420950840 Water Pump Housing Gasket for Sea-Doo RXT P XRS 300 1630 2018

Water Pump Housing Gasket for Sea-Doo

This water pump housing gasket for Sea-Doo seals the housing to the engine block on 1630cc powered models, and it is a direct replacement for OEM reference 420950840.

Overview

This water pump housing gasket for Sea-Doo is a sealing component that sits between the pump housing and the engine case to prevent coolant leaks. It is built for riders and mechanics servicing 2018 RXT P, XRS, and 300 models with the 1630 engine. Replacing a worn water pump housing gasket during pump service keeps the cooling system sealed and the engine running at the right temperature.

Built For Performance

• Direct replacement for OEM reference 420950840
• Precision cut to match the housing mounting surface
• Seals coolant passages under pressure and heat
• Resists swelling and breakdown from coolant exposure
• Fits 1630cc Sea-Doo engine applications
• Simple install during water pump service

Fits These Machines

• for Sea-Doo RXT P 300 1630, 2018
• for Sea-Doo RXT XRS 300 1630, 2018

On-The-Job Use

• Water pump housing resealing
• Cooling system maintenance
• Impeller and wear ring service
• Post-overheat repair work

Specs At A Glance

Good To Know

Q: Does this gasket need sealant during installation? A: Most water pump housing gaskets install dry on a clean, flat surface, though some mechanics add a thin bead of gasket sealer at the housing edge for extra security.

Q: How often should a water pump housing gasket be replaced? A: Replace it any time the housing is removed, and inspect it for weeping or hardening if you notice coolant loss around the pump area.

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