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  1. M

    1979 Mercury 90 hp in line 6 No Spark

    Re: 1979 Mercury 90 hp in line 6 No Spark Thanks for the response. After looking through CDI's instruction manual for the harness you are right. I did not connect a red jumper from the rectifier to the red terminal on the switchbox. The manual does not state that this is needed. Do you know...
  2. M

    1979 Mercury 90 hp in line 6 No Spark

    Good Morning, I have a new project that I am working on. It is a '79 Merc Inline 6 90 hp with serial number 5160916. Compression is in check and I was looking at a fuel issue in which I found and fixed corroded lines. In that process I made a mistake and did not disconnect the battery, when...
  3. M

    No Fire on cylinders 2,4,6

    Hello, long time reader but first time poster here. I have a 1988 Sea Ray Laguna 23 with dual Mercury 135 V6's with the same year engines. The motors are the white Sea Ray editions. After spending $1000 dollars in the spring to get them running "right", the engines ran flawlessly for about 20...
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