New Mitsubishi motor won't stay running

Discussion in '2-Stroke Engines' started by r5579, Aug 12, 2008.

  1. r5579

    r5579 Member

    My TL-43 motor is 3 days old and won't stay running today unless you're squeezing the throttle lever.

    It started and ran fine the first 2 days, today took me 30+ minutes to get it to run, and I found that it only runs while you're squeezing the throttle lever, not conducive to "stop & go" through town. (not that I've made it that far yet). I think there are about 5-6 miles on this motor so far, and I've tried to ease onto the throttle, not holding it at any 1 speed, and not maxing it out either.

    I'm running the correct ratio of 2 stroke oil to gas.

    Can anyone help me with this problem?
     

  2. stude13

    stude13 Active Member

    hi 79; what is your choke setting? what happens when you give half choke? will it run at 3/4 or full?
     
  3. r5579

    r5579 Member

    Doesn't seem to matter whether the choke is on or not. If I'm not holding the throttle, the motor dies.
    Is there a idle screw adjustment somewhere?
     
  4. r5579

    r5579 Member

    Please read, surely someone can help.

    My TL-43 motor is 3 days old and won't stay running today unless you're squeezing the throttle lever.

    It started and ran fine the first 2 days, today took me 30+ minutes to get it to run, and I found that it only runs while you're squeezing the throttle lever, not conducive to "stop & go" through town. (not that I've made it that far yet). I think there are about 5-6 miles on this motor so far, and I've tried to ease onto the throttle, not holding it at any 1 speed, and not maxing it out either.

    I'm running the correct ratio of 2 stroke oil to gas.

    Can anyone help me with this problem?
     
  5. Idle screw? (sorry for going Sesame Street but you gotta look at everything)
     
  6. Mountainman

    Mountainman Active Member

    idle screw - yep - that's where we look first.. Your mixture shouldn't be the problem - unless - you have it way, way off. Ride That Thing - Mountainman
     
  7. r5579

    r5579 Member

    I was thinking about that this evening. I just don't know where the idle screw is at on this motor.

    Did get it running about an hour ago. I held the throttle just enough to keep the engine running, but not enough to engage the clutch, dropped the roller onto the tire and rode it up and down the street.

    As long as it's moving I don't have to throttle it, but when I'd stop it would die.
    But after about 2-3 runs up and down the street, it idled fine at a standstill and didn't die (which is a first for today).

    Now maybe I can figure out where the idle screw is at and which direction to turn it.

    I appreciate the responses.
    Thank you.
     
  8. Mountainman

    Mountainman Active Member

    hi r5 - well - sounds like you are slowly on your way - for some big fun !! That idle screw - look to see where the throttle cable makes it's connection at the carb - twist your throttle a few times while you look at the carb - it should be moving back and forth - with your throttle in the off position - look where it's sitting at the carb - should be a screw right there.. Most carbs have two screws - one for throttle - one for gas - if your carb has just one screw that should be the throttle - give it a half a turn in - should do something - if not - try another half a turn until throttle of your MB picks up. Since you are new to this - when turning any screws on a carb - keep track of how many turns in or out you turn - just in case later - you want or need to return to the same place. Ride That Thing - Mountainman
     
  9. mark2yahu

    mark2yahu Member

    If you can upload pictures of the motor from all four sides, we can probably tell you where the idle screw is. Like what Mountainman said, if it's just one screw, you turn it clockwise to increase the idle.
     
  10. SirJakesus

    SirJakesus Guest

    Looking at the motor from the label side it's on the top left corner of the carb. There is a housing surrounding it and the throttle assembly. All you have to do is get in there with a medium sized screw driver and turn it clockwise a bit. I usually do this while the engine is running just a quarter or half turn at a time until the engine runs smoothly but doesn't come anywhere close to engaging the clutch. It's Phillips head I believe. Shouldn't be a hard fix. You can also see the screw if you look directly down from the top of the carb into the opening where the cable attaches and operates the throttle. Make sure your gas cap is on tight too the engine is fed by pressure down one tube into the tank so if the cap is loose you'll starve the engine. You'll love that little engine once it's adjusted properly. I believe it to be perfect for MB application.
     
  11. r5579

    r5579 Member

    I finally got it to run last night, even rode it up and down the street a few times.
    This morning, won't start again.

    This afternoon I got it running.
    Had to hold the throttle lever in while I pull started it. Blew out some white smoke for the first 5-10 seconds.
    Then ran fine for about 20 minutes, and died again.

    Let it sit for about 10-15 minutes, and started it again, no real problem.

    Riding it home and it died every 30 seconds-2 minutes. Some of the time it would run (idle) unless the choke was on fully, but then it wouldn't "run" with any power to push me.

    I don't know much of anything about motors, so if you can help, that would be great.
    Thank you.
     
  12. r5579

    r5579 Member

    The 1 page of instructions that came with the kit says 40:1 fuel (which I'm running). The internet site says 32:1.


    I finally got it to run last night, even rode it up and down the street a few times.
    This morning, won't start again.

    This afternoon I got it running.
    Had to hold the throttle lever in while I pull started it. Blew out some white smoke for the first 5-10 seconds.
    Then ran fine for about 20 minutes, and died again.

    Let it sit for about 10-15 minutes, and started it again, no real problem.

    Riding it home and it died every 30 seconds-2 minutes. Some of the time it would run (idle) unless the choke was on fully, but then it wouldn't "run" with any power to push me.

    I don't know much of anything about motors, so if you can help, that would be great.
    Thank you.
     
  13. jg767

    jg767 Member

    There is a set screw to adjust the idle speed, just pull the intake cover to get at it, located just past the end of the throttle cable. Try turning clockwise a turn at atime, and make sure there are no obstructions with the choke mechanism when you put the cover back. Good luck!
     
  14. jg767

    jg767 Member

    BTW, you can run it with the cover off, you can choke it with your thumb over the intake if needed. Hope this helps.
     
  15. kerf

    kerf Guest

    Do you have the Mitsubishi TLE43 or the Chinese motor. The TLE43 has no mixture adjustments, the Chinese, I don't know.
     
  16. r5579

    r5579 Member

    The Mitsubishi motor.
     
  17. kerf

    kerf Guest

    This engine should have a two barrel carburetor with non adjustable jets. To be sure, remove the air cleaner cover and look into the carb. There should be two inlet ports and no mixture adjustment screws.

    Does it have the stock under mounted fuel tank or a larger remote tank? Will the engine run with the fuel cap loosened?
     
  18. r5579

    r5579 Member

    I had the air cover off of it yesterday because fuel was dripping (slowly) from the air cleaner cover.
    There were 2 ports, and I didn't notice any screws in that area.
    I have the undermounted 30 oz tank.
    Haven't tried running it with the gas lid loosened, but I'll do that.
     
  19. r5579

    r5579 Member

    Can't get it started to tell you if it would run with the gas cap loosened or not.
     
  20. kerf

    kerf Guest

    Have you pulled the plug to see if the engine is flooded. Fuel leaking from the air cleaner is not a good thing. If the plug is dry, try putting a couple of drops of fuel directly into the plug hole and see if it will start. Are you using a remote kill switch, if so, disconnect and try again.
     
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