420256606 Valve Seat Sleeve for Sea-Doo SP 1503 260 2012

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve (OEM 420256606) is a replacement component that presses into the cylinder head to give the valve a durable seating surface on Sea-Doo 1503 engines.

Overview

This valve seat sleeve is a precision-machined replacement for the 1503 engine used in Sea-Doo watercraft. It restores the valve seating surface inside the cylinder head, helping maintain proper compression and valve sealing. It is intended for riders and shops rebuilding or servicing a Sea-Doo 1503 valve train.

Built For Performance

• Machined to OEM reference 420256606 dimensions
• Provides a hardened seating surface for valve contact
• Designed for the 1503 four-stroke engine platform
• Restores valve seal to support consistent compression
• Suited to cylinder head rebuild and refresh work

Fits These Machines

• for Sea-Doo models equipped with the 1503 engine
• for Sea-Doo SP 155 1503 (2012)
• for Sea-Doo SP 260 1503 (2012)

On-The-Job Use

• Cylinder head service and valve train rebuilds
• Refreshing worn or damaged valve seats
• Shop-level engine repair on 1503 powerplants
• Restoring valve sealing after high-hour use

Specs At A Glance

Good To Know

Q: Does this sleeve fit both 155 and 260 versions of the 1503 engine? A: The listing covers 1503 applications including the 155 and 260 variants, but fit can depend on year and serial number, so confirm against your engine before ordering.

Q: Is installation a direct press-in job? A: Valve seat sleeves typically require cylinder head machining and proper press fitting, so professional installation is recommended for correct seating.

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