The Adlard Coles Book of Outboard Motors, previously known as The RYA Book of Outboard Motors, is aimed at boatowners, rather than experienced mechanics. Covering both 2 and 4 stroke engines, it explains how even the most sophisticated of modern outboards use simple processes to convert fuel to power, and then looks at each of the sub-systems that allow those processes to take place: the fuel system, the ignition system, cooling and lubrication, the electrical system, transmission and controls.
The book includes sections on routine maintenance and fault finding, and even has a photo sequence showing the vital first aid required to save the life of an outboard engine that has been dropped overboard! It will be a boon to anyone who puts to sea with an outboard engine.