420950840 Water Pump Housing Gasket for Sea-Doo Cruise 21-300 1630 2026

Water Pump Housing Gasket for Sea-Doo

This water pump housing gasket for Sea-Doo seals the pump housing on 1630-powered models, cross-referenced to OEM part 420950840.

Overview

This water pump housing gasket for Sea-Doo provides a reliable seal between the water pump housing and the engine case on 1630-equipped watercraft. It prevents coolant leaks and helps the cooling system hold pressure during operation. Suited to owners and technicians servicing Cruise 21-300 water pump assemblies.

Built For Performance

• Precision-cut to match the housing mating surface
• Coolant-resistant material handles constant thermal cycling
• Compressible construction seals minor surface imperfections
• Cross-referenced to OEM part 420950840 for easy lookup
• Direct replacement for the original housing gasket
• Sold as a single gasket for one pump housing

On-The-Job Use

• Water pump housing reseal during cooling system service
• Impeller or wear ring replacement jobs
• Leak repair at the pump housing mating surface
• Routine maintenance on 1630-powered watercraft

Specs At A Glance

Good To Know

Q: Does this gasket need sealant during install? A: Most installs rely on a clean, dry mating surface, though a thin film of suitable gasket sealant can be used if the surface is slightly uneven. Follow your service manual for the specific procedure.

Q: Can I reuse this gasket after removing the housing? A: No, gaskets are single-use and should be replaced each time the housing is removed. Reusing a compressed gasket can lead to coolant leaks.

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