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Mariner 642S / Yamaha 3.5AC, starts but dies

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  • Mariner 642S / Yamaha 3.5AC, starts but dies

    Hi everybody
    I am fighting with this old Mariner, exact same as a Yamaha 3.5 AC
    It starts on first or second pull, on choke, but dies after 2-3 seconds.
    I cleaned the carburettor as best as I could, but no change.
    What do I need to check now?
    Thanks for your help.
    Jens

  • #2
    Let me say at the outset; I have never seen one of these motors, however from what you are describing, it definitely seems fuel related. Here is a parts manual if you are interested

    http://www.autocd.info/autocd/OM/3.5...4-28198-E5.PDF

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