Sierra 18-3104-1 Water Pump Impeller for Johnson/Evinrude Outboard

The Sierra 18-3104-1 is a replacement water pump impeller designed specifically for Johnson and Evinrude outboard engines. This critical cooling system component ensures proper water circulation through your engine to prevent overheating and maintain optimal operating temperature.

Key Features:

• Precision-engineered impeller for reliable water flow and engine cooling
• Direct replacement for OEM impeller in compatible outboard motors
• Designed for use with Sierra water pump kits 18-3394 and 18-3454
• Manufactured from durable materials to withstand marine environments
• Single impeller unit for easy installation during routine maintenance

Regular impeller replacement is essential preventive maintenance for any outboard engine. Marine mechanics recommend inspecting and replacing impellers annually or every 200-300 hours of operation to ensure your cooling system functions properly. Sierra impellers are manufactured to meet or exceed OEM specifications, providing dependable performance at a competitive value.