1986 Techumseh OH 160 Wiring Question

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Thread: 1986 Techumseh OH 160 Wiring Question

  1. #1

    Question 1986 Techumseh OH 160 Wiring Question

    Hello all

    My first post is a question. Go figure eh?

    I have an Argo 6x6; I believe 1986. The old owner installed an electric fuel pump controlled by a switch. I wouldn't say I like it... I want to figure out where the fuel pump will only turn on when the engine is running.

    So far, I figure connecting a relay where the charging coil goes to the battery's positive pole. I thought the amperage made by the charging coil would trigger the relay.

    I feel slightly lost, but I know there is some way.
    Last edited by Dworth; 10-11-2022 at 12:55 PM.

  2. #2
    Join Date
    Nov 2020
    Location
    Southwestern Ont Can about 5 miles from Lake Huron just north of the town of Goderich.
    Posts
    201
    You could wire it into the ignition so when the key is in the run position the pump works. Eliminates the pump switch.

  3. #3
    Only issue I've ran into with that is the key in the off positions makes a connection in order to kill the engine, instead of breaking a connection.

  4. #4
    Quote Originally Posted by Laird View Post
    You could wire it into the ignition so when the key is in the run position the pump works. Eliminates the pump switch.
    Wiring.jpg

    So far the issue I have is that the positive line going from the charging coil to the battery constantly has 12v but no amps, when running the charging coil creates a roughly reliable 6 amp charge on the battery. I was hoping a normal relay would work because of the minimum amperage needed to activate. But since there is no ground it doesn't trigger and I know grounding the coil will damage it.

    So my thought is so figure out maybe an amperage-activated relay.

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