420256606 Valve Seat Sleeve for Sea-Doo GTXS STD 155 1503 2017

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve is a replacement engine component designed to restore proper valve sealing in the 1503 engine platform, installed in applications requiring the 420256606 part number.

Overview

This valve seat sleeve for Sea-Doo is a precision-fit replacement component for the 1503 four-stroke engine found in GTXS STD 155 watercraft. The valve seat sleeve 420256606 provides a durable seating surface for the valve to seal against, helping maintain compression and combustion efficiency. It is intended for owners and mechanics performing top-end service on personal watercraft.

Built For Performance

• Direct replacement for OEM part number 420256606
• Constructed from hardened material to withstand combustion temperatures
• Precision machined for correct valve seating and alignment
• Designed for the 1503 engine platform
• Restores valve seal integrity during top-end rebuilds

Fits These Machines

• for Sea-Doo GTXS STD 155

On-The-Job Use

• Cylinder head service and valve work
• Top-end engine rebuilds
• Restoring compression on 1503 engines
• Routine maintenance on 2017 model watercraft

Specs At A Glance

Good To Know

Q: Is this valve seat sleeve a genuine Sea-Doo part? A: This is a replacement valve seat sleeve sold for Sea-Doo applications and is not an original manufacturer product. Always verify the part number 420256606 matches your engine before ordering.

Q: How many sleeves will I need? A: The 1503 engine uses multiple valves, so order the quantity required for your specific cylinder head service. Confirm your engine configuration before purchase.

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