The alarm and beeping noise on my 2015 Yamaha 40 hp Four-stroke F40LA outboard was going off only while in neutral. The manual stated this was the water level sensor in the fuel filter cup, turned out the manual was correct! In this video I take apart the fuel filter cup, install a new fuel filter, flush the fuel tank and lines, and solve the issue. The control set is a Yamaha 703 Control Box.
I am sure this video will apply to many Yamaha outboards, and other outboard brands as well.
I am not a professional and know very little so please do your own research first as I may not be giving the correct advice.
