420256606 Valve Seat Sleeve for Sea-Doo GTX S 155 1503 2012-2013 2015

Valve Seat Sleeve for Sea-Doo GTX S 155

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 for the Sea-Doo GTX S 155 1503.

Overview

The valve seat sleeve for Sea-Doo GTX S 155 is a machined insert that restores the valve seating area inside the cylinder head of the 1503 engine. It supports proper valve seal and compression on the Sea-Doo GTX S 155, making it a practical choice for top-end rebuilds. This valve seat sleeve suits riders and mechanics servicing 2012, 2013, and 2015 Sea-Doo GTX S 155 machines.

Built For Performance

• Machined to match the 1503 engine valve seat dimensions
• Provides a hard, wear-resistant seating surface for the valve
• Helps maintain compression and combustion sealing
• Direct replacement for reference 420256606
• Suited to cylinder head service and top-end rebuilds

Fits These Machines

• for Sea-Doo GTX S 155 1503, 2012
• for Sea-Doo GTX S 155 1503, 2013
• for Sea-Doo GTX S 155 1503, 2015

On-The-Job Use

• Cylinder head refurbishment on the 1503 engine
• Top-end rebuilds after valve damage or wear
• Valve job and seat replacement work
• Marine engine service and repair

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: No, this is an aftermarket valve seat sleeve made to fit the listed Sea-Doo GTX S 155 application, not an original brand item.

Q: How many sleeves come with one order? A: Each order includes the quantity shown at checkout; confirm the count against the number of seats your cylinder head service requires.

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