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  1. #1
    cheatin' piston popper addicted's Avatar
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    mariner outboard help

    I figured since the block is made by yamaha it would be ok to post this here. . . If not, I apologize.

    I have a mid 80's mariner 3 cylinder 60 horse on my pontoon boat. It is the same as the mercury version but painted grey. This year it started acting up. I have the factory service manual, and tested everything, but still no spark.

    Her's what I know:

    The stator ohm's out OK.

    The coils ohm out OK

    The rectifier is bad, but that shouldn't affect starting, right?

    The ignition switch is intermittent when in the run position, but I jumped it.

    kill switch is working properly.

    neutral switch is working properly

    The mercury switch has been disconnected as a precaution, but does not affect the symptoms.

    Plugs and wires are OK.

    I tried 2 cdi boxes with the same results


    Basically, I went through the entire electrical system troubleshooting procedure as per the factory service manual, and still have no spark. I don't want to replace the known bad stuff until I figure out the spark issue so that I can order all the parts at 1 time, unless these seemingly irrelevant parts can cause a loss of spark.

    any ideas?


  2. #2

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    Try the following, disconnet the black and yellow wire were it enters the cdi and try to start it. I know that the stators have also been giving problems, if you were to have a black stator that can most probebly be the probleme. if it were to be red then the probleme is some where els.

  3. #3

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    I'm not sure about your motor but most stators put out an AC charge. And if the cdi is looking for dc, that might be your problem. Replace the rectifier and go from there. Do you know if the system is all ac?
    Mike

  4. #4
    cheatin' piston popper addicted's Avatar
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    Thanks for the tip markus. I'll try it and let you know. I am pretty sure it's a black stator. or maybe blue?. . .

    Mike, The stator does put out ac and the rectifier turns it into dc, but as far as i know, the starting and charging circuits are not dependant on each other.

  5. #5
    XLTNoob
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    The starting and charging circuits are not dependant on each other - HOWEVER - if the input voltage to the CDI drops below 9 volts, it won't spark.

    Voltage during cranking can easily dip below 9v.

    My money's on the rectifier.

    mabye disconnect power to the CDI and hook it up exclusively to a spare battery?

  6. #6
    cheatin' piston popper addicted's Avatar
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    Hmmm. good point. I did have a charger on the battery the whole time i have been screwing with it though.

    Maybe you guys are on to something. At first, it would not want to rev up. it would idle and start fine, but would surge in and out like 1 carb was plugged. I played with the carbs and got it running pretty good for 2 weks or so, then it just wouldn't start.

    I did see a very faint spark twice when I was cranking it with the plugs out, but nothing on the spark tester.

    anuone know witch wire is the power for the cdi? red? The boat and book are at the lake, but I will try all your suggestions this weekend.

    THANKS!!!

  7. #7

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    RED = battery power via fuse (20 amp)
    PURPLE - switced battery power via ign switch
    BLACK = ground battery
    YELLOW = ac power from stator
    BROWN = rev counter
    BLACK/YELLOW = kill switch
    YELLOW/RED = starter selenoid

  8. #8
    cheatin' piston popper addicted's Avatar
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    I had a chance to look at it today.

    disconnecting the black/yellow to the cdi didn't change anything.
    Cranking volts are 10.5minimum, usually around 11.5.
    no voltage at red or purple wire on cdi at any time.
    there is 12V on the blue wire when cranking.
    Black stator
    no spark still

    so, if there is no voltage at the red wire going to the cdi, that means that the problem is in the wiring harness, or elsewhere?

    any ideas?

    Thanks again!

  9. #9
    i think that stator have a high speed and a low speed control. if the low speed does work , the motor will not give start or give spark. might want to give that stator another check.

  10. #10
    i think that stator have a high speed and a low speed control. if the low speed doesn't work , the motor will not start or give spark. might want to give that stator another check.

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