I've got a 1991 Mercury 135 "Black Max" two-stroke that's been sitting for some years but ran when parked. In working on the motor, I've gotten it to run sloppily but never to idle and stay idling. When I had first got the motor, I only checked one plug and ripped into getting it running (impatient), but now with how it's running I've concluded that one bank is missing spark (starboard side). From what I can tell, the coils look to be individual from one another, which makes me think that the whole bank going bad is something other than the coils, and I was just wondering where I need to start my troubleshooting and what to do as I'm quite the novice when it comes to outboards. Any help or just general direction is very appreciated, thanks!
