Sierra 18-3486 Water Pump Housing for Yamaha Outboard Engines

The Sierra 18-3486 is a replacement water pump housing designed for Yamaha outboard engines. This housing is a critical component of the outboard's cooling system, enclosing the impeller and directing raw water flow to regulate engine temperature and prevent overheating.

Key Features:

• Direct replacement water pump housing for compatible Yamaha outboard engines
• Engineered to meet or exceed original equipment manufacturer (OEM) specifications
• Constructed from durable composite materials designed to withstand harsh saltwater and freshwater marine environments
• Ensures proper impeller seating and optimal water flow for reliable engine cooling
• Backed by Sierra's limited lifetime warranty

Sierra is a leading global manufacturer of aftermarket marine engine and drive parts, with a decades-long history of producing components that fit right the first time. The 18-3486 water pump housing is sold as a standalone housing component. See application guide for compatible Yamaha engine models and OEM cross-reference numbers.