420256606 Valve Seat Sleeve for Sea-Doo GTX S/C 1503 2003-2006

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve is a replacement engine component that presses into the cylinder head to provide a durable seating surface for the valve, restoring proper valve sealing on Sea-Doo 1503 engines.

Overview

This valve seat sleeve is a precision replacement part for the Sea-Doo 1503 engine family. It renews the valve seating surface inside the cylinder head, helping maintain compression and combustion efficiency. It suits riders and shops rebuilding or refreshing a Sea-Doo 1503 powerplant.

Built For Performance

• Direct replacement for OEM part number 420256606
• Machined to seat securely in the cylinder head bore
• Provides a renewed valve sealing surface
• Compatible with the Sea-Doo 1503 engine platform
• Intended for cylinder head rebuild and repair work

Fits These Machines

• for Sea-Doo GTX S/C 1503, 2003-2006
• for Sea-Doo 1503 engine applications

On-The-Job Use

• Cylinder head rebuilds on Sea-Doo 1503 engines
• Valve service and top-end repair work
• Restoring valve sealing on high-hour engines

Specs At A Glance

Good To Know

Q: Does this sleeve need machining after installation? A: Valve seat sleeves typically require cutting or lapping after pressing in to match the valve face angle. Professional installation is recommended for proper sealing.

Q: Is this an original Sea-Doo part? A: This is an aftermarket replacement valve seat sleeve cross-referenced to OEM part number 420256606 for the Sea-Doo 1503 engine.

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