420256606 Valve Seat Sleeve for Sea-Doo Challenger SP 430 1503 2010-2011

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve is a replacement engine component that restores a proper sealing surface for the valve in Sea-Doo 1503 four-stroke engines, and it is referenced under part number 420256606.

Overview

This valve seat sleeve for Sea-Doo is a precision-fit cylinder head component designed to seat the valve and maintain compression in 1503 engine applications. The valve seat sleeve for Sea-Doo helps restore valve sealing during a top-end rebuild, making it a practical choice for riders and mechanics servicing Challenger SP 430 models. It installs in the cylinder head location and is intended for those comfortable with engine teardown and machine work.

Built For Performance

• Fits 1503 four-stroke engine cylinder heads
• Restores the valve sealing surface for proper compression
• Referenced under part number 420256606
• Suited to top-end rebuild and valve service work
• Constructed for heat and wear exposure inside the combustion chamber

Fits These Machines

• for Sea-Doo Challenger SP 430
• for Sea-Doo 1503 engine applications

On-The-Job Use

• Valve service during cylinder head reconditioning
• Top-end rebuilds on 1503 marine engines
• Restoring compression on higher-hour Sea-Doo powerplants

Specs At A Glance

Good To Know

Q: Does this include the valve itself? A: No, this listing covers the valve seat sleeve only, so valves and other head components should be sourced separately if needed.

Q: Can I install this without machining the head? A: Valve seat sleeves typically require precision fitting by a machine shop, so professional installation is recommended for proper sealing.

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