Reply To: 1957 Evinrude big twin

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August 19, 2024 at 11:10 pm #289974
Buccaneer
Participant

    US Member

    Dale, does that motor have a vacuum “cut out” switch to kill one
    cylinder if the engine “runs away”? The Mercury switch may
    be part of the ground circuit for the vacuum switch, and for
    disabling starting when the throttle is set too fast.
    Seems like some motors had two mercury switches??

    Prepare to be boarded!