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1972 100ES runs rough

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  • 1972 100ES runs rough

    The motor wouldn't run at all with no spark so I replaced the power pack which I have done before. The motor starts and runs but will start to miss after a minute or so. I did not replace the plugs when I replaced the power pack but I intend to before I try the motor out again in the spring. Motor did not seem to be running hot. Any other suggestions?

  • #2
    I'd say start with the 3 basics of all outboard motor service:
    Compression (all 4)
    Spark (all 4) especially while missing.
    Fuel supply.
    If you are getting compression, spark and proper amount of fuel (not flooding or leaning out) - and if your timing is right - that motor has to run. Now, it may get hot, or it may spin a prop. But it has to run otherwise.

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