Replacement water pump impeller and hardware for 25/30/40HP outboard motors Key benefits Reliable cooling: The 6blade impeller is engineered to maintain steady water flow to the engine, reducing the risk of overheating and protecting internal components. Corrosion and wear resistance: Critical components use 316 stainless steel and neoprene rubber to resist rust and degradation in demanding marine environments, including saltwater. Exact fit, fast replacement: Designed specifically for 25/30/40HP outboard motors for straightforward installation and plugandplay compatibility with factory mounting points. Durable under load: Built to withstand pressure and extreme operating conditions so the pump maintains performance during extended runs and heavy use. Reduced downtime: Improved material choice and impeller design minimize maintenance intervals and the chance of unexpected failures while on the water. What it does and why it matters Function: Replaces the impeller and related pump components to restore or improve the engine's cooling system. Proper water circulation prevents overheating, preserves engine life, and maintains performance. Compatibility: Fits 25/30/40HP outboard motors without modification. Use this part when the existing impeller shows wear, cracking, or reduced flow. Performance advantage: The 6blade configuration optimizes water movement through the pump housing for smoother, more consistent cooling compared with worn or degraded impellers. Materials and construction 316 stainless steel: Offers corrosion resistance in marine conditions, helping mounting hardware and metal components resist rust and last longer. Neoprene rubber impeller: Flexible and resilient to handle repeated cycles, maintaining seal and pumping action under pressure and temperature changes. Engineered assembly: Components are manufactured and matched to maintain correct clearances and reliable operation in specified outboard models. Typical applications Routine maintenance: the impeller during scheduled service to ensure consistent cooling before peak boating season. Pretrip inspection: Install prior to longdistance runs, coastal cruising, or offshore fishing to avoid engine overheating far from service facilities. Commercial or heavy use: Ideal for rental fleets, guides, or small commercial operators who need durable parts that stand up to frequent use and saltwater exposure. Quick practical notes Intended for 25/30/40HP outboard motors only; confirm model compatibility before . Inspect impeller and pump housing for wear and debris during installation; damaged housings or seals as needed. Proper installation and periodic checks will maximize service life and keep engine cooling reliable. Materials: 316 stainless steel, neoprene rubber Impeller: 6blade design Compatible with: 25HP, 30HP, 40HP outboard motors