Water Pump Impeller - 89984T4

Water Pump Impeller - 89984T4 Water pump impeller for Mercury Optimax 2.5L non-pro models (serial No. 1B227000 and above). Replacing a boat's water impeller is crucial because it acts as the key component in the engine cooling system, and if it fails, the engine can quickly overheat due to lack of water circulation, potentially causing significant damage to the engine, including the head gasket, cylinders, and engine block. Provides cooling water to your outboard engine Impeller elastomers provide improved flexibility across broad temperature ranges throughout the boating season Designed for durability to provide higher flow rates and cooling flow to protect your engine Center insert resists tearing to ensure performance For: Mercury OptiMax 2.5L non-pro model engines (1B227000 & above). Fits: 135-175HP Optimax 2.5L V6 (non-pro models) (SN 1B227000 & Above) V-200HP 2.5L EFI (SN 0C100861 – 0C999999) 200HP XS Optimax DFI 6 Cyl. 2.5L (SN 0T235000-1E002110)