420256606 Valve Seat Sleeve for Sea-Doo Challenger SE 255 1503 2009-2011

Valve Seat Sleeve for Sea-Doo Challenger SE 255 1503

This valve seat sleeve is a replacement engine component for Sea-Doo Challenger SE 255 1503 models, cross-referenced to OEM part number 420256606, and it provides a durable seating surface for the valve inside the cylinder head.

Overview

This valve seat sleeve for Sea-Doo is a precision-fit engine part that presses into the cylinder head to give the valve a stable, wear-resistant seat. The valve seat sleeve, sold under OEM reference 420256606, helps restore proper valve sealing on 1503 engine platforms used in Challenger SE 255 applications. It suits riders and mechanics handling top-end rebuilds or refresh work on these watercraft.

Built For Performance

• Cross-referenced to OEM part number 420256606 for straightforward matching
• Machined to seat precisely in the 1503 cylinder head
• Hardened seating surface resists wear from repeated valve cycling
• Restores valve sealing for consistent compression
• Suited to top-end rebuild and refresh work

Fits These Machines

• for Sea-Doo Challenger SE 255 with 1503 engine, 2009-2011

On-The-Job Use

• Cylinder head rebuilds on 1503 engines
• Valve job and top-end refresh work
• Marine engine service and repair

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: No, this is a replacement valve seat sleeve for Sea-Doo applications, cross-referenced to OEM number 420256606. Confirm the part number against your machine before ordering.

Q: How many should I order for a rebuild? A: Order the quantity your cylinder head requires for the valves being serviced. Seats are typically replaced as part of a full valve job.

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