Neoprene Impeller Kit | Sierra 18-3079 Pump repair kit includes impeller, gaskets, & drive screw. Sierra impeller kit 6 blade Neoprene for water pump applications 1 9/16 in. diameter x 3/4 in. width Replaces Johnson Pump 09-806B Replaces Jabsco 4528-0001 Replaces Sherwood 09979 Replaces Universal 262285 Replaces Volvo Penta 803729, 875807, 3586498 Replaces Yanmar 104211-42070