Need to find out why my 1972 100hp Johson outboard is over charging the battery to 18- 20 volts at high speed.
Something blow the req.. New pulse pack, coil. And I was told to remove clipper module. It looks like the only thing that shuts down the stater is the clipper circuit takes stater the ground.
Motor runs great.
I believe you have an unregulated system, and unregulated systems will do that. Some batteries work better with unregulated systems than others. Sometimes newer batteries solve the issue. Unless you make very long high speed runs you have nothing to worry about. If it bothers you, turn on all the lights and accessories you can. Voltage should drop a little, and keeps from overcharging the battery.