Reply To: 1960 Merc 400E bogs down under throttle

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March 28, 2022 at 5:09 pm #257051
billw
Participant

    US Member

    One simple thing to try is open both low speed needles a 1/4 turn and try running it again. It might make it idle WORSE by a little bit but just try it. I don’t know what is up with inline Mercurys but that is a common problem….acts sort of like the accelerator pump on a car engine is bad. I am not making any promises that it’s that simple in your case but I have seen it MANY times in the past.

    Long live American manufacturing!