In loving memory of Kenis D. Keathley 6/4/81 - 3/27/22 Loving father, husband, brother, friend and firewood hoarder Rest in peace, Dexterday

MS 170 perk up/mod

Discussion in 'Chainsaws and Power Equipment' started by WeldrDave, Mar 11, 2015.

  1. WeldrDave

    WeldrDave Military Outpost Moderator

    Joined:
    Oct 8, 2013
    Messages:
    9,278
    Likes Received:
    48,415
    Location:
    The Communist Socialist Republic of New Jersey
    As some of you know, I just prunned my trees this past week and I used my 170. I don't have a complaint at all and it's a great little saw, but would a muffler mod be worth doing on it to get a little more uumph...?

    I realize you not gonna get a massive change in it for a trimmer saw but has anyone approched this?
     
  2. Chvymn99

    Chvymn99 Moderator

    Joined:
    Oct 4, 2013
    Messages:
    19,269
    Likes Received:
    98,726
    Location:
    KC Metro
    The only thing that I could think of negative on this is does it have a adjustable carb? That was the one issue with my 180... But Honeyfuzz but a adjustable on it.

    Also make sure to keep the screen on the spark arrestor clean.
     
    WeldrDave likes this.
  3. 94BULLITT

    94BULLITT

    Joined:
    Sep 20, 2014
    Messages:
    2,446
    Likes Received:
    7,183
    Location:
    Frederick County, VA
    Put a Walbro WT-215 carb on it then mod the muffler. It will really wake it up.

     
  4. clemsonfor

    clemsonfor

    Joined:
    Oct 3, 2013
    Messages:
    15,968
    Likes Received:
    37,265
    Location:
    Greenwood county SC
    Need an adjustable carb.

    That and advancing the timeing you will have a screamer.
     
    Last edited: Mar 11, 2015
    WeldrDave likes this.
  5. 94BULLITT

    94BULLITT

    Joined:
    Sep 20, 2014
    Messages:
    2,446
    Likes Received:
    7,183
    Location:
    Frederick County, VA
    Here is my 170 after a ignition timing advance.

     
  6. clemsonfor

    clemsonfor

    Joined:
    Oct 3, 2013
    Messages:
    15,968
    Likes Received:
    37,265
    Location:
    Greenwood county SC
    What negative if any effects does advancing the timeing have on a stock saw or even muffler modded saw?

    If the benefit is this good why dont the manufactures just time it like that to start?
     
    WeldrDave likes this.
  7. 94BULLITT

    94BULLITT

    Joined:
    Sep 20, 2014
    Messages:
    2,446
    Likes Received:
    7,183
    Location:
    Frederick County, VA
    With the timing advanced the saw will kick sometimes when you start it. The saw cranks a little harder now too.
     
    MasterMech and WeldrDave like this.
  8. clemsonfor

    clemsonfor

    Joined:
    Oct 3, 2013
    Messages:
    15,968
    Likes Received:
    37,265
    Location:
    Greenwood county SC
    I can see hard starting to be a huge negative for a manufacturer. They want things that start easy.
     
    WeldrDave likes this.
  9. 94BULLITT

    94BULLITT

    Joined:
    Sep 20, 2014
    Messages:
    2,446
    Likes Received:
    7,183
    Location:
    Frederick County, VA
    They probably also having the timing set conservative so if someone runs old gas they won't burn a piston.
     
    WeldrDave and prell 73 like this.
  10. WeldrDave

    WeldrDave Military Outpost Moderator

    Joined:
    Oct 8, 2013
    Messages:
    9,278
    Likes Received:
    48,415
    Location:
    The Communist Socialist Republic of New Jersey
    Good stuff Guy's!!! I'm not a super mechanic, but I can get it done. pound for pound, that is a "super" little saw! When I was up in the bucket holding it with one hand, I was saying to myself… Boy I wish It would cut faster :whistle: Thanks for the input, it gives me some ideas!
     
    94BULLITT likes this.
  11. WMW0505

    WMW0505

    Joined:
    Mar 1, 2015
    Messages:
    89
    Likes Received:
    218
    Location:
    Lexington, KY
    Chain goes a long way on these little guys too. What are you running?

    Hint: anything other than yellow chisel chain is the wrong answer.
     
    WeldrDave and clemsonfor like this.
  12. WeldrDave

    WeldrDave Military Outpost Moderator

    Joined:
    Oct 8, 2013
    Messages:
    9,278
    Likes Received:
    48,415
    Location:
    The Communist Socialist Republic of New Jersey
    It's the factory green safety chain...:emb:
     
    WMW0505 likes this.
  13. WMW0505

    WMW0505

    Joined:
    Mar 1, 2015
    Messages:
    89
    Likes Received:
    218
    Location:
    Lexington, KY
    Grab a loop of yellow chisel chain the next time you find yourself at the dealership.

    I use semi chisel on my other saws due to dirty wood and the occasional unintended ground strike. I normally only use my 180c for limb work so I have no worries about dirt.
     
    WeldrDave and clemsonfor like this.
  14. 94BULLITT

    94BULLITT

    Joined:
    Sep 20, 2014
    Messages:
    2,446
    Likes Received:
    7,183
    Location:
    Frederick County, VA
    I don't think you can get yellow chisel chain from stihl in .043."
     
    rookie1 likes this.
  15. WMW0505

    WMW0505

    Joined:
    Mar 1, 2015
    Messages:
    89
    Likes Received:
    218
    Location:
    Lexington, KY
    You may be correct. I run 0.050.
     
    94BULLITT and clemsonfor like this.
  16. FarmHand78

    FarmHand78

    Joined:
    Jan 10, 2015
    Messages:
    720
    Likes Received:
    2,895
    Location:
    South East Iowa
    I've got a 017/MS170 Frankensaw, It's a 017 chassis with a MS170 jug, has an aftermarket fully adjustable carb and muffler modded. I'm running 3/8 picco in .043 Stihl 61PMM3 chain on a 14" bar. The little thing just rips through wood. I wouldn't get to carried away with the chain, I think it could get to aggressive for the little saw that it is. I love the exhaust not the mad little bumblebee has, like a wanna be big saw.
     
    rookie1 likes this.
  17. FarmHand78

    FarmHand78

    Joined:
    Jan 10, 2015
    Messages:
    720
    Likes Received:
    2,895
    Location:
    South East Iowa
    Here is the little guy. 20141021_091617.jpg
     
    Drvn4wood, 94BULLITT and prell 73 like this.
  18. Eric VW

    Eric VW Moderator

    Joined:
    Jan 6, 2015
    Messages:
    23,598
    Likes Received:
    133,372
    Location:
    US
    Great little saw there, 94BULLITT,
    I must read more about ignition timing. Besides a search of the forum, can anyone tell me the ins and outs of performing an adjustment to the ign. timing?
    Thanks,
    Eric VW
     
  19. clemsonfor

    clemsonfor

    Joined:
    Oct 3, 2013
    Messages:
    15,968
    Likes Received:
    37,265
    Location:
    Greenwood county SC
    I am thinking you have to cut the key off and then just turn the flywheel a bit and tighten it back down with lock tight.

    Least thats what I have read here and on AS. But I am sure the other guys can tell you better.
     
    Last edited: Mar 12, 2015
  20. Eric VW

    Eric VW Moderator

    Joined:
    Jan 6, 2015
    Messages:
    23,598
    Likes Received:
    133,372
    Location:
    US
    That sounds like NOT fun if ya screw it up!
    Who else can share their experience/how to- in advancing ignition timing.
    Eric VW