420254882 Intake or Exhaust Valve Guide for Sea-Doo Sport 21-300 1630 2026

Intake or Exhaust Valve Guide for Sea-Doo Sport 21-300 1630

This intake or exhaust valve guide, OEM cross-reference 420254882, keeps valve stems moving straight and true in the Sea-Doo Sport 21-300 1630 engine.

Overview

This valve guide for Sea-Doo Sport 21-300 1630 is a precision-machined component that locates the intake or exhaust valve stem inside the cylinder head. It maintains correct stem alignment so the valve seats fully on every cycle and controls oil at the guide bore. Built for riders and engine builders servicing the 1630 platform.

Built For Performance

• Precision-machined bore for accurate valve stem alignment
• Direct cross-reference to OEM part number 420254882
• Withstands high combustion and exhaust temperatures
• Resists wear for consistent valve sealing over service life
• Suits intake or exhaust valve positions

Fits These Machines

• for Sea-Doo Sport 21-300 1630, 2026

On-The-Job Use

• Cylinder head rebuilds on 1630 engines
• Valve seal and seat service
• Top-end refresh after hours of operation
• Engine repair and performance builds

Specs At A Glance

Good To Know

Q: What does a valve guide do in my engine? A: It holds the valve stem in precise alignment so the valve opens and closes squarely against its seat. Worn guides let the valve rock, which can cause poor sealing, oil consumption, and compression loss.

Q: Does this part fit both intake and exhaust valves? A: Yes, this guide is used for intake or exhaust valve positions on the 1630 engine as listed. Always confirm the part number 420254882 matches your machine's parts diagram before ordering.

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