I have a 1990 20 HP Johnson that will idle, but dies when I open the throttle much at all. I am open to any suggestions that you might have. Could it be a fuel pump problem? I've had a lean sneezing problem and think I may have fixed it, but could that have damaged my fuel pump? In any case, the Clymer's manual says to set the float level using a special gauge made just for my motor. Do I really have to buy one of these to do this, or can someone else give me the specs for setting the float in another way. Or, does someone have the dimensions for the Johnson float gauge, so I can make my own.