ArboristSite.com Sponsors
 
 


Late night carb help needed - Walbro SDC rebuild???

Discussion in 'Chainsaw' started by Steve NW WI, Nov 18, 2010.

  1. Steve NW WI

    Steve NW WI Unwanted Riff Raff.

    Joined:
    Jan 10, 2009
    Messages:
    8,199
    Likes Received:
    3,481
    Location:
    Wisconsin
    Hi all,

    Hoping there are some other latenight saw nuts looking for a problem to solve. I'm rebuilding the Walbro SDC-53 carb off my Pioneer P60. I've got it all torn down and cleaned, with the exception of the Welsch plugs and trinkets under them.

    I started to reassemble, had to dig through some links to find the order of assembly on the fuel pump side, but have that covered now - thanks for the link to the Walbro service manuals in an old thread by Gary. The question I have is I have two gaskets for that side, one .060" thick, the other .030" thick. Which one is correct and why?

    Thanks in advance, time to catch up on my reading and hope for an answer before I get tired and go to bed :D
     
  2. Roanoker494

    Roanoker494 Addicted to ArboristSite

    Joined:
    Sep 9, 2010
    Messages:
    5,188
    Likes Received:
    483
    Location:
    Narrows, Va 24124
    Did the old gasket happen to make it through being removed? How thick is the old one? In case you already have, don't ever throw your old parts out until the carb is completely back together. Just in case of a situation like this.
     
  3. Steve NW WI

    Steve NW WI Unwanted Riff Raff.

    Joined:
    Jan 10, 2009
    Messages:
    8,199
    Likes Received:
    3,481
    Location:
    Wisconsin
    The old pieces were a bit different - possibly original '78 vintage. New consists of rubber diaphragm, fiber piece, and gasket (s), the old one seems to be a combo 1 piece unit, or it became one over the years. If I had to guess off this I'd use the thinner one though.

    BTW, I can get pics if needed. Anything like this, I take pics while tearing down, because it might not go back together the same day (week, month) and the old brain just can't be trusted sometimes...
     
  4. wigglesworth

    wigglesworth Booned

    Joined:
    Oct 5, 2008
    Messages:
    7,764
    Likes Received:
    2,321
    Location:
    West kentucky
  5. Steve NW WI

    Steve NW WI Unwanted Riff Raff.

    Joined:
    Jan 10, 2009
    Messages:
    8,199
    Likes Received:
    3,481
    Location:
    Wisconsin
    Specifically #22, plain old gasket. Got 24 and 25 figured out, just have 2 different thickness gaskets in the kit I got.

    If it don't run today, it ain't gonna run till December, deer season opens tomorrow here!
     
  6. Steve NW WI

    Steve NW WI Unwanted Riff Raff.

    Joined:
    Jan 10, 2009
    Messages:
    8,199
    Likes Received:
    3,481
    Location:
    Wisconsin
    Anyone?
     
  7. WetGunPowder

    WetGunPowder Addicted to ArboristSite

    Joined:
    Apr 6, 2009
    Messages:
    1,301
    Likes Received:
    556
    Location:
    Dresser,WI
    BAG-N-DRAG it!!!:laugh:
     
  8. RTK

    RTK ArboristSite Operative

    Joined:
    Nov 28, 2009
    Messages:
    341
    Likes Received:
    21
    Location:
    Kalifornia
    You mentioned something about a fiber like gasket??. If that is the one I am thinking of with flappers it goes on the pump side and is more resistant to fuel additives than the rubber one it replaces. Doesn't pump as quick or well as the rubber ones.
    On the other side (atmospheric vent side) I would use the thinner one first and see how it runs. Gasket=> diaphragm=>plate,,,reverse on the pump side.
     
  9. Bob Wright

    Bob Wright Addicted to ArboristSite

    Joined:
    Apr 27, 2004
    Messages:
    2,062
    Likes Received:
    225
    Location:
    Salem, Oh
    I had the same SDC kit for my Echo 1001 and it had the 2 cover gaskets. I picked the thicker one...Bob
     
  10. leeha

    leeha Addicted to ArboristSite

    Joined:
    Jan 17, 2008
    Messages:
    6,275
    Likes Received:
    813
    Location:
    mass.
    I just did 2 SDC carbs this week for the
    Homelite Super 1130G and the originals
    were the thick gasket, So thats what i used.



    Lee
     
    Bob Wright and Hugenpoet like this.
  11. Steve NW WI

    Steve NW WI Unwanted Riff Raff.

    Joined:
    Jan 10, 2009
    Messages:
    8,199
    Likes Received:
    3,481
    Location:
    Wisconsin
    WGP, I can't bag and drag, ya ain't got nothing up there thats 100ccs to replace it!

    Thanks the rest of ya, if I get all my hunting stuff laid out before I'm ready for the sack, I'll get it put together tonight.
     
    Hugenpoet likes this.

Share This Page