I ungraded from a Jon Boat to a wide Stumpknocker. It came with a 1995 3 cylinder 60HP Merc. I had the same engine on a boat years ago and it was a good one. When I looked at the boat they guy started it and told me it had not been started for a couple months due an injury. It started right up but was running a little rough. Anyway I bought the boat/motor.
I got it home and started messing with it on the water ears and noticed it seemed to down on power. I checked fire to each cylinder and #3 was out. I replaced that coil and yep it had good power again. I put new plugs in it at the same time. Replaced the fuel filter although it was really clean. This motor has a pop/miss fire on occasion. Not consistent. Knowing it had set for a couple months I went ahead to pulled the carbs for inspection. All were super clean. I ran a fine wire into every orifice while I had them apart and blew out with carb cleaner. When I got to #3 carb I noticed the float was almost half full of fuel. I thought "that is the problem." I bought a new float, set the float level and reinstalled back on the motor. Started it up on the water ears and I still am having the same problem. It starts instantly, idles decent buy when I start to bring the RPM's up I hear a pop then a puff of smoke intermittently.
It starts, runs on all 3 cylinders and has good power. The pop/miss fire is driving me nuts. I read hear that it is better to run 2-strokes with the motor in the water so I took it down to the nearest ramp, backed it in, started it up and was doing the same thing except a bit quieter. lol
I am not mechanically challenged and have built many a hot rod over the years but obviously I am not a Marine expert. Help or suggestions would be appreciated.
I got it home and started messing with it on the water ears and noticed it seemed to down on power. I checked fire to each cylinder and #3 was out. I replaced that coil and yep it had good power again. I put new plugs in it at the same time. Replaced the fuel filter although it was really clean. This motor has a pop/miss fire on occasion. Not consistent. Knowing it had set for a couple months I went ahead to pulled the carbs for inspection. All were super clean. I ran a fine wire into every orifice while I had them apart and blew out with carb cleaner. When I got to #3 carb I noticed the float was almost half full of fuel. I thought "that is the problem." I bought a new float, set the float level and reinstalled back on the motor. Started it up on the water ears and I still am having the same problem. It starts instantly, idles decent buy when I start to bring the RPM's up I hear a pop then a puff of smoke intermittently.
It starts, runs on all 3 cylinders and has good power. The pop/miss fire is driving me nuts. I read hear that it is better to run 2-strokes with the motor in the water so I took it down to the nearest ramp, backed it in, started it up and was doing the same thing except a bit quieter. lol
I am not mechanically challenged and have built many a hot rod over the years but obviously I am not a Marine expert. Help or suggestions would be appreciated.