Replacement Camshaft for 178FS-180FS Air-Cooled Diesel Engines This precision-machined camshaft is a direct replacement for 178FS and 180FS air-cooled diesel engines. Built from high-strength steel with precision-ground lobes, it ensures accurate valve timing, optimal engine performance, and long service life. With a total length of 218mm and key dimensions tailored for a perfect fit, it is ideal for repairing generators, tillers, water pumps, and other diesel-powered equipment.