420254882 Intake or Exhaust Valve Guide for Sea-Doo RXT P XRS 300 1630 2018

Intake or Exhaust Valve Guide for Sea-Doo

This intake or exhaust valve guide is a replacement engine component for Sea-Doo watercraft, referenced under OEM part number 420254882, built to keep valve stems aligned through every combustion cycle.

Overview

This valve guide is a direct-fit replacement for the 1630 ACE engine used in Sea-Doo RXT, RXT P, and XRS 300 models. It holds the valve in true alignment so the valve seats cleanly and compression stays where it should. It is aimed at riders and shops servicing a 2018 300-horsepower machine.

Built For Performance

• Precision bore for accurate valve stem alignment
• Heat-stable material that maintains clearance under load
• Wear-resistant surface for long service intervals
• Serves both intake and exhaust valve positions
• Rebuild-ready replacement for an OEM-referenced part

Fits These Machines

• for Sea-Doo RXT 300 (2018)
• for Sea-Doo RXT P 300 (2018)
• for Sea-Doo RXT XRS 300 (2018)
• for Sea-Doo 1630 ACE engine applications

On-The-Job Use

• Top-end rebuilds on the 1630 ACE 300 engine
• Valve jobs after a dropped or burned valve
• Refreshing the cylinder head during offseason service
• Correcting oil consumption from a worn guide

Specs At A Glance

Good To Know

Q: Will this work on both the intake and exhaust valves? A: Yes, this guide is listed for either position on the 1630 ACE head. Confirm which valve you are servicing before ordering.

Q: Does installation need a machine shop? A: Guides are normally pressed in and reamed to final clearance, so machining is advised. Check the specified bore for your head beforehand.

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