An outboard engine's water pump is driven by the driveshaft. Here the author is shown sliding the water-pump housing into place. John Tiger Salt, sand, and debris take their toll on your outboard's ...

Impellers (also spelled impellors or impellars) are rotating devices designed to alter the flow and/or pressure of liquids, gases, and vapors. Impellers consist of various vanes — often blade-shaped — ...