420854560 Power Valve Exhaust Valve for Sea-Doo GTX DI 951 2000-2003

Power Valve Exhaust Valve for Sea-Doo XP DI 951

This power valve exhaust valve is a direct-fit replacement for the 951 DI engine, cross-referencing OEM part 420854560, designed to restore variable exhaust timing in the Sea-Doo XP DI 951.

Overview

This power valve exhaust valve for Sea-Doo is built to replace a worn or sticking valve in the 951 DI engine, helping the exhaust port open and close at the correct RPM for strong low-end response and clean top-end pull. It suits riders performing routine top-end maintenance on the XP DI 951 who need a reliable power valve exhaust valve without chasing discontinued OEM stock. Sold as a single unit, it installs in the factory location using the original hardware and bellows arrangement.

Built For Performance

• Direct replacement for OEM part number 420854560
• Fits the 951 DI engine platform used in the XP DI
• Guillotine-style valve blade sized to the factory exhaust port
• Machined from corrosion-resistant material for marine exhaust exposure
• Restores variable exhaust timing for improved low-RPM torque
• Installs with factory springs, bellows, and housing

Fits These Machines

• for Sea-Doo XP DI 951
• for Sea-Doo 2003 XP DI
• for Sea-Doo 2004 XP DI

On-The-Job Use

• Top-end rebuilds on 951 DI two-stroke engines
• Replacing a carbon-stuck or scored exhaust valve
• Restoring power band after exhaust port fouling
• Pre-season service on high-hour personal watercraft
• Shop repairs where OEM part 420854560 is specified

Specs At A Glance

Good To Know

Q: Does this valve fit both cylinders of the 951 DI? A: It replaces the power valve exhaust valve specified by part number 420854560, so order the quantity your engine requires. Confirm your model year and engine code before purchase.

Q: Can I install this without removing the engine? A: On most XP DI hulls the valve housing is accessible with the seat and exhaust covers removed. Follow factory torque and clearance specs during reassembly.

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