420256606 Valve Seat Sleeve for Sea-Doo GTX STD 230 1503 2018-2019

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve is a replacement engine component that presses into the cylinder head to provide a durable seating surface for the valve, and it carries OEM cross-reference 420256606.

Overview

This valve seat sleeve is a precision engine component designed to restore proper valve seating in the cylinder head. The valve seat sleeve for Sea-Doo watercraft helps maintain compression and valve alignment for reliable performance. It suits riders and mechanics rebuilding or servicing 1503-series engines.

Built For Performance

• Precision-machined seating surface for consistent valve contact
• Durable construction to withstand high combustion temperatures
• Direct replacement for OEM part number 420256606
• Designed for 1503 engine cylinder heads
• Supports proper compression and valve sealing

Fits These Machines

• for Sea-Doo GTX STD 230 1503, 2018-2019

On-The-Job Use

• Cylinder head rebuilds and top-end servicing
• Valve seat replacement during engine repair
• Restoring compression on high-hour 1503 engines
• Marine shop and DIY rebuild projects

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: This is an aftermarket valve seat sleeve that cross-references OEM number 420256606. Confirm fitment against your model and serial number before ordering.

Q: Do I need to machine the head after installing this sleeve? A: Valve seat sleeves typically require proper installation and seat cutting to match valve angles. Have a qualified machinist handle installation for correct valve sealing.

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