Just bought this boat and motor. 1985 Evinrude 40 hp tiller. Starts great and idles fine. Take off out of the hole and it is fine but after about 100 yards you can feel a jerk and then a slow down and can tell it is missing on one cylinder. Replaced the spark plugs but is the exact same way with new plugs. Boat has been stored for the past 9 years but the owner claims he has started it every year. I have fresh gas mixed 50-1 as per this forum recommendation even though it has a tag on the engine stating 100-1. I added about 4 ozs of sea foam gas additive but have not run it enough to see if that has anything to do with it. The owner claimed is was running fine when he quit using it. He is into flying airplanes now and I don't believe he was jerking me around.
Once it starts to miss you can tell is is running on only one cylinder even at idle. Won't come out of the hole etc.
Any ideas?
Leefy
Once it starts to miss you can tell is is running on only one cylinder even at idle. Won't come out of the hole etc.
Any ideas?
Leefy