RiverBlazer
New member
So I've got a 2005 Mercury 25/20 jet where to me it is running on one cylinder at idle or low speed then when I give it a little throttle it is like I flip a switch and the second cylinder kicks in and runs perfect all the way to full throttle. It has always ran perfect and started very easy before this issue. I always run the gas out every time. I run non ethanol gas and put a little star tron in the tank as well. It doesn't sit for more than a couple of weeks, fish in winter as well. I called a boat dealer and told the mechanic what was going on and he mentioned checking the pilot jet, I took the carb off and apart and the only jet I saw was the one inside the float bowl drain screw which I thought was the main jet. Anyways there was no dirt inside. To me I'm thinking a coil is going bad or maybe the cdi box. Anybody had this issue or can somebody give me some advise on what you think. Thanks in advance.