I just bought this boat, and it has a seperate resevoir for oil. The resevoir also has a bulb on it, and it looks like some electrical wires going to the top. I am assuming this engine automatically mixes the oil to the correct ratio, but I am not positive. Is there anything I should be doing with the bulb on the resevoir? I have tried to find the ratio but can't find it anywhere. Never had an engine before with this seperate resevoir, always had to pre mix the oil and gas myself. Any ideas?