I just purchased a boat that came with a 1991 Johnson 120hp outboard. Model #J120TLAIE. Previous owner said that there was a running issue. He said that he had the carbs professionally cleaned, but the problem was not fixed. He also had installed a new battery, spark plugs, and plug wires. I took the boat out on the water and it seems to run good at wot, but the idle is very erratic and has a tendency to stall. Most of the linkage adjustments were all messed up and I have them somewhat closer to where they should be. I put a timing light on it and noticed that the #1 and #4 cylinders were not firing consistently. While resetting the timing, I noticed that the #1 cylinder spark was jumping 180 degrees out of time. I did a few tests following the cdi electronics diagnostics, but their were a few tests that I didn't fully understand. I suspect that the power pack is bad, but I would like to confirm that I'm not missing something else. I have swapped the coils around, but nothing changed. Any productive input would be appreciated.
Thanks
Thanks