4785089 Water Impeller (also referenced as 47850893, 478508910, 478M0024502, 478M0027792, 183057) — replacement water impeller for outboard boat motors Key benefits Restores proper cooling flow: replaces worn or damaged impellers to restore engine cooling and prevent overheating. Reliable field : a compact, serviceable part that gets engines back on the water quickly. Direct fit for matching part numbers: designed to impellers listed under the referenced OEM numbers for straightforward swapin replacement. What this part does (functionality) Pumps raw water from the lower unit into the engine cooling passages to maintain operating temperature. Replaces deteriorated or damaged impeller blades that reduce water flow and risk engine overheating or damage. Operates as a critical component of routine outboard motor maintenance and preseason service. Compatibility and identification Supersedes or corresponds to these part numbers: 4785089, 47850893, 478508910, 478M0024502, 478M0027792, 183057. Intended for outboard motors that specify any of the listed part numbers. Confirm compatibility by checking your engine's parts list or service manual against these numbers. Key attributes Purpose: Replacement water pump impeller for outboard boat motors. Fitment: Direct replacement when your engine's required part number matches one of the numbers listed above. Performance: Restores proper water flow and cooling efficiency when installed correctly. Service role: Routine maintenance item — at manufacturerrecommended intervals or when signs of wear appear (reduced water flow, irregular discharge, cracked or missing blades). Typical use cases Routine maintenance: the impeller during scheduled service to maintain optimum cooling performance and avoid unexpected engine overheating. Emergency on the water: Swap in a replacement impeller if you notice reduced cooling water flow while boating to protect the engine until a full service can be completed. Seasonal recommissioning: Install a impeller when preparing an outboard for the boating season after storage to ensure reliable cooling from the first use. Installation notes and recommendations Verify the required part number for your engine before to ensure correct fit. Inspect the water pump housing, wear plate, and drive key when replacing the impeller and any worn components as needed to ensure proper operation. Follow engine manufacturer torque and installation procedures as described in the service manual. Why choose this replacement impeller Intended as a direct replacement for engines using the listed OEM part numbers, offering a fast, compatible solution to restore cooling system function. Helps prevent heatrelated engine damage by restoring the correct water flow when installed as part of regular maintenance or emergency . For results, confirm part number compatibility with your engine documentation prior to installation.