Re: 1962 Johnson 3 hp. fuel shut off.
They sell little inline fuel shutoff valves at decent hardware stores. You need a brass fitting that will screw into the tank and has a nozzle on the other end to accept a fuel line, a brass fitting that will screw into the carb and has a nozzle on the other end that will accept a fuel line, a small inline shutoff valve, eight inches of small engine fuel line, and four clamps.