821354A2 Water Pump Impeller Repair Kit for Mercury 25 30 40 45 50 HP Outboard Engine Cooling System Service Compatible with 46-821354A1 Replacement Sierra 18-4531 GLM Marine 12045

Water Pump Impeller Repair Kit - Fits Mercury Mariner Marine Outboard 25 30 HPIt helps support engine cooling and maintain water flow for your boat's performance on the water.Compatible for Mercury Mariner Marine Outboard Motor Models(Verify your engine year and displacement):Fits Mercury Mariner 25 hp Four Stroke Carb 0G590000 - 0T408999.Fits Mercury Mariner 30 hp 4 Stroke Carb 0G760300 - 0T408999.Fits Mercury Mariner 30 hp Jet 0G590000 - Up.Fits Mercury Mariner 30/40 Hp (2 Cyl) 0G053314 - Up.Fits Mercury Mariner 40/45 HP Four Stroke 2:1 0G760300 - 0t408999.Fits Mercury Mariner 45 HP Four Stroke Bodensee 0G231123 - Up.Fits Mercury Mariner 40 Hp (3 Cyl) 0G531301 - Up.Fits Mercury Mariner 50 Hp (3 Cyl) 0G590000 - Up.Fits Mercury Mariner 50 Hp Four Stroke 0G231123 - Up.Fits Force 40 50 HP 1995-1997.Feel free to share your engine serial number for compatibility confirmation.Replaces Part Numbers:Replaces Mercury Mariner Marine Outboard 821354A2 46-821354A2Replaces Mercury Mariner Marine Outboard 821354A1 46-821354A1 821354A04Replaces GLM Marine 12045 Replaces Sierra SEI West Marine 18-4531 Package Include:1X Water pump impeller 47-850893, 85089-3, 8508910, 850892, 850891, 8M0027792, 8M0024502.1X Impeller Key1X Plate, wear 82135421X Gasket Upper 27-8221891X Gasket Lower 27-8222171X Seal short 430231X Seal long 82354712X Washer 12-866451please refer to the images for details.Key Features of Our Kit:Neoprene rubber impeller resists saltwater corrosion for pumping performance and service life.Drop-in design for DIY installation: ready in minutes with basic tools.Materials tested for heat resistance abrasion and operation in fresh or saltwater conditions.Why Regular Impeller Replacement MattersThe impeller draws in water to circulate through the engine for heat dissipation. Over time saltwater exposure debris dry running or wear can cause the rubber blades to crack deform or break off—reducing water flow and risking engine damage like warped cylinders or seized pistons. Marine sources suggest inspecting and replacing it every season or after 100 hours of use to help avoid repair costs and support performance.

• The Water Pump Impeller Repair Kit is designed for Mercury Marine 25HP 30HP 40HP 45HP 50HP outboard motors. It helps keep the cooling system running smoothly during regular boating use
• The Outboard Impeller Kit for Mercury Mariner Marine Outboard 821354A2 46-821354A2 is also compatible with Sierra 18-4531 GLM Marine 12045
• The Aftermarket Replacement Water Pump Repair Kit for Mercury includes components: a rubber impeller, Key, Gaskets, Wear Plate, Seal short, Seal long, Washer
• The Water Pump Service Kit helps restore cooling performance by replacing worn parts that may cause overheating reduced water flow or water pump failure over time.
• The Marine Cooling System Impeller Repair Kit is recommended for seasonal or 100-hour maintenance and helps prevent unexpected cooling problems when operating in seawater shallow areas or waters with debris.