cdbrummond
Contributing Member
1978 4 hp Mercury (gnat model)
I cant get this thing to run right. the carb has been cleaned twice (ultrasonic) with welch plugs removed, reinstalled and selled with nail polish. every part of the carb is clean and clear. new plugs and compression and spark are strong. i still cant get this thing to idle down. it is a 2 cylinder and i suspect the timing might be a little off. i have a timing light but i cant find any info on where the timing should be at in gear wide open. the only info on the motor is where it should be top dead center. it runs well at full throttle but its mid and idle have issues. this motor seems to have a reputation for being a problem child. any suggestions, other than tieing a rope to it and using it as an anchor, would be greatly appreciated...thanks.
I cant get this thing to run right. the carb has been cleaned twice (ultrasonic) with welch plugs removed, reinstalled and selled with nail polish. every part of the carb is clean and clear. new plugs and compression and spark are strong. i still cant get this thing to idle down. it is a 2 cylinder and i suspect the timing might be a little off. i have a timing light but i cant find any info on where the timing should be at in gear wide open. the only info on the motor is where it should be top dead center. it runs well at full throttle but its mid and idle have issues. this motor seems to have a reputation for being a problem child. any suggestions, other than tieing a rope to it and using it as an anchor, would be greatly appreciated...thanks.