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    Mariner EFI 4-stroke 50hp (2004) starts but dies after 3-4 seconds – hunting/surging issue

    Hi everyone, I have a 2004 Mariner EFI 4-stroke 50hp outboard that has developed a serious problem. What I know so far: Oil is clean, no water or milkiness at all Ignition coils and spark plugs are new/good Fuel is getting through the filter The engine has always started instantly and easily...
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