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  1. #1
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    1975 Evinrude 70 Starting Issue

    Hey guys, hopefully somebody can help me here. I'm by no means a mechanic, but I can follow instructions and tinker.

    Last time when I went to start my motor nothing happened, figured battery cables, so checked them. Got back in seat, turned key and it broke off. Key was stuck in there so had to order new ignition switch. Mine is old style with separate toggle choke switch.

    Even though the new control is the right part number, it has more posts. My old switch just had S, M,M, A. This one also has I and B.

    Every manual I'm finding says I should have another wire, but I don't.

    I have it wired like the old one and it's not working, got everything correct I think, and power to switch. But no dice. I don't understand why I have different wiring. Also starter fuse was blown. Assuming that's my original problem and it could be from solenoid being bad?

    Sorry for the essay this is where I'm at. Please help if you have ideas.

  2. #2
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    There should only be one extra post on the ignition switch which would be labeled "C" for choke. Try jumping the starter solenoid. If it cranks, work your way back from there... There is also a safety neutral switch inside the control box to check..
    Last edited by flabum1017; 05-13-2017 at 09:30 AM.
    "One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors". Plato .

  3. #3
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    Here is the closest wiring diagram I could find online: http://forums.iboats.com/filedata/fetch?id=7103603
    "One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors". Plato .

  4. #4
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    Been burned by aftermarket switches from marine part store off the shelf items. Hook em up one wire at a time, clockwise, and still not correct. Letters may or may not be the same on back of switch. Had to use 12 volt tester to see which posts light up when key is turned on, start circuit engaged, and choke is applied, after known 12 volt power source is located. Just my experience with what I had available at local marine store parts.

  5. #5
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    Ok, so my wife managed to dig out key. So now, I have it back hooked up. Won't turn over, fuse was blown. New fuse, now when I go to start it clicks. But if I bridge starter I can turn over. So does this mean solenoid?

  6. #6
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    Good wife! Probably solenoid. Be sure to make certain of all clean connections everywhere! Battery, solenoid, starter, etc. Be sure to have fully charged battery at least 12.5 volts after sitting a while after charging, before condemning solenoid.

  7. #7
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    check the earth strap on the motor, take off starter and clean behind it.
    but I would sooner say its your old cables giving the problem.

    what if you earth the powerhead and then put from battery positive to solenoid and then run a jumper wire to put power to solenoid ???? this will tell you if its that.
    if it turns over then its a crap wire between solenoid and control box.

  8. #8
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    Quote Originally Posted by phillnjack View Post
    check the earth strap on the motor, take off starter and clean behind it.
    but I would sooner say its your old cables giving the problem.

    what if you earth the powerhead and then put from battery positive to solenoid and then run a jumper wire to put power to solenoid ???? this will tell you if its that.
    if it turns over then its a crap wire between solenoid and control box.
    I will try this tonight or tomorrow.

  9. #9
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    Quote Originally Posted by Flex View Post
    Ok, so my wife managed to dig out key. So now, I have it back hooked up. Won't turn over, fuse was blown. New fuse, now when I go to start it clicks. But if I bridge starter I can turn over. So does this mean solenoid?
    the solenoid clicks, but no crank. Then you bridge the solenoid and it cranks.....yes, bad solenoid.
    "One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors". Plato .

  10. #10
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    So got everything back together today, went through and checked all other wires, put controls back together. I ordered a new solenoid. Hopefully it shows up quick and solves all my problems!

  11. #11
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    Ok, I am at my wits end with this god forsaken thing. I installed new solenoid, thinking OK great all problems will go away. Wrong. New solenoid in. Still nothing.

    Choke works, test light shows switch doing right thing when I turn key, power to solenoid. I don't understand.

    I think my wiring on the switch is put back the right way. But no way to tell because I apparently have different wires than every other OMC with red plug ever made. Every plug diagram shows I should have a yellow with red stripe wire. And that is for the starter. I do not have this wire.

    And the boat had never had a hiccup before it just decided to not turn over one day.

  12. #12
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    Are you using old or new keyswitch?
    Are you positive fuse in rubber holder is good?
    Did you disconnect battery first if you put in new switch?
    Do you get 12 volt signal to small post of solenoidwhen you turn key? Can you still jump terminals on solenoid and make engine crank?

  13. #13
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    Quote Originally Posted by rochelle howell View Post
    Are you using old or new keyswitch?
    Are you positive fuse in rubber holder is good?
    Did you disconnect battery first if you put in new switch?
    Do you get 12 volt signal to small post of solenoidwhen you turn key? Can you still jump terminals on solenoid and make engine crank?
    Yes, put back in old key switch. New one won't work.

    Yes, disconnected battery before changing anything.

    Yes, fuse is good. Both sides test hot with light and fuse.

    Yes, can still jump terminals and fire.

  14. #14
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    Click image for larger version. 

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    "One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors". Plato .

  15. #15
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    Is your battery fully charged? Do you get 12 volt signal to small post of solenoid when key is turned? Is there 12 volts hot going into back of switch? Check these items for sure!

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