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Husky 350 rebuild help

Discussion in 'Chainsaw' started by ucm, Apr 17, 2019.

  1. ucm

    ucm New Member

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    Hey everybody. As the title implies, I'm looking for some advice on my 350. Unfortunately it was straight gassed a few years ago by yours truly with very few tanks through it. I commited the ultimate sin of saying "I'll put the oil in the gas when I get back." Yeah, that didn't happen. I was so pissed, the saw got put in the corner and left untouched for a LLLOOOONNNGGG TIME.
    When I finally pulled it apart a couple weeks ago, I tried to clean up the jug and found enough damage to the 44mm jug to warrant replacing it. I researched all the options and decided on going with a base gasket deleted 353 rebuild vs going full 346xp.
    I jumped online and ordered a Hyway 353 kit with a pop up cylinder. This is my first time rebuilding a saw and I figured I'd clean up the intake and exhaust ports and clean up any casting flaws in the transfers. Just to dip my toes into the porting/polishing stuff without ruining anything.
    Things were going well until I realized a BIG difference between the jugs. On my old cylinder, the impulse port on the jug goes through the cylinder leg. On the new cylinder, the impulse port exits just outside of the cylinder leg. The port would end up sealed up where the cylinder riser and jug come together.
    I researched the heck out of the 350 to 353 conversion and don't remember reading anything about this type of situation. Any advice is appreciated. 20190417_020547.jpg
     
  2. cuinrearview

    cuinrearview Red saw lover

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    Just grind a channel in the bearing cup.
     
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  3. grizz55chev

    grizz55chev Tree Freak

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    I just drill a hole straight down in the cup.
     
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  4. ucm

    ucm New Member

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    Thank you gents. I figured the solution was simple, but wanted to ask the question before going buck wild with the grinder or the drill. The only dumb question is the one not asked!
     
  5. cus_deluxe

    cus_deluxe Thats what she said.

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    good eye on catching that, not everybody does haha.
     
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  6. Chainganger

    Chainganger ArboristSite Lurker

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    There is no such thing as a dumb question! I have asked plenty and usually find out the questions were actually pretty good ones!
    Oh, and it is also ok to freely admit when you do not know something!
     
  7. Mattyo

    Mattyo Youtube Speciawist

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    Lots of 350 stuff on my youtube channel. ...including bearing cup stuff. :)
     
  8. huskihl

    huskihl Addicted to ArboristSite

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    Looks like you went full 346 anyway....I would have too
     
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  9. Huskitoter

    Huskitoter ArboristSite Operative

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    huskihl noted it above. You may have purchased a 353, but the pic is a 346. Is it a 45mm bore?

    Some would be curious about the squish measurement of the current kit if you don't mind posting it.
     
  10. Mattyo

    Mattyo Youtube Speciawist

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    if it's hyway it's probably 45mm bore but closed quad port like 346xp. Oem 346xp is 44.3mm closed quad port.

    353 is pseudo closed port with removable transfer covers like later model 350. Earlier model 350s had the 44mm open port heads like the op originally straight gassed.
     
    Ronie likes this.
  11. cuinrearview

    cuinrearview Red saw lover

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    The Hyway "353" kit I have on a 2152 is 45mm quad port. I never measured squish because I used a gasket but for the little bit I played with it it is a runner! Four stroking north of 14k. That reminds me, i need to get a red fuel tank and get that thing wrapped up.
     
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  12. huskihl

    huskihl Addicted to ArboristSite

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    By the looks of the pictures he posted above, I'd run the hell out of that cylinder. It looks like it has the better plating in it like meteor. A little bit of port clean up and it probably runs really well
     
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  13. Huskitoter

    Huskitoter ArboristSite Operative

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    Interesting that the 353 kit is a 346 copy. I would have been really confused if he hadn't posted a pic because a real 353 doesn't need a groove in the cup.
     
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