Perhaps some of you have had this issue and can help me:
I have a 1992 Mercury Mariner 60hp that I am having power and ignition issues with. The problem only seems to exist when I have been running the motor for a long period of time and working it hard such as running out in the ocean. The problem acts like a fuel demand issue. The motor will run along fine but then after a while 30 min or so, it will hiccup and stop. Then it I will start it back up again and hit the throttle only to have it sputter and die. Then I will start it up again and ease the throttle to about 1/4 but then when I give it any more it will sputter and die. I have completely gone through the fuel system including filter, pump, and even drained the tank. It seems to be getting plenty of fuel. I put brand new spark plugs in for this last trip out where it acted up again. I am wondering if it might be related to the coil or other ignition parts. It only seems to do this after it heats up and has been running for a while. If I let it cool down and get cold I can run it again for a period of time (30 min) before it starts acting up again. I have only experienced this problem in big water such as the ocean or large bay. Is there a way to check the electrical components to see if that is the problem? Do you think it is electrical? Is there an other possible cause to this issue that I have missed?
Thanks
DF
I have a 1992 Mercury Mariner 60hp that I am having power and ignition issues with. The problem only seems to exist when I have been running the motor for a long period of time and working it hard such as running out in the ocean. The problem acts like a fuel demand issue. The motor will run along fine but then after a while 30 min or so, it will hiccup and stop. Then it I will start it back up again and hit the throttle only to have it sputter and die. Then I will start it up again and ease the throttle to about 1/4 but then when I give it any more it will sputter and die. I have completely gone through the fuel system including filter, pump, and even drained the tank. It seems to be getting plenty of fuel. I put brand new spark plugs in for this last trip out where it acted up again. I am wondering if it might be related to the coil or other ignition parts. It only seems to do this after it heats up and has been running for a while. If I let it cool down and get cold I can run it again for a period of time (30 min) before it starts acting up again. I have only experienced this problem in big water such as the ocean or large bay. Is there a way to check the electrical components to see if that is the problem? Do you think it is electrical? Is there an other possible cause to this issue that I have missed?
Thanks
DF