Re: 1959 johnson 50 hp v4
Yea, it's likely the fuel issue, if the ignition system has been replaced. One thing to do, is unhook the fuel line from the carb and put the end of it in a jar and see how well it pumps while running. One other thing to check too, is how well the fuel flows through the lines and make sure there are no restricions of any kind.
One way to check the prop too, is to draw a line from the center of the hub to the outside, with a magic marker. Check that line after you take it out once and see if the line breaks. Often times a spun hub can be hard to see and that is the best way of checking.
I have the next model size down from yours, in your year.
