99999-04523-00 Jet Pump Housing 160mm for Yamaha GP 1800 2017-2018

Jet Pump Housing for Yamaha

This 160 mm jet pump housing serves as a direct replacement for OEM part 99999-04523-00, providing the durable foundation that channels water through your personal watercraft's propulsion system.

Overview

The 160 mm jet pump housing for Yamaha is a critical driveline component that houses the impeller and directs pressurized water out of the nozzle to generate thrust. Built as a direct fit replacement, this jet pump housing keeps your craft tracking straight and accelerating cleanly on the water. It is intended for riders who need a dependable housing to replace a cracked, worn, or corroded original unit.

Built For Performance

• 160 mm internal diameter matched to stock pump geometry
• Direct replacement for OEM part number 99999-04523-00
• Rugged cast construction that resists corrosion in fresh and salt water
• Precision-machined surfaces for a true impeller fit
• Designed to bolt up to the factory mounting points
• Maintains factory water flow characteristics for consistent thrust

Fits These Machines

• for Yamaha GP 1800, 2017-2018

On-The-Job Use

• Replacing a cracked or corroded pump housing after impact damage
• Restoring factory water flow on a high-hour pump overhaul
• Routine driveline service on a GP 1800 personal watercraft
• Fresh water and salt water riding where corrosion resistance matters

Specs At A Glance

Good To Know

Q: Do I need to replace the wear ring at the same time? A: It is good practice to inspect the wear ring, impeller, and bearings whenever the housing is off, since worn parts can affect pump efficiency.

Q: Does this housing come with the impeller installed? A: This listing covers the housing itself, so reuse or replace the impeller and bearings as needed during installation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.