420256606 Valve Seat Sleeve for Sea-Doo LTD 18-300 1630 2026

Valve Seat Sleeve for Sea-Doo

This valve seat sleeve, referenced under OEM part number 420256606, is a replacement engine component that seats and supports the valve guide in select Sea-Doo watercraft engines.

Overview

The valve seat sleeve referenced as 420256606 is a precision engine component designed to hold valve seats securely within the cylinder head of select Sea-Doo watercraft. This valve seat sleeve helps maintain proper valve alignment and sealing so the engine can deliver consistent compression and performance. It is intended for riders and mechanics performing top-end service on compatible Sea-Doo models.

Built For Performance

• OEM cross-reference part number 420256606 for straightforward identification
• Machined to locate and support the valve seat within the cylinder head
• Helps maintain correct valve alignment for reliable sealing
• Contributes to consistent compression across the combustion chamber
• Constructed for the demands of marine engine operating conditions

Fits These Machines

• for Sea-Doo LTD 18-300 1630 (2026)

On-The-Job Use

• Cylinder head service and top-end rebuilds
• Valve seat replacement during engine refresh
• Maintenance on compatible Sea-Doo 1630 engines

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: This is a replacement valve seat sleeve with an OEM cross-reference number of 420256606. Confirm your model and serial number before ordering.

Q: How many sleeves should I order? A: Order the quantity required by your specific cylinder head service. Check your engine configuration to determine the correct count.

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