Each kit includes 1 x nozzle cleaning pin, 1 x siphon tube, 2 x shaft keys, 3 x M8 flat washers, and 3 sets of M8 hex bolts & nuts. An old, worn pump may reduce cleaning efficiency. The power pressure washer water pump is compatible with most front-outlet 180-196cc 6.5-7 HP engines, including Briggs & Stratton, Generac, Devilbiss, Troy Bilt, Honda, and Craftsman.