Fuel leak help

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  • February 19, 2017 at 9:53 pm #24448
    bish
    Participant

    I’m trying to resolve a fuel leak on my Cultmate it’s coming from where the fuel pipe from the tank bolts onto the bottom of the carb. I’ve tried pinching it tight but it still floods out has anyone got any ideas on how to fix it?

    February 20, 2017 at 9:37 am #24452
    charlie
    Keymaster

    What carb is it? Does the banjo on the pipe have a fibre washer on both sides where it bolts to the carb? Have you tried new washers?

    February 20, 2017 at 10:16 am #24454
    bish
    Participant

    It’s an Amal 124 I’ve changed the fibre washers between the bolts holding the bowl onto the carb body but it’s leaking from where the pipe bolts underneath the float bowl.

    February 20, 2017 at 10:19 am #24455
    bish
    Participant

    This is a picture of a spare carb I bought it’s where the pipe bolts underneath is where it’s leaking from.

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    February 20, 2017 at 10:46 am #24457
    ted20
    Participant

    two possibilities one thread on union or carb stripped two fibre washer between pipe and float chamber Dave

    February 20, 2017 at 10:52 am #24458
    ted20
    Participant

    another thought is petrol running down pipe or above connection if flowing between pipe and union cut off end of pipe and use brake pipe flaring tool to put new collar on pipe Dave

    February 20, 2017 at 4:07 pm #24460
    charlie
    Keymaster

    It sounds as if the olive on the end of the pipe is worn or damaged, or the fitting in bottom of float bowl is damaged. Nut on pipe should pull olive on end of pipe up tight into the fitting on float bowl.

    February 20, 2017 at 4:08 pm #24461
    charlie
    Keymaster

    Another possibilty is joint between pipe and olive is cracked.

    February 24, 2017 at 9:03 pm #24512
    bish
    Participant

    Right solved the one problem and caused another. There was a split in the pipe so swapped that for a new pipe which fixed that leak however I now have fuel flooding out of the top of the carburettor float chamber. It’s pouring out of the tickler hole and there’s two small holes on the side of the chamber cap which look like they are supposed to be there but fuel is squirting out these holes at quite a pace? Could the position of the float have anything to do with this problem?

    February 24, 2017 at 9:14 pm #24513
    charlie
    Keymaster

    It could be float height or valve not closing on seat properly.

    February 24, 2017 at 9:52 pm #24514
    bish
    Participant

    Thanks for your reply Charlie would you know what sort of height the float should be?

    February 26, 2017 at 10:15 am #24515
    charlie
    Keymaster

    I don’t have any information on the Amal 124 carb unfortunately. Valve on float should close before float chamber floods.

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