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    1988 merc 100hp - spark

    at idle speed do all four spark plugs fire or only the top two. I know only the top two get fuel under 1800 RPM's, the bottom two kicking in over 1800.
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    1988 100hp merc What generates the spark to the ignition coils

    I still can't fix my problem of not getting over 2000rpm's two switch box changes haven't fixed it. Some say it can't be the trigger or the stator that is the problem some say it can be. The ignition coils and wires all seem to test fine. I am wondering if the trigger generates enough current to...
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    1988 100hp merc ignition coils

    Is it possible for a faulty spark plug wire or coil to send a spike signal back through your switch box and blow it?
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    talking to a member

    I was doing a search and found a problem the same as mine it does not say in the end how he fixed the problem. Is there anyway to contact a member specifically? I am looking for "Rayford" or "esox" member #1540.
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    100hp 1988 mercury motor

    Does anybody have any information on the current to and from the stator? Something keeps burning out the switch box and cutting out the bottom two cylinders of the motor.
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    1988 mercury 100hp motor

    the bottom two cylinders won't kick in over 1800 rpm. The mechanics say it is an electrical problem, but are stumped as to what. We have replaced the switch box and it worked for 10 minutes and then cut out again. What could the problem be?
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