For MerCruiser Alpha I Units S/N 6854393 - 0D469858. Sierra Impeller repair kits are made from high-quality rubber compounds, stainless steel, and composite plastics to withstand harsh marine environments. Our kits circulate water for optimal temperature regulation - preventing overheating and costly engine repairs. Engine-specific water pump repair kits meet or exceed OEM standards.

Kit Includes

• O-Ring
• Drain Screw Gasket | 18-2945-9
• Gasket, Water Pump | 18-2915-9
• Gasket, Water Pump | 18-2914-9
• Gasket, Water Pump | 18-2919-9
• Gasket, Water Pump | 18-2801-9
• Gasket, Water Pump Base | 18-2826-9
• Seal Ring | 18-2944-9
• Impeller | 18-3017
• Water Tube Guide | 18-3109
• O-Ring | 18-7173-9
• O-Ring | 18-7176-9
• O-Ring | 18-7158-9
• O-Ring | 18-7162-9
• O-Ring | 18-7426-9
• Water Pump Housing Bushing | 18-3110
• Water Pump Housing | 18-3116
• Water Pump Base | 18-3420
• Impeller Plate | 18-3117