Sierra 18-3116 Marine Water Pump Housing

The Sierra 18-3116 is a premium replacement water pump housing designed for Mercury and MerCruiser stern drive and outboard engines. This upper pump housing is engineered to meet OEM specifications, providing reliable performance and proper cooling water flow to prevent engine overheating.

Key Features:

• Durable plastic body construction for long-lasting performance
• Integrated stainless steel impeller cup reduces wear and provides smooth impeller operation
• Precision-engineered to meet Mercury and MerCruiser OEM specifications
• Direct replacement for worn or damaged water pump housings
• Compatible with Sierra 18-3109 Water Tube Guide and 18-3110 Water Pump Housing Bushing

OEM Cross-References:

• Mercury/MerCruiser: 46-96148A1, 46-96148T1, 46-96148T, 46-64141A1, 46-48743A1
• GLM: 12410
• Mallory: 9-43211

Over time, water pump housings can wear and deteriorate, resulting in reduced water flow and pressure that may lead to engine overheating. Replacing the pump housing along with the impeller restores proper cooling water supply and helps maintain optimal engine operating temperature.