420256606 Valve Seat Sleeve for Sea-Doo GTX 1503 2002-2003

Valve Seat Sleeve for Sea-Doo GTX 1503

This valve seat sleeve for Sea-Doo is a replacement engine component that provides a fresh sealing surface for the valve in 1503 powerplants, referenced under OEM part number 420256606.

Overview

This valve seat sleeve for Sea-Doo is a precision engine part that presses into the cylinder head so the valve seats correctly and seals under combustion pressure. The valve seat sleeve for Sea-Doo helps maintain compression and reliable valve operation in a rebuilt top end. It is aimed at riders and technicians servicing a 1503 engine who want a direct-fit alternative to OEM 420256606.

Built For Performance

• Cross-references OEM part number 420256606
• Precision-formed to restore proper valve seating in the 1503 cylinder head
• Built for the Sea-Doo GTX 1503 platform
• Supports consistent valve seal and compression
• Intended for rebuild and top-end service work

Fits These Machines

• for Sea-Doo GTX 1503, 2002-2003

On-The-Job Use

• Cylinder head rebuilds on 1503 engines
• Top-end refresh after valve wear
• Shop service and seasonal maintenance
• Restoring a personal watercraft to running condition

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: This is an aftermarket valve seat sleeve that cross-references OEM number 420256606, not an original brand product. Verify your engine and part number before ordering.

Q: Will it fit my model year exactly? A: Fitment can depend on the specific engine build and serial number, so confirm your application before purchase. Check your service manual for the correct part number.

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