420256606 Valve Seat Sleeve for Sea-Doo GTR X HO 1503 2019

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve, part number 420256606, is a precision component that presses into the cylinder head to provide a durable sealing surface for the valve, helping maintain proper compression on your engine.

Overview

This valve seat sleeve is a replacement engine component designed to restore the valve sealing surface inside the cylinder head of your watercraft. The valve seat sleeve for Sea-Doo helps maintain correct valve seating and compression so the engine runs as intended. It suits riders and mechanics performing top-end service on the 1503 engine platform.

Built For Performance

• Precision-machined seating surface for consistent valve contact
• Restores worn or damaged valve seat geometry in the cylinder head
• Constructed to withstand high combustion temperatures
• Direct replacement for OEM part number 420256606
• Sold as a single sleeve for individual valve positions

Fits These Machines

• for Sea-Doo GTR X HO 1503 (2019)

On-The-Job Use

• Top-end engine rebuilds on 1503-powered watercraft
• Cylinder head refurbishment when valve seats are worn
• Restoring compression after engine overheating damage
• Routine service by marine mechanics and DIY riders

Specs At A Glance

Good To Know

Q: Does this include the valve itself? A: No, this listing is for the valve seat sleeve only, and valves must be sourced separately. Q: Should a machine shop install this? A: Valve seat sleeves typically require pressing and machining to achieve the correct seat angle, so professional installation is recommended.

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