I just bought a 1993 Mercury 9.9 model # 1010201ND. It starts great. It runs flat out great. But in between it sputters and sputs. It is new premium gas. It came with a boat and trailer. What should I do first?
It has one of those funky turn the tiller counter clockwise it goes forward, turn it clockwise it goes in reverse.
Fuel filter is clean. It has one of those adjustable idle speed and prime button combined. It sat for 8 years and I drained and added fresh gas and it started on the 3rd pull. Maiden voyage yesterday showed it would troll and go flat out but ran rough mid range. I will buy a new prop because someone decided the prop shouldn't have a slight curl in the lip. Might look around for a 1993 9.9 operating manual.