420260721 Power Valve Water Box Bellow for Sea-Doo GSX 800 1996-1997

Power Valve Water Box Bellow for Sea-Doo

This power valve water box bellow is a direct replacement component for the exhaust power valve system, cross-referencing OEM part number 420260721.

Overview

The power valve water box bellow for Sea-Doo 800 engines seals the exhaust valve linkage as it passes through the water box, keeping water and exhaust gases where they belong. This bellow for Sea-Doo personal watercraft helps maintain correct power valve actuation, which supports clean running and consistent power delivery. It suits riders and mechanics servicing 1996 to 1997 Sea-Doo GSX 800 and Challenger 800 watercraft.

Built For Performance

• Rubber construction matched to OEM part number 420260721 dimensions
• Flexible wall design absorbs valve rod movement without cracking
• Seals the water box opening to keep exhaust gases contained
• Direct replacement for the original bellow on 800 series engines
• Resists heat, water, and fuel vapor exposure in the exhaust area

Fits These Machines

• for Sea-Doo GSX 800 (1996-1997)
• for Sea-Doo Challenger 800 (1996-1997)

On-The-Job Use

• Exhaust power valve service on Sea-Doo 800 engines
• Water box and exhaust system rebuilds
• Waterside troubleshooting of power valve leaks
• Routine maintenance for 1996-1997 Sea-Doo watercraft

Specs At A Glance

Good To Know

Q: How do I know if my bellow needs replacing? A: Look for cracks, hardening, or water and exhaust leaking around the water box opening, which can also cause rough power valve operation.

Q: Is this an original Sea-Doo part? A: This is an aftermarket replacement bellow made to work with OEM part number 420260721, not an original factory part.

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