Honda GC190 OHC Engine for reliable start up and power. 187cc, 4-stroke, overhead cam/overhead valve design of engine for high efficiency. Compact combustion chamber, overhead cam design and uniblock construction for reduced fuel consumption. Engine meets EPA and CARB Emission Standards. Maintenance-free, oil bath lubrication system. Precision-ground, highly polished stainless steel pistons for long life. Thermal Relief System protects pump from overheating. Heavy gauge frame components and welded steel construction for durability. 10 in. pneumatic tires for ease of mobility. 1/4 in. x 25 ft. MorFlex high pressure hose is highly flexible, non-marring and kink- and abrasion-resistant. 5 Pro-Style Quick Connect nozzles for versatility in most any cleaning task. Siphon tube for easy detergent application.