Sierra Water Pump Kit 18-3318, Replaces Mercury Marine 47-59362Q08, Stern Drive

The Sierra 18-3318 Water Pump Kit is a complete replacement water pump assembly for stern drive engines, designed to restore proper cooling system operation. Built with an aluminum housing and components engineered to meet or exceed original equipment specifications, this kit provides the parts needed to service the raw water pump on compatible Mercury Marine stern drive applications. Sierra formulates the impeller compound in each kit based on the specific size and application, ensuring the pump delivers reliable water flow to keep the engine running at proper operating temperature.

This kit is a direct cross-reference to Mercury Marine part number 47-59362Q08, making it a straightforward replacement when servicing or rebuilding the water pump on a compatible stern drive unit. It is intended for boat owners and marine technicians performing routine water pump maintenance or replacing a worn or failed pump.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3318
• Material: Aluminum
• Weight: 0.61 pounds
• Vehicle Service Type: Stern Drive
• Package Dimensions: 12.6 H x 7.2 L x 11.4 W (centimetres)
• Country of Origin: Taiwan
• UPC: 808282184544

Fitment

Fits compatible Mercury Marine stern drive applications.

Replaces (OEM)

• 47-59362Q08 (Mercury Marine)

Frequently Asked Questions

What does the Sierra 18-3318 Water Pump Kit replace? It replaces Mercury Marine part number 47-59362Q08, making it a direct-fit alternative for that part number on compatible stern drive engines.

What is included in the 18-3318 kit? The kit includes the water pump components needed to service the raw water pump, including an impeller formulated for the specific size and application of this pump.

What material is the Sierra 18-3318 water pump made from? The housing is constructed of aluminum, built to meet or exceed original equipment specifications.

How much does the 18-3318 water pump kit weigh? The Sierra 18-3318 Water Pump Kit weighs 0.61 pounds.

What type of engine is the 18-3318 water pump kit designed for? This kit is designed for stern drive engine applications, specifically as a service replacement for Mercury Marine 47-59362Q08.

Is the Sierra 18-3318 an OEM or aftermarket part? It is an aftermarket Sierra replacement kit engineered to meet or exceed the specifications of the original Mercury Marine 47-59362Q08 pump it replaces.

Where is the Sierra 18-3318 Water Pump Kit manufactured? The country of origin for the 18-3318 kit is Taiwan.

Can the 18-3318 kit be used to rebuild an existing water pump housing? Yes, the kit is intended for servicing and rebuilding the raw water pump on compatible stern drive units, replacing worn internal components.

What are the packaged dimensions of the 18-3318 kit? The Sierra 18-3318 Water Pump Kit ships in packaging measuring 12.6 H x 7.2 L x 11.4 W centimetres.

Does Sierra formulate the impeller for specific applications? Yes, Sierra formulates the impeller compound included in the 18-3318 kit based on the size and application of the pump it is designed for.