WaveCrasher
Recruit
- Joined
- Mar 17, 2014
- Messages
- 2
Hello. Long time visitor, first time poster.
I have a 1991 Johnson 60 HP with 3 carbs. Under throttle the engine runs smooth and fantastic. At low idle the engine misses and runs rough. I've looked at many posts here and have followed the recommendations. I have changed the spark plugs (Champion) about 7 months ago when I bought the boat. I just changed them again. They look fine with a little blackness and some oil but no build up. I have cleaned the carbs and adjusted the air intake valves to 1-1/2 and to 2 turns out from seated but it still wants to miss and idle rough. My idle seems high and runs at 2000 rpm if my gauge is correct. Much lower and the engine wants to stall. During idle engine runs from 1800 to 2200 as it misses. I think I need to adjust the needle valves but I do not know how to do this. Or it could be other things. Fuel filter or ball valve maybe? I can give more info if you need but I need help please.
I have a 1991 Johnson 60 HP with 3 carbs. Under throttle the engine runs smooth and fantastic. At low idle the engine misses and runs rough. I've looked at many posts here and have followed the recommendations. I have changed the spark plugs (Champion) about 7 months ago when I bought the boat. I just changed them again. They look fine with a little blackness and some oil but no build up. I have cleaned the carbs and adjusted the air intake valves to 1-1/2 and to 2 turns out from seated but it still wants to miss and idle rough. My idle seems high and runs at 2000 rpm if my gauge is correct. Much lower and the engine wants to stall. During idle engine runs from 1800 to 2200 as it misses. I think I need to adjust the needle valves but I do not know how to do this. Or it could be other things. Fuel filter or ball valve maybe? I can give more info if you need but I need help please.