420256606 Valve Seat Sleeve for Sea-Doo Speedster Wake 310 1503 2008

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve, part number 420256606, is a replacement engine component that seats within the cylinder head to guide and seal the valve in 1503 engine applications.

Overview

This valve seat sleeve for Sea-Doo is a precision-machined engine part that fits into the cylinder head to support proper valve seating and sealing. The 420256606 valve seat sleeve is intended for top-end service on 1503 engines. It suits riders and mechanics rebuilding or refreshing Sea-Doo watercraft engines.

Built For Performance

• Direct replacement for OEM part number 420256606
• Hardened material resists valve wear and heat
• Machined to tight tolerances for a secure valve fit
• Built for the 1503 engine platform
• Supports proper compression and valve sealing

Fits These Machines

• for Sea-Doo Speedster Wake 310 with 1503 engine (2008)
• for Sea-Doo models equipped with the 1503 engine

On-The-Job Use

• Cylinder head rebuilds and top-end engine service
• Valve seating and compression restoration
• Routine engine maintenance on 1503-equipped watercraft

Specs At A Glance

Good To Know

Q: What does a valve seat sleeve do? A: It presses into the cylinder head to provide a durable surface where the valve seats, helping maintain compression and a proper seal. A worn sleeve can lead to compression loss and rough running.

Q: Do I need to replace all sleeves at once? A: It is generally recommended to inspect all valve seat sleeves during a top-end rebuild and replace any that show wear or damage. Consult a service manual for the correct procedure on the 1503 engine.

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