420854358 Power Valve for Sea-Doo XP 800 1996-1997

Power Valve for Sea-Doo

This power valve (OEM cross-reference 420854358) is a replacement exhaust valve component that regulates exhaust port timing on 2-stroke marine engines.

Overview

This power valve is a replacement exhaust valve component designed for Sea-Doo XP 800 watercraft. The power valve regulates exhaust port timing, helping the engine deliver stronger low-end response and top-end power. It is intended for riders and mechanics sourcing a direct-fit replacement for a worn or fouled valve.

Built For Performance

• OEM cross-reference 420854358 for direct fitment matching
• Regulates exhaust port timing for improved power delivery across the RPM range
• Constructed for 2-stroke marine engine exhaust environments
• Replaces a worn or carbon-fouled valve that causes power loss
• Sold as a single valve unit

Fits These Machines

• for Sea-Doo XP 800 (1996-1997)

On-The-Job Use

• Restoring exhaust valve function on 2-stroke personal watercraft
• Routine engine maintenance and top-end rebuilds
• Replacing a seized or carbon-fouled power valve

Specs At A Glance

Good To Know

Q: How do I know if my power valve needs replacing? A: Common signs include loss of top-end power, rough idle, or excessive carbon buildup on the valve. Inspect the valve for sticking or damage during routine engine service.

Q: Does this valve require any adjustment after installation? A: Power valves should be checked for correct travel and clearance per your service manual after installation. Verify the linkage moves freely before running the engine.

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