Water Pump Impeller – Fits Johnson/Evinrude OMC 40 HP (Replaces 390286, 18-3366) 115-170HP Pro-Grade Standards — We supply

Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world reliability and longevity

Apply a light coat of marine grease to the inside of the pump housing and the impeller vanes

rough or unstable idle

Brand Part Number Notes Mercury / Mercruiser 830749 Gasket part number Mercury / Mercruiser 8M0204693 Adapter part number reference

or rough idling

Water Pump Impeller – Fits Johnson/Evinrude OMC 40 HP (Replaces 390286, 18-3366) 115-170HP Pro-Grade Standards — We supplyProduct Details This aftermarket Water Pump Impeller is a direct fit replacement for Johnson Evinrude 40 HP 2 Stroke outboard engines from model years 19741976 and 19811987. It is engineered to meet original equipment specifications for reliable cooling performance. This part interchanges with several OEM and aftermarket part numbers, including OMC 390286, Sierra 18 3366, CEF 500353, and Mallory 9 45212. Designed for simple, drop in installation. Made