I am having trouble with yamaha 90 oil injection leaking. It seems wet around black plug on lower half that have wires coming out of. I got back last trip and oil tank was empty. Kind of scared me but no engine problems. I put oil in tank and it leaked out to the level of the "L" even with the afore mentioned black plug. I wiped down foot yesteday and oil in picture appeared since yesteday. It is running down through the bottom of engine cover down the foot. Cant catch fish with oil leaking. Can you help me with troubleshooting.