Sierra 18-30778 Water Pump Impeller Kit for Volvo Penta

The Sierra 18-30778 is a premium replacement water pump impeller kit designed for Volvo Penta gasoline sterndrive engines with GM powerplants. This complete impeller kit is engineered to meet or exceed OEM specifications, providing reliable cooling system performance for marine engines.

Key Features:

• Neoprene construction for durability and chemical resistance
• Complete kit includes impeller, gaskets, O-rings, and lubricant
• Designed for 2005.5 and newer Volvo Penta gas sterndrives with GM engines (3.0L, 4.3L, 5.0L, 5.7L, 8.1L)
• Direct replacement for Volvo Penta OEM part numbers 21213664, 3842786, 3595485, 3584350, 3588914, and 3841696
• Fits engines where the raw water pump mounts on the crankshaft with different size hoses

Impellers are critical components of your marine engine's cooling system and require regular inspection and replacement. Running a pump dry or operating in silty or sandy water can damage the impeller and cause engine overheating. This Sierra impeller kit ensures proper cooling water flow and helps prevent costly engine damage. Always keep a spare impeller kit onboard for emergency repairs.

Note: This kit is specifically designed for late 2005 and newer models with different-sized cooling hoses. It will not fit early 2005 and prior models that use the same size hoses on the pump.