420256606 Valve Seat Sleeve for Sea-Doo Challenger Wake S/C 215 1503 2007

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve, part number 420256606, is a replacement engine component that holds and aligns the valve seat in Sea-Doo 1503 engines used in Challenger and Wake models.

Overview

This valve seat sleeve is a precision engine component made for Sea-Doo jet boats and watercraft. The sleeve presses into the cylinder head to seat and align the valve, helping maintain compression and combustion on the 1503 engine. It suits owners and mechanics doing top-end rebuilds on Sea-Doo Challenger and Wake models.

Built For Performance

• Replacement valve seat sleeve matching the 420256606 reference
• Supports proper valve seating and alignment in the head
• Designed for the 1503 engine family
• Suited to top-end rebuild and head service
• Sold as a single sleeve for targeted replacement

Fits These Machines

• for Sea-Doo Challenger models with the 1503 engine
• for Sea-Doo Wake models with the 1503 engine

On-The-Job Use

• Cylinder head rebuilds and valve service
• Compression restoration on high-hour 1503 engines
• Shop and DIY top-end work on Sea-Doo jet boats

Specs At A Glance

Good To Know

Q: Does this sleeve fit both the supercharged and non-supercharged 1503? A: The 1503 family shares this seat sleeve reference, but confirm your specific head casting before ordering.

Q: Is this an original Sea-Doo part? A: This is an aftermarket replacement valve seat sleeve made to fit Sea-Doo applications.

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