Sierra 18-3073 Water Pump Impeller for Mercury/Mariner and Yamaha Outboards

The Sierra 18-3073 is a premium-quality water pump impeller designed specifically for Mercury/Mariner and Yamaha outboard engines. This replacement impeller is a critical component of your engine's cooling system, ensuring proper water flow to prevent overheating and maintain optimal engine performance.

Key Features:

• 6-blade design for optimal water flow and cooling efficiency
• Manufactured to meet or exceed OEM specifications
• Made from high-quality, corrosion-resistant materials for durability
• Precision-machined for smooth operation and reduced vibration
• Suitable for both freshwater and saltwater marine applications

Specifications:

• Outside Diameter (OD): 1.540 inches
• Bore Diameter: 0.415 inches
• Thickness: 0.485 inches
• Key Width: 0.155 inches
• Number of Blades: 6

OEM Cross-References:

• Mercury Marine: 47-96305M
• Yamaha Outboard: 6E0-44352-00-00
• GLM: 89860
• Mallory: 9-45611

This impeller can be used with Sierra's 18-48619 Complete Water Pump Kit and 18-3473 Water Pump Repair Kit with Housing. Each package includes one impeller. Regular inspection and replacement of your water pump impeller is essential for maintaining your outboard engine's longevity and preventing costly overheating damage.