Sierra Water Pump Kit with Housing for Yamaha 2-Stroke Outboards, 18-3522-1

The Sierra Water Pump Kit with Housing, part number 18-3522-1, is a complete cooling-system rebuild kit designed for Yamaha 2-stroke outboard motors. It supplies the housing along with the components needed to restore proper water flow to the powerhead, helping prevent overheating that can occur once an original pump housing wears, cracks, or corrodes. Because the kit includes the housing itself rather than just the wear parts, it is intended for situations where the original housing is damaged, warped, or no longer sealing correctly, giving a more complete and reliable repair than an impeller-only kit.

Sierra manufactures this kit to match the specifications of the outboard water pump systems it is built for, so the housing and included hardware are sized to install as a unit. This makes it a straightforward option for routine maintenance or for a full pump rebuild when servicing the lower unit. The kit ships as a single count unit and is cataloged under Sierra's marine engine parts line for Yamaha outboard applications.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3522-1
• Product Type: Water Pump Kit with Housing
• Weight: 0.82 pounds
• Vehicle Service Type: Boat
• Engine Application: Yamaha 2-Stroke Outboard
• Unit Count: 1
• UPC: 808282362133
• GTIN: 00808282362133
• Included Components: Water Pump Kit with Housing

Fitment

Designed for Yamaha 2-stroke outboard motors.

Frequently Asked Questions

What is included in the Sierra 18-3522-1 water pump kit? The kit includes the water pump housing along with the components needed for a complete pump rebuild, listed as a single included-components unit for part number 18-3522-1.

What engines does the 18-3522-1 water pump kit fit? This Sierra kit is built for Yamaha 2-stroke outboard motors.

Does this kit come with the housing or just the impeller? It comes with the housing included, not just the impeller, since 18-3522-1 is a water pump kit with housing rather than an impeller-only kit.

How much does the Sierra 18-3522-1 water pump kit weigh? It weighs 0.82 pounds.

How many units come in one package? The unit count for the Sierra 18-3522-1 kit is 1, meaning one complete water pump kit with housing per package.

Is this a genuine Sierra part or an aftermarket copy? It is a genuine Sierra-branded part, manufactured and sold under Sierra's own part number 18-3522-1.

Why replace the housing instead of just the impeller? When the original pump housing is cracked, warped, or no longer sealing properly, replacing it along with the wear components, as this kit does, restores reliable water flow better than swapping the impeller alone.

What is the UPC for this product? The UPC for the Sierra 18-3522-1 water pump kit is 808282362133.

Is this kit for a 2-stroke or 4-stroke Yamaha outboard? It is designed for Yamaha 2-stroke outboard motors.

What vehicle type is this part designed for? It is designed for boats, listed with a vehicle service type of Boat.