Engines & Impellers -Outboard Water Pump Highlights Generic Brand Outboard Water Pump Description: 100% brand new and high quality Marine grade aftermarket parts for Yamaha outboard motors. It is recommended for all marine engines that the water pump be inspected and the impeller replaced annually or every 100 hours of use, whichever comes first. Replaces: 6E0-44352-00-00 For Yamaha P/N Interchange Part Numbers Used For Reference Only Specification: Water Pump Impeller For Yamaha Outboard Motors: F4 4 Stroke 4hp 1999 - 2009 4hp 2 Stroke 1984 1999 5cv 2 stroke 1984 2002 Impeller Dimensions: Number of Blades: 6 Inner Diameter: 11.00mm Outer Diameter: 40.00mm Depth: 12.60mm Package Includes: 1 Piece Water Pump Impeller (Package of 2)