johnandmariap
New member
I have a 1971 Johnson 100 hp model 100ESL71C. I have adjusted the idle speeds both high and low and while trying to get the boat to plane the engine bogs down. At full throttle it only goes about 1/2 speed for a short time then bogs down for a few seconds then goes back to 1/2 speed.Does this sound like a fuel pump issue or something more complex???? It starts fine and idles fine,just seems when it needs more fuel it can't get it!!