420256606 Valve Seat Sleeve for Sea-Doo Utopia SE 155 1503 2007-2009

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve, reference 420256606, is a replacement engine component that presses into the cylinder head to give the valve a durable seating surface.

Overview

The valve seat sleeve for Sea-Doo is a precision-fit engine part that restores the sealing surface where the valve closes against the head. This valve seat sleeve for Sea-Doo supports proper compression and combustion on the 1503 engine. It suits rebuilders and owners refreshing a worn or damaged valve seat sleeve for Sea-Doo watercraft.

Built For Performance

• Reference 420256606 for straightforward parts lookup
• Machined to seat valves squarely in the cylinder head
• Restores the sealing surface for consistent compression
• Suited to 1503 engine rebuild and refresh work
• Installs in place of the original valve seat sleeve

Fits These Machines

• for Sea-Doo Utopia 155
• for Sea-Doo Utopia SE 155

On-The-Job Use

• Cylinder head service on 1503 engines
• Top-end rebuilds and valve work
• Restoring compression on high-hour watercraft
• Shop and DIY engine repair

Specs At A Glance

Good To Know

Q: What does a valve seat sleeve do? A: It provides the hardened surface the valve closes against in the cylinder head, helping maintain a proper seal and compression. Replacement is typically needed when the original seat is worn or damaged.

Q: Should I replace more than one at a time? A: If several seats show similar wear, addressing them together during a head service is common practice. Always confirm the exact quantity and position needed for your engine.

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