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MS200t bogging/stalling on startup

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

  1. Nathan Graff

    Nathan Graff ArboristSite Operative

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    To be clear, are you talking about adding seafoam to the premix gas?
     
  2. cus_deluxe

    cus_deluxe Thats what she said.

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    yes, a little dash of seafoam in your mixed gas wont hurt a thing. not sure it will solve ur problem, but it certainly wont cause ur saw to melt down.
     
  3. Nathan Graff

    Nathan Graff ArboristSite Operative

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    So, the saw started to start normally for a bit, then went back to bogging. It seemed to stop bogging when I pulled the spark arestor screen, but I think more testing is necessary to rule that out. The screen has been burned clean.

    However, I'm not comfortable running the saw without the screen due to how dry it is here on any given day. I'd rather have the screen and drill another exhaust hole, or leave the saw as is.

    I put some seafoam in the gas, and I start it every few days and run it for a bit. Seems to be smoothing out a bit at startup.
     
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  4. dmb2613

    dmb2613 Addicted to ArboristSite

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    I am sure I WILL CATCH SOME GREEF ON THIS, BUT THERE IS NOTHING YOU CAN BUY IN A CAN THAT WILL FIX A CHAINSAW
     
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  5. 68 Buick

    68 Buick ArboristSite Operative

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    I agree with the Mad Professor, I have found a lot of times that the internal mesh captured too much trash and cleaning the mesh out seem to work.
     
  6. Nathan Graff

    Nathan Graff ArboristSite Operative

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    So, I haven't had much time with farming to play with my saw, but a few weeks ago, there was a mess of snow that broke a bunch of trees. I brought out the MS200t, and it ran just fine. It didn't stall, and no other problems with it.

    Dad was surprised how fast that little saw ripped through those apple tree branches.
     
  7. lone wolf

    lone wolf MS 200T King

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    Put that as your Sig!
     
  8. SCHallenger

    SCHallenger ArboristSite Guru

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    +1. Yeah, the 200 rear handle I was talking to you about has had the screen removed. That produces an immediate muff mod with NO drilling of the muff required. After doing that, you will likely have to remove the limiter from the H needle so you can safely & correctly retune to a richer mixture. Mine gained 1K RPM after removing a dirty screen! Made a real efficient screamer out of it!
     
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  9. lone wolf

    lone wolf MS 200T King

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    Yes cold weather is coming so you need to run them a tad richer cut the limiter off the H.
     
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  10. Nathan Graff

    Nathan Graff ArboristSite Operative

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    So, I've been playing with the saw off and on. Today, I pulled the carb, it's a model S61A, cleaned it up, put it back in, and started the saw. After starting and warming up, the first rev went fine, but after that it started to bog. If I feathered the throttle, it worked the next rev or 2, then after that wouldn't get up to speed.

    I'm wondering if it's a crank seal issue.
     
  11. lone wolf

    lone wolf MS 200T King

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    Only way to easily tell is either a new or working carb or a pressure test. Usually its the carb.
     
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  12. Nathan Graff

    Nathan Graff ArboristSite Operative

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    Is there a way to plug off the acc pump on the S61 carbs? Or should I go for the 126 series carbs?
     
  13. lone wolf

    lone wolf MS 200T King

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    126 series is better. Does you carb have an accelerator pump? Send me a pic of the carb.
     
  14. lone wolf

    lone wolf MS 200T King

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  15. lone wolf

    lone wolf MS 200T King

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    If it dont have the plate by the green arrow no pump is there.
     
  16. Nathan Graff

    Nathan Graff ArboristSite Operative

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  17. Gypo Logger

    Gypo Logger Timber Baron

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    Sometimes debris can be caught between the screen in the carb and the metering assembly. Take them both out and hold it up to a light. You should be able to see through clearly.
     
  18. Nathan Graff

    Nathan Graff ArboristSite Operative

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    I did that as well.
     
  19. lone wolf

    lone wolf MS 200T King

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    SEAM and trains like this.
  20. Nathan Graff

    Nathan Graff ArboristSite Operative

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    lone wolf likes this.

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