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Broke off the float idler pin arm of 40DCNF carburetor

Discussion in 'Technical Q&A' started by christopher, May 3, 2009.

  1. christopher

    christopher Formula 3

    Nov 29, 2003
    1,131
    Ontario California
    Full Name:
    Christopher
    #1 christopher, May 3, 2009
    Last edited by a moderator: Sep 7, 2017
    Hey Guys,

    Has this ever happened to you?

    While rebuilding the carburetors, I dislodged the float pin and the little pinch arm broke off……Bummer last carburetor to be rebuilt too.

    My question is, what can I do to fix it? Since the arms will be exposed to gasoline, how should I get this repaired? Welding, cement…. Any ideas.

    Thank you very much…

    Chris.
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  3. brian.s

    brian.s F1 Rookie
    Professional Ferrari Technician

    Nov 3, 2003
    3,761
    Midwest
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    Brian
    I should have a new top here, PM me, I will check on stock and price.
     
  4. LarryS

    LarryS Formula Junior

    Nov 14, 2003
    302
    Fremont, CA
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    Larry S
    I have repaired that problem many times on motorcycle carbs
    by drilling 2 small holes and using a lap of safty wire to hold float
    pin in place. Has always worked fine.
     
  5. christopher

    christopher Formula 3

    Nov 29, 2003
    1,131
    Ontario California
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    Christopher
    Thanks for your advise, I may have to resort to that.

    Thank you,

    Chris.
     
  6. christopher

    christopher Formula 3

    Nov 29, 2003
    1,131
    Ontario California
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    Christopher
    Did you get a chance to review the PM thatI had sent you?

    It looks as if the later weber carbs has somewhat of a very light green-ish finish to them, I'd like to try to mirror that if possible.

    Please let me know what you might have available.

    Thank you,

    Chris.
     
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  8. MiuraP400

    MiuraP400 Formula Junior

    Feb 3, 2008
    806
    Arizona
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    Jim
    If you decide to try an epoxy to repair it I have used JB Weld in Holley fuel bowl. Fuel does not effect it at all.

    Cheers Jim
     
  9. brian.s

    brian.s F1 Rookie
    Professional Ferrari Technician

    Nov 3, 2003
    3,761
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    Brian
    Have one top, unfortunately not for 308 style. Check with Pierce Manifolds in CA.
     
  10. Artvonne

    Artvonne F1 Veteran

    Oct 29, 2004
    5,379
    NWA
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    Paul
    I bet Mark (mk e), could weld it up like new?
     
  11. davehelms

    davehelms F1 Rookie

    Jan 3, 2004
    4,629
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    Dave Helms
    I have done what Larry suggested many times and it provides a lasting repair. Use the thinnest stainless safety wire and you will be fine. Epoxy will not hold up to the constant fuel fumes.
     
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  13. christopher

    christopher Formula 3

    Nov 29, 2003
    1,131
    Ontario California
    Full Name:
    Christopher
    I actually found a nice carb top at G.T. Car Parts...Bill "hooked me up" with one for about $100.00. I couldn't argue, he's ALWAYS come in for me.

    Just one question from you experienced guys, the brass tubing the screws into the housing, do you need to use a bonding agent (plummers tape), or can you just screw it in as is???

    Thanks, Guys,

    Chris.
     

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