Author Topic: MS 170  (Read 148 times)

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Offline ChipsAhoy

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MS 170
« on: October 03, 2017, 10:20:57 pm »
Hi, I've got one of these -new in 05- that was running good until lately. It now wants to bog some when going from idle to full throttle. It seems like it needs a carb adjustment but I don't believe there is one other then idle. I've always used E-free gas & sea-foam along with Stihl or Husky oil. It don't have a whole lot of run time considering it's from 05, so I'm not sure what kind of tweak it takes to clear it's throat.
Any suggestions?

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Offline Cut4fun .

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Re: MS 170
« Reply #1 on: October 04, 2017, 12:43:52 pm »
Open the L side up some  counterclockwise. Check make sure you dont have the epa stops on it. If so pull.    It is prob missing the H side but should have I and  L. L has to do with that trigger response.

Carb diaphragm might be  getting stiff but try opening the L first.   

New oem carbs with L and H like $25 new so weigh decision f it ends up needing carb lit.
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Offline deezlfan

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Re: MS 170
« Reply #2 on: October 04, 2017, 06:06:43 pm »
Saw is 12 years old and I don't care if you have always used non-E gas, it is time to change the fuel line and filter.   My MS210 needs a fuel line just about every season even using Stihl parts. 
We just drag them down..... Until they're just like us !!!  BNL
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Offline ChipsAhoy

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Re: MS 170
« Reply #3 on: October 04, 2017, 06:40:25 pm »
Thanks for the info. I used it awhile today and it seems to be running rich.....oily muffler. Also used my 211 - same fuel- and it burned clean. I'll try what you guys suggested and put a new plug in also.

Offline 660magnum

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Re: MS 170
« Reply #4 on: October 04, 2017, 06:51:07 pm »
Oem Carb was likely single needle. They run good and well - balanced when as new.
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