FASWORX Premium V4 Outboard Water Pump Rebuild Kit (Replaces OEM 439140) Don't let a failing water pump end your day on the water. The FASWORX Premium Water Pump Repair Kit is engineered to deliver reliable, professional-grade cooling performance that outlasts standard aftermarket alternatives. Whether you are running offshore in saltwater or cruising the lake, this kit ensures your outboard maintains optimal operating temperatures under extreme conditions. Built Better with Advanced Material Science We designed this kit using premium materials to combat the most common causes of water pump failure: dry rotting, chemical degradation, and saltwater corrosion. EPDM Rubber Impeller: Scientifically engineered to maintain its structural integrity and flexibility, providing maximum water flow and resisting the friction that destroys standard rubber. 316 Stainless Steel Components: The high-gauge insert cup and wear plate provide a frictionless, corrosion-proof barrier that protects the housing from scoring. Chemical-Resistant Alloy Housing: Replaces cracked or warped factory housings with a highly durable, dual-tube specific mold. Precision Marine Gaskets: High-tolerance seals and O-rings ensure an airtight fit to eliminate pressure leaks.