812966A12 Water Pump Impeller Kit for Mercury Marine 30-60 HP 4 Stroke Outboard Engines Lower Unit Gearcase Replacement 46-812966A12 18-3690 Neoprene

Maintain the peak performance of your marine engine with the 812966A12 Water Pump Impeller Kit. Engineered specifically for Mercury Marine outboard lower unit gearcases, this comprehensive rebuild kit ensures your engine's cooling system operates flawlessly, preventing overheating during prolonged marine use. Designed as a direct fit, this kit replaces OEM part numbers 812966A12, 46-812966A12, 46-812966A4, 46-14334A2, 46-14334A1, 46-812966A6, 46-812966A5, and Sierra 18-3690. It is broadly compatible with Mercury 30 HP, 40 HP, 50 HP, and 60 HP 4-stroke outboard engines, as well as 40 HP Carb 3 CYL, 40/50/60 HP EFI 4 CYL, 40 HP EFI Jet, SeaPro variants, and Formula 60 models. Every component is manufactured from selected materials to withstand harsh environments. The kit features a resilient neoprene impeller for maximum water displacement, a corrosion-resistant stainless steel wear plate, and a durable nylon PA66 tube. Engineered for gearcases with a torpedo diameter of 3.44 inches (87.38mm), it includes non-asbestos gaskets and a long tube seal for a leak-proof assembly. The package provides a complete solution: pump housing, impeller, impeller key, wear plate, pump base, gaskets, seals, O-rings, and stainless steel washers. Install this kit in your lower unit to restore optimal water pressure and ensure reliable boating.

• Precise replacement for your outboard engine. This 812966A12 water pump impeller kit directly replaces part numbers 46-812966A12, 46-812966A4, 46-14334A2, 46-14334A1, 46-812966A6, 46-812966A5, and Sierra 18-3690. Designed for seamless integration into the outboard lower unit gearcase.
• Highly compatible with a wide range of Mercury Marine 4 Stroke outboard engines. Perfectly fits 30 HP, 40 HP, 50 HP, and 60 HP 4-stroke models. Also compatible with 40 HP Carb 3 CYL, 40 HP EFI 3 CYL, 40/50/60 HP EFI 4 CYL, 40 HP EFI Jet 4 CYL, SeaPro models, and Formula 60 engines.
• Built with high-grade components for optimal cooling. Features a durable neoprene impeller, stainless steel wear plate, and a robust nylon PA66 tube. The kit also includes a long tube seal and non-asbestos gaskets to ensure a secure, leak-free seal. Fits torpedo diameter 3.44 inches.
• This complete rebuild kit includes everything needed for maintenance: 1x Tube Seal, 1x Pump Housing, 1x Impeller, 1x Impeller Key, 1x Wear Plate, 1x Pump Base, 2x Gaskets, 2x Plastic Washers, 3x Seals, 2x O-Rings, and 4x Stainless Steel Washers. All parts meet or exceed OEM specifications.
• Essential for maintaining your outboard engine's operating temperature. Regular replacement of the water pump impeller kit prevents engine overheating and costly damage. Designed for the lower unit position, providing consistent and reliable water flow during demanding marine applications.