1. Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

Why you should replace butterfly (throttle shaft) seals.

Discussion in 'XJ Technical Chat' started by Jetfixer, May 12, 2019.

  1. XJ550H

    XJ550H Well-Known Member Premium Member

    Messages:
    10,166
    Likes Received:
    2,788
    Trophy Points:
    113
    Location:
    Great North Woods
    xj4ever sells those too
     
  2. firebane

    firebane Active Member

    Messages:
    126
    Likes Received:
    37
    Trophy Points:
    28
    Location:
    Calgary, AB
    So here is the thing... I know that Chacal (xj4ever) is a good source for a lot of this stuff, but unfortunately because of the exchange rate and shipping ordering from him can be QUITE costly for such small objects.

    With that said I see in this post people have talked about using #11 viton orings as throttle shaft seals, but has anyone measured out what a double lip or what size of seal would be necessary to replace the ones that are in there?

    Maybe something with some precise instruments who has their carbs ripped apart could give us depth, width and opening sizes and maybe find something that is easily accessible to all?
     
  3. Ryengoth

    Ryengoth Active Member Premium Member

    Messages:
    496
    Likes Received:
    136
    Trophy Points:
    43
    Location:
    Wilmington, NC
    I did measure mine with a caliper and mic but I didn't write them down. I ordered square seals that were supposed to fit and went with it. They were a little loose in the bore but squished and fill it when I installed the shaft clips and such. We'll see if they come back to haunt me. I have some 550 carb parts sitting in a tote that I can measure tonight and post dimensions.
     
  4. Simmy

    Simmy Well-Known Member

    Messages:
    1,006
    Likes Received:
    426
    Trophy Points:
    83
    Location:
    Waterloo Ontario Canada
    The cost of the correct seals seems insignificant to me compared to the labour (my time) to go back in there.
    Order new butterfly screws while you're at it.
     
    Franz likes this.
  5. Jetfixer

    Jetfixer Well-Known Member

    Messages:
    2,201
    Likes Received:
    912
    Trophy Points:
    113
    Location:
    Nothern Indiana
    Doubling up the #11 seals works fine ,in my spare set of carbs , my main set has the seals fro XJ4Ever ...I would rather use the seals from Chacal.
     
  6. Ryengoth

    Ryengoth Active Member Premium Member

    Messages:
    496
    Likes Received:
    136
    Trophy Points:
    43
    Location:
    Wilmington, NC
    11.5mm OD
    8mm ID
    3mm thick
     
    Alan63 and firebane like this.
  7. SecaMaverick

    SecaMaverick Member

    Messages:
    178
    Likes Received:
    21
    Trophy Points:
    18
    Location:
    Northeast Ohio
    I agree with the consensus to just replace them with the correct seals, if at all possible. I just rebuilt my carbs for probably the fourth time in 18 years (and this time it's been 10 years). Although I was expecting the throttle shaft seals to be brittle or slightly disintegrated -- I seem to remember using petroleum-based lubricant last time -- I was somewhat disappointed to find them in nearly new condition. But you better believe that while I was in there, I still replaced them and used the correct non-petroleum-based lube.
     
    chacal, k-moe and Jetfixer like this.

Share This Page