My 1976 mercury 115 runs great and revs fully with muffs but as soon as i put it in the water it will start and idle but likes to stall going into gear. When i do get it in gear it will slowly speed up but only get half throttle and wont go over 20 mph. It also doesnt like to start after the motor gets to operating temp if i get it to go and drive it for a bit it wont start back after i turn it off. I bought this boat in june non running and ive fixed it up so far ive cleaned the carbs and i had to take the distributor out and fix the power wire when putting it back in im pretty sure i got all of the spark plug wires in the same spot but not 100%. Im also pretty sure i got the timing correct i couldnt find directions on setting the timing but i found a youtube video and went off that. So idk if i didnt put the distributor back in time correctly or if its somthing different alltogether. I also checked the compression on all the cylinders they were all a healthy 120 psi i also checked spark on all cylinders and they all get really good spark. this is my first 2 stroke motor ive ever worked on so im lost on what could be causeing my problems.