Sierra 18-3415 Water Pump Kit with Housing, Replaces 63D-W0078-01-00, Fits Yamaha 40-60 HP Outboards

The Sierra 18-3415 is a complete water pump kit with housing, built to restore proper cooling flow on a range of Yamaha outboard motors. This kit includes the pump housing along with the internal wear components that fail first in a marine water pump: the impeller and the pump case gasket. Replacing these parts together as a kit ensures a fresh sealing surface and a new impeller are installed at the same time as the housing, which is the recommended approach whenever a water pump housing shows wear, cracking, or corrosion.

Inside the kit, the 18-3069 impeller (OEM 697-44352-00-00) provides the pumping action that draws raw water through the cooling system, while the 18-0483 pump case gasket (OEM 63D-44316-00-00) seals the housing against the lower unit to prevent water loss and maintain pump pressure. The housing itself is constructed of aluminum and cast iron for durability in a marine environment.

The Sierra 18-3415 fits Yamaha 40/50 (1995-03), P40 (1998), C40 3 cyl (1997-02), C50 (1999-01), F40 2.6L (1999), F50 (1995-03), P50 (1995-96), and F60 (2002-03) outboards. Buyers who already have a serviceable housing and only need the internal wear parts can order the equivalent kit without housing, 18-3434.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3415
• Product Name: Water Pump Kit with Housing
• Material: Aluminum, Cast Iron
• Weight: 0.73 pounds
• UPC: 808282287047
• Included Components: Pump case gasket 18-0483 (OEM 63D-44316-00-00), Impeller 18-3069 (OEM 697-44352-00-00)
• OEM Cross Reference: 63D-W0078-01-00, 63D-44311-00-00
• Fitment: Yamaha 40/50 (1995-03), P40 (1998), C40 3 cyl (1997-02), C50 (1999-01), F40 2.6L (1999), F50 (1995-03), P50 (1995-96), F60 (2002-03)

Fitment

• Yamaha 40/50, 1995-03
• Yamaha P40, 1998
• Yamaha C40 3 cyl, 1997-02
• Yamaha C50, 1999-01
• Yamaha F40 2.6L, 1999
• Yamaha F50, 1995-03
• Yamaha P50, 1995-96
• Yamaha F60, 2002-03

Replaces (OEM)

• 63D-W0078-01-00
• 63D-44311-00-00

Frequently Asked Questions

What does the Sierra 18-3415 water pump kit include? The kit includes a pump housing along with the impeller (18-3069, OEM 697-44352-00-00) and the pump case gasket (18-0483, OEM 63D-44316-00-00), giving you a complete replacement rather than just the wear parts.

Which OEM part numbers does the 18-3415 replace? This kit cross-references to OEM numbers 63D-W0078-01-00 and 63D-44311-00-00.

What Yamaha outboards is the Sierra 18-3415 designed for? It fits Yamaha 40/50 (1995-03), P40 (1998), C40 3 cyl (1997-02), C50 (1999-01), F40 2.6L (1999), F50 (1995-03), P50 (1995-96), and F60 (2002-03) outboards.

Is the Sierra 18-3415 an aftermarket or genuine OEM part? The 18-3415 is a Sierra aftermarket kit engineered as a direct equivalent to OEM numbers 63D-W0078-01-00 and 63D-44311-00-00, not a Yamaha-branded part.

How much does the 18-3415 water pump kit weigh? The Sierra 18-3415 water pump kit weighs 0.73 pounds.

What material is the pump housing made of? The housing in the 18-3415 kit is constructed of aluminum and cast iron.

Is there a version of this kit without the housing? Yes, Sierra offers the same internal components without the housing under part number 18-3434 for buyers whose existing housing is still serviceable.

Does the 18-3415 kit come with a new impeller? Yes, the kit includes a new impeller, Sierra part 18-3069, which cross-references to OEM 697-44352-00-00.

Will the 18-3415 fit a Yamaha C40 outboard? Yes, the 18-3415 kit fits the Yamaha C40 3 cyl outboard for model years 1997-02.

What gasket is included with the 18-3415 kit? The kit includes Sierra pump case gasket 18-0483, which cross-references to OEM 63D-44316-00-00.

Does the 18-3415 fit the Yamaha F60 outboard? Yes, the Sierra 18-3415 fits the Yamaha F60 for model years 2002-03.

What is the UPC for the Sierra 18-3415 water pump kit? The UPC for the Sierra 18-3415 water pump kit with housing is 808282287047.