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Thread: Carby leak tip

  1. #1
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    Carby leak tip

    Folks, I noticed- now that I have a sense of smell again (!), that there was a smell of fuel when I opened Matilda's bonnet. I found that the accelerator pump had a slight leak around the base of the front housing.

    I tightened the screws across the top and side of the housing, re-primed the carby, but within a few minutes, the underside was fuel wet again.

    Anyway, I removed the air-filter to get better access, and unscrewed the housing bolts almost completely until fuel steadily leaked from the accelerator unit. Then, I retightened the bolts, a turn at a time, moving to opposite bolts, tighten, and so on - until firm - not stupid tight.....anyway, all fixed. I can now prime the carby so it's full of fuel with no leak whatsoever. Still dry, 4 hours later....yeah, go me!

    Just thought the experience was worth sharing, as nothing was really wrong with the seals, it was just that the easy to access bolts were overtightened in relation to the harder to get to ones.....

  2. #2
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    Also, looking at the parts manual, I was missing a washer on the accelerator rod that connects to the throttle spindle. Without it, the spring pushes the rod too far open which causes leaks.....also now fixed. Will post pic to explain.....

  3. #3
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    Carby leak tip

    So here is the accelerator rod which connects to the throttle spindle....complete with spacing washers, and a butchered paperclip as a split pin....without the washers, the spring won't load the rod enough and fuel seeps from the accelerator unit, and to a lesser degree, the throttle spindle.....


  4. #4
    Join Date
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    You're the man Dan, you can fix anything now. I love the paperclip pins, I should have an assortment of split pins at home, so we can make the job look a little more professional. Although I do applaud your resourcefulness. Very SLOW.

    Cheers, Mick.
    1968 SIIa SWB
    1978 SIII Game SWB
    2002 130 Crew Cab HCPU

  5. #5
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    Quote Originally Posted by Killer View Post
    ...... I've an assortment of split pins at home, so we can make the job look a little more professional.
    Cheers, Mick.
    Great - that would be much appreciated!

  6. #6
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    Well, I've saved you the bother Mick......went down to Rip Every Poor Chap Off and found - from their bizarre bin - their last box of NOS BSF accelerator rod split pins and did the job myself.

    Only took me an entire day to manage to get a split pin - and the world's smallest washer, in place on the rear face of the accelerator rod as it disappears behind the throttle spindle control arm......

    But a combination of ignorance, perseverance, swearing, sunburn, determination, bonnet removal and sheer bloody mindedness lead eventually to success....

    Did the test drive - Oh, yeah.....

    I shall post a pic when the sun once more positions itself above our sector of the empire, with the warning that is just so darn genius it might actually blow up the internet entirely.

    Stay tuned.

  7. #7
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    You're really getting to know your vehicle now Dan.
    I finally pulled the gearbox out of the Tinman yesterday, it is as we first diagnosed, broken clutch plate.

    Cheers, Mick.
    1968 SIIa SWB
    1978 SIII Game SWB
    2002 130 Crew Cab HCPU

  8. #8
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    Carby leak tip

    Great! Hopefully all good for Coolatai.

    .....now, brace yourself, world....


  9. #9
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    That is art, Dan. Pure Art!

    Cheers, Mick.
    1968 SIIa SWB
    1978 SIII Game SWB
    2002 130 Crew Cab HCPU

  10. #10
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    I agree with Mick. That looks like it was factory fitted but better.

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