Third Edition features more than 50 percent new material This popular, money saving-guide to fixing engines that power garden equipment, pumps, and standby generators shows you how to tackle just about any maintenance and repair job with professional results. Revised and updated to include the latest small engine technology, this step-by-step resource features new information on overhead valve and cam engines, advances in float-type and diaphragm carburetors, new digital ignition systems, advances in pollution-control devices, and more.