Sierra Marine 183074 Water Pump Impeller

Use With 18-3148/ 18-3411 Water Pump; Single; Fits Yamaha/ Mercury Marine Outboard Engines

Restore dependable water pump performance with the Sierra Marine 183074 water pump impeller. Designed as a replacement impeller for compatible marine cooling systems, this component helps circulate water through the engine and supports consistent temperature control during operation. A properly functioning impeller is essential for maintaining cooling flow and protecting the engine from heat-related damage.
The Sierra Marine 183074 impeller is designed for service use in marine applications where dependable cooling circulation is required. Its flexible vanes are engineered to work with the water pump housing, creating the flow needed to move cooling water through the system. Replacing a worn, cracked, hardened, or damaged impeller can help restore cooling performance and provide added confidence before regular boating, seasonal use, or extended operation.
For best results, inspect the complete water pump assembly whenever the impeller is replaced. Check the pump housing, wear surfaces, cover, key, gasket, and related components for signs of wear or damage, and replace additional service parts when necessary. Installation should follow the engine or water pump manufacturer’s recommended procedures, including proper lubrication and vane orientation where applicable. Confirm that Sierra Marine part number 183074 matches your engine, pump assembly, and application before installation.

Features:

• Replacement component: Designed to replace a worn or damaged marine water pump impeller in compatible applications.

• Cooling system support: Helps circulate water through the engine cooling system for reliable temperature management.

• Flexible vane design: Supports water movement through the pump housing when properly installed and lubricated.

• Marine service use: Built for replacement and maintenance needs on compatible marine engines and water pump assemblies.

• Application verification: Use Sierra Marine part number 183074 to confirm compatibility with the specific engine and pump assembly.