420950792 Throttle Body Gasket for Sea-Doo Sport 21-300 1630 2026

Throttle Body Gasket for Sea-Doo Sport 21-300

The throttle body gasket seals the throttle body to intake joint on the 1630 engine, preventing vacuum leaks and maintaining stable airflow; it cross-references OEM part number 420950792.

Overview

This throttle body gasket for Sea-Doo is a replacement sealing component for the 1630 engine found in Sport 21-300 models. It seals the throttle body mounting surface so air entering the intake is properly metered, which supports steady idle, clean throttle response, and correct fuel mixture. It suits owners and technicians servicing the 1630 platform who want a reliable replacement seal.

Built For Performance

• Shaped to match the throttle body mounting flange for a tight seal
• Handles repeated heat cycling within the intake and engine bay
• Resists fuel vapor and intake air exposure
• Seals the throttle body joint to help prevent vacuum leaks
• Direct replacement for OEM part number 420950792

Fits These Machines

• for Sea-Doo Sport 21-300 1630, 2026

On-The-Job Use

• Throttle body removal and reinstallation service
• Intake vacuum leak diagnosis and repair
• Intake and top-end maintenance on the 1630 engine
• Seasonal tune-ups and gasket refresh

Specs At A Glance

Good To Know

Q: How often should a throttle body gasket be replaced? A: Replace it whenever the throttle body is removed, and check it during intake service or if a vacuum leak is suspected. A worn gasket can cause idle and lean-condition issues.

Q: Does this gasket need sealant? A: No, a properly formed throttle body gasket seals on its own once the fasteners are torqued to specification. Sealant can interfere with correct seating.

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