420854449 Power Valve Piston for Sea-Doo Sportster LE 951 2000-2003

Power Valve Piston for Sea-Doo Sportster LE 951

This power valve piston is a replacement component for the exhaust power valve assembly on 2000-2003 Sea-Doo Sportster LE 951 boats, cross-referencing OEM part number 420854449.

Overview

This power valve piston is a direct replacement for the exhaust power valve in Sea-Doo Sportster LE 951 models from 2000 through 2003. The power valve piston controls exhaust port timing as engine speed changes, helping the 951 engine deliver consistent power. It is intended for owners performing top-end service on their Sea-Doo Sportster LE 951 or replacing a worn power valve piston.

Built For Performance

• Manufactured to OEM dimensions for a direct fit into the power valve housing
• Compatible with the 951 Rotax engine exhaust valve system
• Cross-references part number 420854449 for easy verification
• Machined surface finish for smooth travel inside the valve bore
• Withstands the heat and carbon deposits typical of two-stroke exhaust valves

Fits These Machines

• for Sea-Doo Sportster LE 951 2000
• for Sea-Doo Sportster LE 951 2001
• for Sea-Doo Sportster LE 951 2002
• for Sea-Doo Sportster LE 951 2003

On-The-Job Use

• Servicing exhaust power valves during routine top-end rebuilds
• Restoring correct exhaust port timing on high-hour 951 engines
• Replacing a stuck or carbon-fouled power valve piston
• Maintenance on jet boats operated in fresh or salt water

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: This is an aftermarket replacement power valve piston that cross-references OEM part number 420854449, not an original Sea-Doo branded component.

Q: How many pistons should I order? A: The 951 Rotax engine uses one power valve piston per cylinder, so confirm how many cylinders you are servicing before ordering.

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