Reply To: Has anyone done a Dual Battery switch setup – 1979 140 hp Mercury

Home › Forum › Ask A Member › Has anyone done a Dual Battery switch setup – 1979 140 hp Mercury › Reply To: Has anyone done a Dual Battery switch setup – 1979 140 hp Mercury

January 20, 2022 at 7:53 pm #253120
Bob Wight
Participant

    US Member

    I’ve never seen any outboard installation that needed 4/0 battery cable, even with a dual battery setup.   I have the same battery switch on my Evinrude 150 (although I only run 1 battery) and I have #2 battery cables.   Don’t know if this will help you but here’s a battery cable sizing chart published by Mercury.

    Battery-Cable-Wire-Gage-Table

    Bob

    1937 Champion D2C Deluxe Lite Twin
    1954 Johnson CD-11
    1955 Johnson QD-16
    1957 Evinrude Fastwin 18
    1957 Evinrude 3022
    1958 Johnson QD-19
    1958 Johnson FD-12
    1959 Johnson QD-20
    1982 Evinrude 25hp

    “Every 20 minute job is only a broken bolt away from a 3-day project.”
    "Every time you remove a broken or seized bolt an angel gets his wings."