I'm Lost!!! I have a 1991 40 Johnson that after 3 min of running @ full throttle, it dropped to 2800 RPM's. Swapped coils and did the same thing, just replaced the ignition modual ( Power Pack ) under the flywheel. Did not go with a OMC Mod. went with a Sierra Brand.. Removed the Plate Sleeve...
I have a 1984 35hp Johnson that runs fine at fast idel or more ( out of water on muffs). At a slow idel it runs rough, jerks like timeing or not enough fuel. Also the motor fouls out plugs 2 to 3 times a year. I can only run the boat at a no wake all the time with the lake rules I live on. So I...
