420256606 Valve Seat Sleeve for Sea-Doo Sportster S/C 215 1503 2005-2006

Valve Seat Sleeve for Sea-Doo Sportster S/C 215 1503

This valve seat sleeve, reference 420256606, is a replacement cylinder head component for the Sea-Doo 1503 engine, providing a durable seating surface that guides the valve and helps maintain proper compression and sealing.

Overview

This valve seat sleeve is a precision-fit component for the Sea-Doo 1503 engine, cross-referenced to 420256606. It installs into the cylinder head to give the valve a stable, wear-resistant seat, helping restore reliable sealing and combustion. It is intended for rebuilders and riders servicing the Sportster S/C 215 1503 from 2005 to 2006.

Built For Performance

• Cross-references OEM part number 420256606 for straightforward matching
• Machined seating surface supports consistent valve sealing
• Designed for the Sea-Doo 1503 four-stroke engine platform
• Suited to cylinder head rebuild and refresh work
• Construction stands up to the heat and load of marine engine operation

Fits These Machines

• for Sea-Doo Sportster S/C 215 1503, 2005-2006

On-The-Job Use

• Cylinder head service and valve seat replacement
• Engine rebuilds on the 1503 powerplant
• Restoring proper valve sealing and compression
• Marine shop and DIY maintenance work

Specs At A Glance

Good To Know

Q: What does a valve seat sleeve do? A: It provides a hardened seating surface in the cylinder head so the valve closes tightly, which supports compression and combustion. Worn seats can be replaced to restore sealing.

Q: Do I need engine work experience to install this? A: Installing a valve seat sleeve requires cylinder head removal and machining equipment, so it is best handled by a qualified engine machinist or shop.

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