Description This Sherwood rubber impeller kit 18000K-SHW provides a complete replacement impeller assembly for marine engine cooling pumps fitted to Caterpillar 3176, 3196, 3406, 3406C, 3406E and Cummins QSM11 engines. Cross References/Supersedes: Caterpillar 2820683, 1095324, 1095327, 1230492, 1239785; Cummins 4019403, 4933743. Neoprene 12-blade impeller with 14-tooth spline drive for reliable raw water pumping. Impeller dimensions: 95 mm diameter, 102 mm width, 23.8 mm shaft diameter. Kit includes impeller, O-ring and service instructions for straightforward maintenance. Fits Sherwood G1801, G1804, G1805, G1806, G18061-01, G1807, G18071-01, G1808, G18081-01, G18082-01, G1810-01, G1811-01, G1815-01 and G1816-01 raw water pumps.