Sierra 18-3373 Water Pump Kit with Housing for Yamaha Outboard, Replaces 6E5-W0078-A1-00

The Sierra 18-3373 Water Pump Kit with Housing is a complete replacement water pump kit for Yamaha outboard motors. Unlike the Sierra 18-3372 kit, which is sold without a housing, the 18-3373 includes the water pump housing along with the internal wear components needed to restore cooling system performance. The kit is built around aluminum construction for the housing and related parts, giving it the durability needed for continuous exposure to raw water cooling flow.

Inside the kit, buyers get the water pump gasket (Sierra part 18-0244, OEM equivalent 6E5-44315-A0-00), four mounting bolts (Sierra part 18-0256, OEM equivalent 97095-08045-00), and the impeller (Sierra part 18-3071) that does the actual work of pumping cooling water through the outboard. Supplying the housing along with these wear parts in one kit means the water pump can be rebuilt or replaced in a single job rather than sourcing the housing separately.

The Sierra 18-3373 is a direct replacement for Yamaha OEM part number 6E5-W0078-A1-00, and it is engineered to meet or exceed the performance of the original equipment part it replaces.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3373
• Product Type: Water Pump Kit with Housing
• Material: Aluminum
• Weight: 1.55 pounds
• Fitment: Yamaha Outboard Motor
• Kit Includes: Water Pump Housing, Gasket (18-0244), Bolts Qty 4 (18-0256), Impeller (18-3071)
• Gasket OEM Equivalent: 6E5-44315-A0-00
• Bolt OEM Equivalent: 97095-08045-00
• UPC: 030999755865

Fitment

• Yamaha Outboard Motor

Replaces (OEM)

• 6E5-W0078-A1-00

Frequently Asked Questions

Does the Sierra 18-3373 kit include the water pump housing? Yes, the 18-3373 kit includes the water pump housing. This is the main difference from the Sierra 18-3372 kit, which is the same components without a housing.

What OEM part number does the 18-3373 replace? The Sierra 18-3373 water pump kit replaces Yamaha OEM part number 6E5-W0078-A1-00.

What is included in the Sierra 18-3373 water pump kit? The kit contains a water pump housing, a water pump gasket (Sierra 18-0244, OEM equivalent 6E5-44315-A0-00), four bolts (Sierra 18-0256, OEM equivalent 97095-08045-00), and an impeller (Sierra 18-3071).

What engines does the 18-3373 water pump kit fit? The Sierra 18-3373 water pump kit is designed for Yamaha outboard motors.

What is the water pump kit made of? The Sierra 18-3373 water pump housing and its components are made of aluminum.

How much does the 18-3373 kit weigh? The Sierra 18-3373 water pump kit weighs 1.55 pounds.

How many bolts come in the 18-3373 kit? Four bolts, Sierra part number 18-0256, are included in the 18-3373 water pump kit.

Is the Sierra 18-3373 a genuine OEM part or aftermarket? The 18-3373 is a Sierra aftermarket replacement kit engineered to meet or exceed the original Yamaha equipment part it replaces, OEM number 6E5-W0078-A1-00.

What is the difference between the 18-3373 and 18-3372 water pump kits? The 18-3373 includes the water pump housing, while the 18-3372 is the same kit sold without the housing.

Does the kit include the impeller? Yes, the Sierra 18-3373 kit includes impeller part 18-3071 along with the housing, gasket, and bolts.

What gasket is used with the 18-3373 water pump kit? The kit uses Sierra gasket part 18-0244, OEM equivalent 6E5-44315-A0-00.

Can the 18-3373 be used to rebuild an existing water pump instead of replacing the whole assembly? Yes, since the 18-3373 includes the housing plus the gasket, bolts, and impeller, it can be used for a full water pump rebuild in one kit.