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How do I mod my saw?

Post in 'The Gear' started by infinitymike, Nov 25, 2012.

  1. infinitymike

    infinitymike Minister of Fire

    Joined:
    Aug 23, 2011
    Messages:
    1,780
    Loc:
    Long Island, NY
    Hey guys.
    I haven't done any research but can you point me in the direction to modify my stihl MS311.
    I'd like to find a set by step link.
    I guess I should first ask, is it worth it? Will it perform better but die sooner?
    In the 80's I had a truck with a B&M blower and Holley 650 and kept spinning out the connecting rod bearings.
    I don't want to do the same thing here.

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  2. TreePointer

    TreePointer Minister of Fire

    Joined:
    Sep 22, 2010
    Messages:
    2,432
    Loc:
    Western PA
    Two main types of mods:

    1.) Muffler mod
    2.) Engine porting

    Muffler mods are much easier. They're also much less expensive to replace if you fubar one.

    Do a search at Arboristsite.
  3. MasterMech

    MasterMech Guest

    Simple things like muffler mods shouldn't negatively impact the overall life of the saw. Usually a muffler modification is cheap or free (except for labor ;) ) so it's up to you if it's "worth it". Lots of info over on AS about this kind of stuff but you may have to ask/look hard to find info for the MS311.
  4. RED FRONTIER

    RED FRONTIER Member

    Joined:
    Feb 26, 2010
    Messages:
    53
    Loc:
    Norwich CT
    I have a 1 year old ms311. 1 more year and I will be off warranty and looking at mods. Other wise great saw and flawless for the last year and at least 12 cord.
  5. Highbeam

    Highbeam Minister of Fire

    Joined:
    Dec 28, 2006
    Messages:
    10,020
    Loc:
    base of Mt. Rainier on the wet side, WA
    I ran into the same thing, a lack of detailed instructions. Mostly my problem was with removing the carb adjustement limiters. The old saws which are often the topic of threads are different than the new saws. Even a modern 290 vs. an old screw cap version.

    Be sure that you can adjust the carb before you begin cutting holes in your muffler.

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