Power Valve Bellow Spring Large for Sea-Doo Challenger 1800 800 1999

Power Valve Exhaust Valve for Sea-Doo

The Power Valve Exhaust Valve for Sea-Doo is a replacement exhaust power valve assembly, reference 420854560, that regulates exhaust port timing to sharpen low-end and mid-range power delivery.

Overview

This power valve exhaust valve for Sea-Doo is a direct-fit replacement for the 951 DI engine's exhaust power valve, controlling the opening of the exhaust port to balance torque and top-end response. Manufactured as a replacement for the original 420854560, this power valve exhaust valve restores crisp throttle response on 951 DI-equipped watercraft. It suits riders and mechanics servicing 2000-2003 Sea-Doo GTX DI models seeking a dependable power valve exhaust valve for routine rebuilds.

Built For Performance

• Direct replacement for OEM reference 420854560
• Machined valve body designed for consistent port timing
• Compatible with 951 DI two-stroke engines
• Restores exhaust valve actuation for improved throttle response
• Constructed to withstand high-temperature exhaust exposure
• Sold as a single exhaust power valve

Fits These Machines

• for Sea-Doo GTX DI 951 (2000-2003)

On-The-Job Use

• Replacing a worn or seized power valve during top-end service
• Exhaust valve maintenance on 951 DI engines
• Restoring power delivery on GTX DI watercraft
• Shop and DIY rebuilds of the power valve assembly

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: This is a replacement power valve exhaust valve made for Sea-Doo 951 DI applications and is not an original brand product.

Q: Should I replace more than one power valve at a time? A: If multiple power valves show wear or carbon buildup, replacing them together helps maintain balanced exhaust timing across cylinders.

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