How to Hook Up Ignition Switches in Boats

Electric ignition switches are an easy and convenient way to start your boat, as opposed to the pull-start outboards of older times. However, if your boat key seems loose, doesn't fire up right away, or has to be jiggled to start the boat, it may be time to replace the ignition switch. Replacement ignition switches can be purchased at most marine shops and are relatively inexpensive. A replacement ignition switch can be installed in one to two hours.

Things You'll Need

  • Wrench
  • Flat head screwdriver
  • Pen and paper
  • Soldering iron
  • New ignition switch
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Instructions

    • 1

      Remove the negative battery cable on your boat battery with the wrench.

    • 2

      Use the flat-head screwdriver to pry your old ignition switch out through the bezel on the dash panel.

    • 3

      Examine wire connections on the back of the old switch and draw a wiring chart on a piece of paper, detailing which colored wires are connected to what posts.

    • 4

      Plug the soldering iron in and heat up each terminal enough to remove the old connections and ignition switch. Use a damp sponge to wipe off any old solder flux.

    • 5

      Set the old switch aside and take the new switch in hand. Using the wiring diagram as a reference guide, solder the wires to their respective terminals on the back of the ignition switch.

    • 6

      Place the ignition switch back into the dash bezel and replace the negative battery cable. Try the key to test the new ignition switch.