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MS250 checkup

Discussion in 'Chainsaws' started by davidwyby, Jan 13, 2023.

  1. davidwyby

    davidwyby Desert beaver GoldMember

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    Need to replace the spur on an Ms250 and want to make sure the rest is in good health. Are there known Achilles heels on these? Not familiar with them or stihls in general.
    Thanks
     
  2. Stevetheboatguy

    Stevetheboatguy mountain dew and ibuprofen please

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    I seem to always be replacing fuel lines on those. They tend to rot rather quickly. Other than that they are a pretty solid machine.


    Steven
     
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  3. Chainmale

    Chainmale Well-Known OPE Member GoldMember

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    Impulse hoses can pop off from Time to time, especially if buffers need replacing
     
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  4. drf256

    drf256 Dr. Richard Cranium (“RC” to Muh pals) GoldMember

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    The ground wire is a common issue also.

    They are surprisingly good little clammy’s.
     
  5. Dustin4185

    Dustin4185 Pinnacle OPE Member

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    I know where one is in a retention pond in east TN if you need parts, lol. It was way before I got into fiddling with saws and that thing wouldn’t hit a lick. We wound up cutting the tree with and axe after I threw the saw in the pond!

    Every other one I’ve worked on have had one of the issues above. Fuel lines are usually the issue when someone at work brings me one and says it won’t start.
     
  6. Squareground3691

    Squareground3691 Pinnacle OPE Member

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    Yea some line issues to , switched over to a Cannon narrow kerf bar and rim sprocket with a Stihl PS chain works well and muffler mod . 8F761106-AA45-41A5-BB0C-B874B8445C92.jpeg
     
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  7. irhunter

    irhunter OPE Member

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    Age of the saw, and estimated run time will help get better responses. Do you still have a chain catcher? These saws have the catcher molded as part of the clutch cover...right?

    I agree with others about the fuel line. I do wonder if owners of these saws are not as careful about leaving gas in the saw, as they should be.

    Roy
     
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  8. Loony661

    Loony661 Stock chainsaws suck.

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    I have an 025 and also switched it over to 3/8 Picco on a 16” bar. With full chisel it’s surprisingly quick and for its size. They also have quite a bit of grunt for their size. We used a sell a lot of the MS250’s at the dealership. They are no professional saw by any means, but they are actually darn tough and handle a lot. Our fire dept has one in our “brush truck”. My biggest advice for them is: they flood easily. If it “pops” and you pull it even 1 more time on full choke, it’s flooded...

    I use mine mostly for trail clearing on the snowmobile and ATV trails. Also works well for hinge cutting trees for deer habitat. Sits most of the year for me, but glad I have it around for smaller tasks.
     
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  9. davidwyby

    davidwyby Desert beaver GoldMember

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    Crack in tank above fill explains leak. Sounded lean the other day…yeah 3800/15000 lean…gotta figure out how to bypass the limiter cap. no drums available locally, probably order the separate rim upgrade. Sharpened the chain on my USG, cuts good.

    erratic tension is what precipitated working on it which is why I running with cover off. Seems to work ok that way. Maybe for some reason with the cover on the chain wanders over to an unworn portion of the sprocket and gets tight…
    not a lot of what I assume was the chain Catcher left

    3F28779D-BA46-4400-A773-254A3D5BFD54.jpeg
     
  10. Loony661

    Loony661 Stock chainsaws suck.

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    I think the polymer cases on these are susceptible to warping slightly when the bar nuts are too tight. Have you tried setting the cover on and just backing off a bit with how tight you are setting them?

    Stihl makes a larger diameter stud for these because guys would over do it and pull the plastic right out with the studs... this model you can’t treat like a Pro saw when snugging the bar up.
     
  11. pbillyi69

    pbillyi69 Pinnacle OPE Member

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    i had a friend of mine give me an old 025 that he was having issues with and he left it outside for several years with gas in it. i dumped the fuel and cleaned all of the gunk off it put some fresh fuel in and it started on the fifth pull. it needs lines and a carb kit but it runs pretty well considering
     
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  12. qurotro

    qurotro Cookie Cutter

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    The ZaMA carb has a accelerate pump in it
     
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