420931670 Power Valve O-Ring for Sea-Doo GTX RFI 800 1998-2002

Power Valve O-Ring for Sea-Doo

This power valve O-ring, referenced under 420931670, is a replacement sealing component that keeps the exhaust power valve assembly on Sea-Doo GTX RFI 800 engines sealing correctly.

Overview

The power valve O-ring for Sea-Doo is a sealing part used in the exhaust power valve system of the GTX RFI 800. This power valve O-ring for Sea-Doo helps hold a proper seal at the valve housing so exhaust pressure stays controlled through the rev range. It suits riders doing routine top-end maintenance or rebuilding a power valve assembly on 1998 to 2002 Sea-Doo GTX RFI models.

Built For Performance

• Direct replacement part number 420931670 for the original power valve seal
• Seals the power valve housing against exhaust pressure loss
• Resists heat and oil exposure typical of two-stroke exhaust environments
• Compact ring shape allows straightforward installation during valve service
• Suits rebuild and reseal work on the GTX RFI 800 power valve assembly

Fits These Machines

• for Sea-Doo GTX RFI 800
• for Sea-Doo GTX 1998
• for Sea-Doo GTX 1999
• for Sea-Doo GTX 2000
• for Sea-Doo GTX 2001
• for Sea-Doo GTX 2002

On-The-Job Use

• Power valve cleaning and reseal during top-end maintenance
• Exhaust valve service on GTX RFI 800 engines
• Rebuilding a power valve assembly after carbon buildup
• Seasonal tune-ups on older personal watercraft

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: This is a replacement power valve O-ring, not a factory original, and it is referenced under 420931670. Confirm your engine and valve assembly before ordering.

Q: How many O-rings do I need? A: Many power valve assemblies use one seal per valve, so check your service manual for the exact count. Order the quantity your specific engine setup requires.

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