KOBELKA2277
Cadet
- Joined
- May 23, 2008
- Messages
- 17
Hello,
I have a 1999 mercury optimax 150 hp. I have been having trouble with it not idling. Very rough and stalls often. It runs above idle like a dream, smooth and powerful. I changed the plugs which looked fine, I changed the fuel filter with no results. The other day I did 2 things and the problem seemed solved. It sat and idled smooth for an hour. The two things that I did were check all fuel line joints for snugness and got air out of the fuel line which seemed trapped, the primer bulb seemed inflated with air not gas, which I corrected by removing the fuel line at the engine and then pumping the bulb for a while into a can to remove air. Then I noticed at the back of the engine there are 2 black rectangular stacks with fuel lines going to them and three electrical plugs on each one having # 1, 3 and 5 the other having 2,4 and 6. I assumed that these were something to do with the pressurized fuel delivery as they had air chucks on the tops of them as you would see on a tire to fill with air. I removed the black cover and depressed the center pin and a small gasp of pressurized air came out. On the one on the drivers side of the engine when depressed a squirt of gas came out. Then I started the engine on mid range rpm's and again depressed the centers of the air nozzles while running. The passenger side one blew out a continual mist of mostly air with a mist of fuel and made the engine run rough like starved for fuel. The drivers side nozzle blew out pure pressurized fuel hardly any air if any. Back I went to the passenger side nozzle pressing it letting air escape thinking fuel would eventually come but it didnt.
To make a long story short I put it back together and that is when it idled perfect for about an hour. Then I shut it off again and went back an hour later and right back to not idling again.
Today I changed the fuel lines and primer bulb and still idles rough.
Does anyone know if both the air nozzles on the tops of those 2 stacks when depressed should blow out fuel mist or pure fuel and what might be the cause.
Thanks in advance
kobelka
I have a 1999 mercury optimax 150 hp. I have been having trouble with it not idling. Very rough and stalls often. It runs above idle like a dream, smooth and powerful. I changed the plugs which looked fine, I changed the fuel filter with no results. The other day I did 2 things and the problem seemed solved. It sat and idled smooth for an hour. The two things that I did were check all fuel line joints for snugness and got air out of the fuel line which seemed trapped, the primer bulb seemed inflated with air not gas, which I corrected by removing the fuel line at the engine and then pumping the bulb for a while into a can to remove air. Then I noticed at the back of the engine there are 2 black rectangular stacks with fuel lines going to them and three electrical plugs on each one having # 1, 3 and 5 the other having 2,4 and 6. I assumed that these were something to do with the pressurized fuel delivery as they had air chucks on the tops of them as you would see on a tire to fill with air. I removed the black cover and depressed the center pin and a small gasp of pressurized air came out. On the one on the drivers side of the engine when depressed a squirt of gas came out. Then I started the engine on mid range rpm's and again depressed the centers of the air nozzles while running. The passenger side one blew out a continual mist of mostly air with a mist of fuel and made the engine run rough like starved for fuel. The drivers side nozzle blew out pure pressurized fuel hardly any air if any. Back I went to the passenger side nozzle pressing it letting air escape thinking fuel would eventually come but it didnt.
To make a long story short I put it back together and that is when it idled perfect for about an hour. Then I shut it off again and went back an hour later and right back to not idling again.
Today I changed the fuel lines and primer bulb and still idles rough.
Does anyone know if both the air nozzles on the tops of those 2 stacks when depressed should blow out fuel mist or pure fuel and what might be the cause.
Thanks in advance
kobelka
