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    MERCURY 70 BLOWING SWITH BOXES

    I HAVE A 1979 MERCURY 70 WITH THE THUNDERBOLDT IGNITION. ABOUT 30 DAYS AGO THERE WAS NO SPARK GOING TO ANY CYLINDERS. I TRACKED THE PROBLEM TO THE SWITCHBOX AND REPLACED IT. FIRED UP ON FIRST START. NOW, ON ONLY MY THIRD TRIP OUT, IT WOULD NOT START AGAIN. TOOK IT HOME AND FOUND SAME PROBLEM AS...
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    mercury 70 wont fire

    I have a mercury 70 thunderboldt ignition motor. serial #5286242. First I would like to know what year the motor is, I recieved boat with no info. about anything. And as for my problem, i tried to start the motor and it turns over fine, but wont fire up. I pulled one spark plug out to see if i...
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