle.
    i put low needle everyware and nothing.
    will have new spark tomorrow hope it works.
    the spark color is black and dirty and it should be brown .
    another question Im running super unleaded with castor mixing oil and was running 25.1 what are you guys running?
    thanks for all your replies, greatly appreciate your help!
    ps I did cheque gas cap and every gasket for sign of leaking thighten every bolt on carb.
    Last edited by tarzan13; 05-16-2007 at 02:40 AM.

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  7. #7 Default  
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    I run 87 octane 40:1 Toro 2 stroke oil
    USA uses a different Octane rating than many countries but 87-89 are close.

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  8. #8 Default  
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    Feb 2007
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    Nuuk, Greenland
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    Try adjusting the high and low needle back to factory Standard.

    Accodng to FG's instruktion, that means Turn them all the way in, and then 1 1/4 turn out for the Idle Mixture and 1 turn out for the High-speed needle.
    (FG Catalog 3, page 130)


    30:1 to 25:1 is fine for Running in. Zenoah recommends 25:1 both for running in and running.

    Happy Racing
    Jesper Rex, Nuuk, Greenland
    FG Leopard Race, 29cc race ported DDM SiKK conversion, Elcon'ized and Sensor'ized
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  9. #9 Default  
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    May 2007
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    St-Q, N.B.
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    Quote Originally Posted by Rex View Post
    Try adjusting the high and low needle back to factory Standard.

    Accodng to FG's instruktion, that means Turn them all the way in, and then 1 1/4 turn out for the Idle Mixture and 1 turn out for the High-speed needle.
    (FG Catalog 3, page 130)


    30:1 to 25:1 is fine for Running in. Zenoah recommends 25:1 both for running in and running.
    that weird they say in owner manual idle 1 1/4 turn and high 1 1/2.
    well im willing to try any thing.
    I live at 1000 feet above sea level can that effect needle adj?

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  10. #10 Default  
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    I find that once the low needle is set at 1 1/4 then you should only need to adjust the larger idle speed screw. That's the way that works best for me. Different altitudes will affect the carb settings a bit, but if you go by the book that's usually a good starting point. Let us know about your progress!

    FG Leopard
    FG Monster Beetle 4x4
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