I have a 1980 merc 60 2 stroke ad have had troubles to keep it running at low speeds. I've checked and changed the spark plugs and the compression, both were fine. i was hoping that someone would have an idea on what is going on.
Have you adjusted the idle screw on the distibutor? Have you touch the low speed screws on the carbs? Have you checked to see if the throtle cable has gotten out of adustment? What exactly does the problem present itself as?
I've had the engine running before at a low idle and it could still run( there was a bit of a sputter). I'm guessing that the issue that caused the sputtering has gotten worse and now i can't keep it going.