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

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve is a replacement engine component designed to restore proper valve sealing in Sea-Doo 1503 4-TEC engines, referencing OEM part number 420256606.

Overview

This valve seat sleeve for Sea-Doo is a precision-machined replacement component that presses into the cylinder head to provide a durable sealing surface for the engine valves. The valve seat sleeve for Sea-Doo helps restore compression and valve sealing on 1503 4-TEC engines that have worn or damaged seats. It is intended for riders and mechanics performing top-end service on 2008 Sea-Doo Speedster 310 models.

Built For Performance

• Machined to match OEM part number 420256606 dimensions
• Provides a hardened sealing surface for engine valves
• Restores valve sealing and compression on worn cylinder heads
• Compatible with Sea-Doo 1503 4-TEC engine architecture
• Suited to top-end rebuild and cylinder head service work

Fits These Machines

• for Sea-Doo Speedster 310 (2008)
• for Sea-Doo 1503 4-TEC engine applications

On-The-Job Use

• Cylinder head rebuilds on Sea-Doo 1503 4-TEC engines
• Restoring compression on high-hour jet boats
• Valve service and top-end repair work
• Replacing worn or pitted valve seat surfaces

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: This is an aftermarket valve seat sleeve made for Sea-Doo 1503 4-TEC engines and cross-references OEM number 420256606. It is not an original factory part.

Q: How many sleeves should I order? A: Order the quantity that matches the number of valve seats being serviced in your cylinder head. Confirm your engine serial number and model year before ordering.

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