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    Mercury 100 hp rough idle while in gear. Resolved the 3500 rpm problem.

    Well the good news is we finally resolved the motor not running above 3500 rpms. I posted previously about the problems that we had with the motor. We replaced the the stator trigger and switchbox because we didn't have spark on cylinders 3 and 4. That problem ended up being a bad switchbox. I...
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    1989 Mercury 100hp 2 +2 - latest - sputters and won't go over 2000 rpm

    I have had 2 prior posts on this motor and have done everything i thought I could do to try to get it running right. We have gone through the ignition system and now have a new CDI stator, new mercury trigger and as of a couple days ago a new Mallory switchbox and can?t seem to figure out what...
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    1989 Mercury 4 cylinder switchbox question 2 wire red stator or 4 wire black stator.

    Unable to find any tech info on the make up of a mercury 4 cylinder switch box, I was wondering if someone could give me some info on a swithbox working correctly. We have a 1989 mercury 100hp that had a mercury red stator with the two wires (blue and blue/white) connected to what looked to be...
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    1989 Mercury 100hp 4 cylinder, rough running, no power, won't get over 3500 rpm

    Hello, I am hoping may get some direction on helping trouble shoot a 1989 Mercury 100hp 4 cylinder Motor. We purchased it used and the motors powerhead had been rebuilt and the motor started upon installation on the boat but never ran correctly. We couldn't get the boat on plane and initially...
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