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My Husqvarna 372 Muffler Mod

Discussion in 'Chainsaw' started by JohnnyBoy1986, Feb 6, 2010.

  1. JohnnyBoy1986

    JohnnyBoy1986 ArboristSite Operative

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    This is the recent muffler mod i had done to one of my 372XP's. The saw hasnt been properly tuned yet in this video so the revs are lagging but the points the same. Anyways, here it is! :D
    Video -- http://www.youtube.com/watch?v=cUmRcaLiLGs

    [​IMG]
     
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  2. jeepyfz450

    jeepyfz450 Addicted to ArboristSite

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    looks good get it tuned in and it should cut like a mofo
     
  3. JohnnyBoy1986

    JohnnyBoy1986 ArboristSite Operative

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    thanks, the welder didnt want to cooperate much but in the end its ok, its my muffler anyway. i've recently tuned it and it did very well in the wood. i like it :) soon i will be ready to woods port the saw, then i will even throw some paint on the muffler :biggrinbounce2:
     
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  4. nanuk

    nanuk AboristSite Guru

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    another success story!

    good stuff!
     
  5. TFPace

    TFPace ArboristSite Operative

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    tuning

    What is required of a re-tune after that mod has been done?
     
  6. Jacob J.

    Jacob J. Tree Freak

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    The engine will be moving more air, so you need to give it more fuel. You'd need to richen both your high and low adjustments (counterclockwise) a bit, maybe 1/8 to 1/4 a turn or a bit more, depending on how much the muffler is opened up.
     
  7. rbtree

    rbtree Addicted to ArboristSite

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    Sorry to say this, after the fact, but you will hate those front firing ports......Best place is on the side by the chain......All you need is a deflector from a 288, some screen material, and a dremel.....

    They can break off, or deflect the gases so as to get in your face....and catch the tree on fire....in the case of my 3120, which is putting out somewhere in the neighborhood of 12.87392106 hp

    Also, I hope you closed up the factory port (which is in the proper place, by the way), as those two ports are, even by themselves, too large.
     
    Last edited: Feb 7, 2010
  8. woodyman

    woodyman Addicted to ArboristSite

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    Are those 1/2" pipes you used and did you seal off the stock exhaust port on the top?Don't know about the location of your pipes but if they work for you good deal.Two 1/2" pipes on that saw with the stock port sealed should work fine.
     
  9. Gypo Logger

    Gypo Logger Tree Freak

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    This is the way I prefer to braze the pipes.
    Gypo

    [​IMG]
     

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