420256606 Valve Seat Sleeve for Sea-Doo Speedster 155 1503 2007-2011

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve for Sea-Doo, part number 420256606, is a precision replacement component that restores proper valve seating in the 1503 engine.

Overview

The valve seat sleeve for Sea-Doo is a machined insert that presses into the cylinder head to provide a durable sealing surface for the valve. This valve seat sleeve for Sea-Doo helps maintain compression and valve timing in the 1503 engine. It is intended for owners and technicians repairing or rebuilding 1503 series cylinder heads.

Built For Performance

• Machined to match the 1503 cylinder head valve seat bore
• Part number 420256606 for accurate identification
• Restores the valve sealing surface for reliable compression
• Compatible with the 1503 engine platform
• Suited for head rebuild and valve service work

Fits These Machines

• for Sea-Doo Speedster 155 with the 1503 engine, 2007-2011

On-The-Job Use

• Cylinder head rebuilds on the 1503 engine
• Valve seat replacement during top-end service
• Restoring compression on worn or damaged heads
• Marine engine repair workshops

Specs At A Glance

Good To Know

Q: Is this valve seat sleeve a genuine Sea-Doo part? A: This is an aftermarket valve seat sleeve for Sea-Doo, identified by part number 420256606, and is not an original brand product. Confirm your engine and head casting before ordering.

Q: Does installation require machining? A: Valve seat sleeves are typically pressed and finished by a machine shop to match valve seat angles. Professional installation is recommended for correct fit and sealing.

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