Sierra 18-3245 Water Pump Impeller for Honda Outboard Engines

The Sierra 18-3245 is a premium-quality water pump impeller designed as a direct replacement for Honda outboard engines. This 8-blade impeller is constructed from durable neoprene rubber with copper hubs, engineered to meet or exceed OEM specifications for reliable cooling system performance.

Key Features:

• 8-blade neoprene rubber construction for superior durability and flexibility
• Copper hub design ensures optimal water pumping performance
• Meets or exceeds original equipment specifications
• Extensively inspected and tested for proper bonding and performance
• D-shaped shaft profile for secure installation
• Approximately 1.61 inches outer diameter and 0.91 inches depth

OEM Cross-References:

• Honda: 19210-881-003, 19210-881-A01, 19210-881-A02, 19210-935-003, 19210-ZW9-A02
• GLM: 21740
• Mallory: 9-45100

Impellers are the heart of an engine's cooling system and require regular inspection and replacement under normal operating conditions. Running through silty or sandy water or running a pump dry can damage an impeller quickly and cause engine overheating. Sierra recommends keeping a spare impeller onboard to prevent unexpected failures and costly downtime on the water.