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MS200t bogging/stalling on startup

Discussion in 'Chainsaw' started by Nathan Graff, Aug 26, 2019.

  1. lone wolf

    lone wolf MS 200T King

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    No Accelerator pump on that carb.
     
  2. Nathan Graff

    Nathan Graff ArboristSite Operative

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    I was wondering about that after looking at it again. Still think the carb is the primary suspect? Or should I be looking for seal leaks?
     
  3. lone wolf

    lone wolf MS 200T King

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    Well if you pressure test first then you can proceed to buy a new OEM carb if need be. You have to either pressure test or try a carb what ever is easier for you.
     
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  4. Nathan Graff

    Nathan Graff ArboristSite Operative

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    Are the huayi brand carbs the aftermarket ones that you found good? I found another thread where you talked about it, and you spelled it different, but I cannot find a thing about that brand online. Keeps referring me to Huayi carbs.
     
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  5. lone wolf

    lone wolf MS 200T King

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    They are the best of the aftermarket carbs but you will have trouble finding one. Best to buy OEM now. You could send me that carb and I can tell you if its good.
     
  6. Nathan Graff

    Nathan Graff ArboristSite Operative

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    I might just take you up on sending you the carb to test.

    Currently, I'm digging around in my scrap piles for a block of aluminum to make a pressure tester. I might just make one out of UHMW poly. I don't do much with aluminum.
     
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  7. Gord404

    Gord404 ArboristSite Operative

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    Having a bit of problem fuel related with my rebuilt T200 as well, third carb,- this time it runs great all around except after a 30 second cut, stalls out when it returns to idle and leave it for 30 seconds or so and starts and performs beautiful and does it again after a cut, crankcase vac- press test was 100 percent when I tested it, wonder if the tank breather is a little wonky ???
     
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  8. Nathan Graff

    Nathan Graff ArboristSite Operative

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    I saw a video where the fuel tank oring wasn't sealing right causing a problem similar to what you're experiencing.
     
  9. lone wolf

    lone wolf MS 200T King

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    OEM carb?
     
  10. Gord404

    Gord404 ArboristSite Operative

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    OEM carb - yes
     
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  11. lone wolf

    lone wolf MS 200T King

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    What model 126 by chance maybe it could be an accelerator pump leak??
     
  12. Gord404

    Gord404 ArboristSite Operative

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    will look later- sitting on my bench.... smell gas so I drained the tank last night, might not be holding pressure, will take it off and see what the Mityvac says.- not even sure what the accelerator pump looks like , not familiar with these carbs.
     
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  13. lone wolf

    lone wolf MS 200T King

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    82199BCD-BDEF-4365-A78D-B38132E6A48F.jpeg
    Does it have this plate?
     
  14. lone wolf

    lone wolf MS 200T King

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    Check your impulse line and see if its tight.
     

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