420256606 Valve Seat Sleeve for Sea-Doo Fish Compact 170 1630 2026

Valve Seat Sleeve for Sea-Doo

The Valve Seat Sleeve, part number 420256606, is a precision engine component that fits into the cylinder head to hold the valve seat and maintain proper valve alignment on Sea-Doo personal watercraft.

Overview

This Valve Seat Sleeve is a replacement engine component designed for Sea-Doo watercraft, specifically the Fish Compact 170 1630 platform. The valve seat sleeve supports the valve seat and helps maintain proper valve sealing and alignment within the cylinder head. It is intended for riders and mechanics performing top-end engine service on compatible Sea-Doo models.

Built For Performance

• Direct replacement for OEM part number 420256606
• Precision-machined for proper valve seat fitment
• Constructed from durable materials for engine heat resistance
• Helps maintain correct valve alignment and sealing
• Designed for 1630 engine platform applications

Fits These Machines

• for Sea-Doo Fish Compact 170 1630 (2026)

On-The-Job Use

• Top-end engine rebuilds
• Cylinder head service and repair
• Valve seat replacement procedures
• Routine engine maintenance on compatible models

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: No, this is an aftermarket replacement valve seat sleeve designed to match OEM specifications for part number 420256606.

Q: How many sleeves should I order? A: Order the quantity required for your specific cylinder head service, as each valve position may need its own sleeve.

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