Growing Power in a Growing Market

The evolution of Kohler engines is discussed, particularly with respect to the higher horsepower engines used in suburban power equipment. Bore and stroke, horsepower and torque, valve timing, volumetric efficiency, cooling, and crankshaft design are some of the areas explored. The author treats Automatic Compression Release extensively, and concludes that this mechanism eliminates the necessity of a spark retard mechanism, simplifies choking, reduced cost because less costly magnetos of single magnet construction may be used, and easy cold weather starting, to cite a few advantages.