I am working on a 1995 50 HP 3 cylinder Johnson outboard. Initially the motor was not firing on the 3rd cylinder. The motor would get up on step and drop rpm and then it would kick in again. Very sporatic. There is good compression in all 3 cylinders. All 3 ignition coils are working. I changed out the timer base. Some tests I did following a Clymer manual pointed to the timer base being the culprit. The base was partially melted in one spot. The erratic sparking on the 3rd cylinder still occured. I now have purchased a power pack. All three cylinders have good spark, but now #1 cylinder is out of time 180 degrees. I checked the flywheel key...not sheared. I know I purchased the correct power pack. I am stumped.