OMC Evinrude Johnson Water Pump

The OMC Evinrude Johnson water pump, part number 389980, is a replacement water pump and impeller kit designed for Johnson and Evinrude outboards. It includes the housing with a stainless steel liner, the impeller, and all necessary parts (except the impeller key), along with the impeller Housing Gasket(323311) and impeller plate gasket 

Here's a more detailed breakdown:

Complete Kit:

It's a complete kit, offering a convenient solution for replacing the entire water pump assembly

Housing with Stainless Steel Liner:

The kit includes a new housing with a stainless steel liner for durability and longevity, 

Impeller

The impeller, responsible for circulating water through the engine cooling system, is included. It's important to note that this impeller might be different from impellers in earlier pumps.

Gaskets The kit includes the necessary gaskets (Impeller Housing Gasket and Impeller Plate Gasket) for proper sealing.

Key Not Included

The Impeller Key is not included, 

Impeller Part Number

The impeller in this kit is part number 0389983, which supersedes 0763982