420950840 Water Pump Housing Gasket for Sea-Doo RXT XRS 300 1630 2017-2022

Water Pump Housing Gasket for Sea-Doo

This water pump housing gasket for Sea-Doo replaces OEM part 420950840, sealing the pump housing to prevent coolant leaks on 1630 engine models.

Overview

This water pump housing gasket for Sea-Doo is a direct-fit sealing component for the 1630 engine used in RXT and XRS 300 models. It seals the mating surface between the water pump housing and engine block, keeping coolant flow contained under pressure. Built for riders and mechanics servicing 2017 through 2022 personal watercraft.

Built For Performance

• Precision-cut to match OEM 420950840 sealing dimensions
• Seals the water pump housing against coolant leaks under operating pressure
• Constructed from gasket material rated for marine cooling systems
• Direct replacement for worn or blown housing gaskets
• Resists coolant, heat, and vibration common to personal watercraft engines

Fits These Machines

• for Sea-Doo RXT 300 1630 (2017-2022)
• for Sea-Doo RXT-X 300 1630 (2017-2022)
• for Sea-Doo RXT-XRS 300 1630 (2017-2022)

On-The-Job Use

• Cooling system rebuilds on 1630 engine watercraft
• Water pump housing removal and resealing
• Routine maintenance to stop coolant seepage
• Post-overheat repairs where the housing gasket is replaced

Specs At A Glance

Good To Know

Q: Does this gasket fit both RXT and RXT-X 300 models? A: Yes, this gasket is listed for 1630 engine RXT and RXT-X 300 models from 2017 to 2022 and cross-references OEM 420950840.

Q: Should I replace this gasket every time the water pump housing is removed? A: Yes, gaskets are single-use sealing components and should be replaced whenever the housing is separated to prevent 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.