Sierra 18-3377 Water Pump Kit for JohnsonEvinrude Outboards Sierra replacement water pump kit without housing for JohnsonEvinrude Outboards. This kit contains parts that were manufactured to meet or exceed OEM requirements. Fits JohnsonEvinrude 10 1949-57, 1518 1953-65, 20 1966-73, 25 1969-78 Water Pump Kit Contains 1 18-3002 Impeller 1 18-3103 Impeller Plate 1 18-3326 Impeller Key 1 18-3329 Grommet Interchangeable with JohnsonEvinrude Outboard 0379773 0382468 California Residents WARNING Cancer