Reflecting the latest advances, this practical manual on outboard mechanics explains the technical theory of operation necessary to prepare for certification or re-certification tests. It empowers users with a basic understanding that will help them troubleshoot and repair quickly and with confidence. Chapter topics include the general use and maintenance of outboard motors, two-stroke and four-stroke operation, two-stroke and four-stroke powerhead, electricity /electronics for the technician, the marine battery, starter system, alternator charging system, ignition systems, fuel system operation, tune-up, midsection/lower unit, trim and tilt system, propeller performance, and boat performance problems. For outboard mechanics, boat owners, and marine dealerships.