Melanie Bartlett 
The Adlard Coles Book of Outboard Motors [PDF ebook] 

Aimed at boatowners rather than experienced mechanics,
The Adlard Coles Book of Outboard Motors
is a boon to anyone who puts to sea with an outboard engine. Covering
both 2 and 4 stroke engines, the book 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!

»Explains in clear, jargon-free English how an outboard works and how to look after it»
Kelvin Hughes

»An excellent book, well thought out and well written»
Motorboats Monthly