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  1. #11
    Veteran Member
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    Kubota L3800DT, L3750DT Shuttle

    Default Re: Husky XP 550 Muffler mod completed.

    I cut the baffle out through the inlet opening, with a carbide burr. Then got the rest out through the outlet. Had to cut the deflector and bend back out of the way. Once done welded the deflector back.
    Don
    Kubota L3750 Hydro Shuttle, 4wd, FEL; L3800 Gear drive, 4wd, FEL
    Husqvarna XP chainsaws 346xp X3, 357xp, 562xp, 359

  2. #12
    Super Member Scooby074's Avatar
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    BX 25, ZD 326

    Default Re: Husky XP 550 Muffler mod completed.

    Quote Originally Posted by stormpetrel View Post
    Here's a thread about a 562XP mod w/muffler photos. One guy says improvement up to 20% with just the MM!!!
    http://www.arboristsite.com/chainsaw/203790-5.htm
    Wow!. Was that 20% with just the muff mod? You sure? If so, thats reallllly tempting.

    The 562 after all the cyl mods Stumpy did to it is sure a sexy beast! But if I can get 20 with just the muff, thats impressive too! I was also real impressed at the stock 562 with the 28" bar .


  3. #13
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    Default Re: Husky XP 550 Muffler mod completed.

    The 562xp is by far the most impressive stock saw I've ever run. I have owned and run a bunch of highly modded saws. It doesn't need a MM or porting at all, but gains are there if one wants.

    The word on the street is the 550xp doesn't need porting, it runs like a ported saw with just a MM.

    I live about an hour north of Stumpy and he is doing great work these days. He built my 75cc 365xpw and it is a beast!!!
    Don
    Kubota L3750 Hydro Shuttle, 4wd, FEL; L3800 Gear drive, 4wd, FEL
    Husqvarna XP chainsaws 346xp X3, 357xp, 562xp, 359

  4. #14
    Gold Member stormpetrel's Avatar
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    Block Island R.I.
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    Default Re: Husky XP 550 Muffler mod completed.

    Quote Originally Posted by Bluegill2 View Post
    The 562xp is by far the most impressive stock saw I've ever run. I have owned and run a bunch of highly modded saws. It doesn't need a MM or porting at all, but gains are there if one wants.

    The word on the street is the 550xp doesn't need porting, it runs like a ported saw with just a MM.

    I live about an hour north of Stumpy and he is doing great work these days. He built my 75cc 365xpw and it is a beast!!!
    I am torn between wanting another, larger chainsaw, and having my 550 ported. For around $200 I can buy (a) a used 285XP (b) a 70cc Jonsered or (c) have the 550 ported. Thoughts? (it already runs pretty incredible with the MM and having run 14 tanks of fuel though it...seems like the most bang for the buck would be porting?)

  5. #15
    Gold Member stormpetrel's Avatar
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    Default Re: Husky XP 550 Muffler mod completed.

    Quote Originally Posted by Bluegill2 View Post
    The 562xp is by far the most impressive stock saw I've ever run. I have owned and run a bunch of highly modded saws. It doesn't need a MM or porting at all, but gains are there if one wants.

    The word on the street is the 550xp doesn't need porting, it runs like a ported saw with just a MM.

    I live about an hour north of Stumpy and he is doing great work these days. He built my 75cc 365xpw and it is a beast!!!
    I am torn between wanting another, larger chainsaw, and having my 550 ported. For around $200 I can buy (a) a used 285XP (b) a 70cc Jonsered or (c) have the 550 ported. Thoughts? (it already runs pretty incredible with the MM and having run 14 tanks of fuel though it...seems like the most bang for the buck would be porting?)

  6. #16
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    Default Re: Husky XP 550 Muffler mod completed.

    Quote Originally Posted by stormpetrel View Post
    I am torn between wanting another, larger chainsaw, and having my 550 ported. For around $200 I can buy (a) a used 285XP (b) a 70cc Jonsered or (c) have the 550 ported. Thoughts? (it already runs pretty incredible with the MM and having run 14 tanks of fuel though it...seems like the most bang for the buck would be porting?)
    Tough call. I like smaller high performance saws much better than heavy bulky 70cc+ saws. But that's just me...
    Don
    Kubota L3750 Hydro Shuttle, 4wd, FEL; L3800 Gear drive, 4wd, FEL
    Husqvarna XP chainsaws 346xp X3, 357xp, 562xp, 359

  7. #17
    Veteran Member
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    Default Re: Husky XP 550 Muffler mod completed.

    Second thought, I'd just send the 550 to Stumpy and be done with it.
    Don
    Kubota L3750 Hydro Shuttle, 4wd, FEL; L3800 Gear drive, 4wd, FEL
    Husqvarna XP chainsaws 346xp X3, 357xp, 562xp, 359

  8. #18
    Elite Member
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    Foster, RI
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    Mahindra 3016

    Default Re: Husky XP 550 Muffler mod completed.

    Quote Originally Posted by stormpetrel View Post
    I am torn between wanting another, larger chainsaw, and having my 550 ported. For around $200 I can buy (a) a used 285XP (b) a 70cc Jonsered or (c) have the 550 ported. Thoughts? (it already runs pretty incredible with the MM and having run 14 tanks of fuel though it...seems like the most bang for the buck would be porting?)
    First, I'd leave my 550 alone. The MM is enough in my mind. Depends on what you're cutting. If its always firewood type, just stick with the 550. If you are in the woods harvesting your own trees, I love a big saw to stump with. I had a 385 just for that purpose but got rid of it just after a year as it didn't have that much more grunt than the 372 for the weight difference. I'd always opt for the larger saw if you need a torquey larger cc saw for such things as bucking and you do not want to switch bars. A 16" bar on a 70 cc saw is a wonderful thing for such work.. Don't forget its more than just speed and power of a chainsaw its also technique of cutting and operating a saw just right in its powerband. That comes with experience where you can out cut many a larger saw wielded by less than knowledgeable.

  9. #19
    New Member
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    May 2013
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    Pinnacle, North-Carolina
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    IH 1026

    Default Re: Husky XP 550 Muffler mod completed.

    Hello guys,

    I am coming in on this thread way late. I just bought a 550 and have run two tanks of fuel through it and I'm ready to mod this muffler.
    I modified my 345 years ago by welding a stub of 3/4" EMT conduit.
    I like being able to use a carbide to enlarge the opening.
    How much larger is the exhaust opening? The screen makes it hard to tell.

    Thanks,

    Tom

  10. #20
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    Default Re: Husky XP 550 Muffler mod completed.

    Tom, just do like the OP did. Open up another hole next to the stock hole under the deflector. Make it as big as there is room for. No need to get all crazy with it.
    Don
    Kubota L3750 Hydro Shuttle, 4wd, FEL; L3800 Gear drive, 4wd, FEL
    Husqvarna XP chainsaws 346xp X3, 357xp, 562xp, 359

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