The most accurate method for troubleshooting the fuel pump on your Evinrude is to test the pump with a low-pressure fuel gauge while running the motor at various speeds with the propeller attached. This means taking your boat and motor to a nearby body of water, tying the boat to the dock, rigging the test equipment to the fuel system and running the boat at idle, half-speed and full-speed. If the pump is operating properly, you'll find yourself forced to go boating. If the pump is not working properly, change out the pump -- then go boating.