420256606 Valve Seat Sleeve for Sea-Doo RXT X 1503 255 2008-2009

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 1503-powered watercraft; it corresponds to OEM reference 420256606.

Overview

This valve seat sleeve for Sea-Doo is the insert that renews worn valve seating surfaces in the cylinder head, helping maintain compression and valve seal on 1503 engines. It suits riders and shops rebuilding a top end that need a reliable replacement valve seat sleeve. Each unit matches the 420256606 reference for straightforward sourcing.

Built For Performance

• Precision-formed seating surface for proper valve face contact
• Stable press-fit design for secure cylinder head installation
• Withstands repeated combustion heat cycling
• Direct replacement for OEM reference 420256606
• Suited to 1503 four-stroke marine engine rebuilds

Fits These Machines

• for Sea-Doo RXT X 255 1503, 2008-2009
• for Sea-Doo RXT X 260 1503, 2010-2015

On-The-Job Use

• Cylinder head rebuilding and valve service
• Top end refreshes on 1503 four-stroke engines
• Marine engine repair shops and DIY garage projects
• Compression restoration on high-hour watercraft

Specs At A Glance

Good To Know

Q: How many valve seat sleeves are included? A: This listing covers a single valve seat sleeve, so check your cylinder head requirements and order the quantity you need.

Q: Does installing a valve seat sleeve require machining? A: Seat sleeve work is typically a cylinder head machine shop job, since the bore has to be cut and the sleeve pressed and finished to the correct valve seat profile.

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