420256606 Valve Seat Sleeve for Sea-Doo GTX LTD 230 1503 2017-2019

Valve Seat Sleeve for Sea-Doo GTX LTD 230 1503

This valve seat sleeve, reference 420256606, is a replacement engine component that restores proper valve sealing in the 1503 engine used by the Sea-Doo GTX LTD 230.

Overview

This valve seat sleeve is a precision engine component designed for the Sea-Doo GTX LTD 230 1503, referencing part number 420256606. Installed in the cylinder head, the valve seat sleeve gives the valve a hardened surface to seal against, helping maintain compression and combustion efficiency. It suits riders and mechanics rebuilding or refreshing the top end of a 1503 engine.

Built For Performance

• Precision-machined seat surface for consistent valve sealing
• Hardened construction to resist wear from repeated valve cycling
• Direct replacement for part number 420256606
• Designed around the 1503 engine platform geometry
• Supports stable compression and combustion performance

Fits These Machines

• for Sea-Doo GTX LTD 230 1503 (2017-2019)

On-The-Job Use

• Cylinder head rebuilds on the 1503 engine
• Top-end refresh after valve wear or overheating
• Valve service and compression restoration work
• Shop and DIY engine repair projects

Specs At A Glance

Good To Know

Q: How many valve seat sleeves should I order? A: Count the valves you are servicing in the cylinder head and order one sleeve per valve position that needs replacement. Inspecting all seats at once helps avoid repeat teardown later.

Q: Does this sleeve need machining after installation? A: Valve seat sleeves typically require cutting or lapping to match the valve angle and achieve a proper seal. Have the head serviced by a qualified machinist for best results.

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