420950840 Water Pump Housing Gasket for Sea-Doo RXP P X 300 1630 2018

Water Pump Housing Gasket for Sea-Doo

This water pump housing gasket for Sea-Doo seals the pump housing on the 1630 engine and carries OEM cross-reference 420950840.

Overview

This water pump housing gasket for Sea-Doo is the sealing component that sits between the pump housing and its mating surface on the 1630 engine. The gasket for Sea-Doo prevents coolant leaks at the housing joint so the cooling system holds pressure and keeps the engine at temperature. It suits riders servicing a 2018 RXP P X 300 or anyone rebuilding the water pump circuit.

Built For Performance

• Direct replacement for OEM reference 420950840
• Seals the water pump housing joint against coolant weep
• Formed to match the 1630 engine housing footprint
• Resists coolant and heat cycling under sustained load
• Installs with standard hand tools during pump service

Fits These Machines

• for Sea-Doo RXP P X 300 1630, 2018

On-The-Job Use

• Water pump housing reseals on the 1630 engine
• Cooling system service after coolant loss
• Impeller or pump rebuild jobs
• Routine maintenance before a riding season

Specs At A Glance

Good To Know

Q: Should this gasket be replaced every time the housing is opened? A: Yes, a fresh gasket for Sea-Doo should go on whenever the housing is removed, since a compressed gasket loses its seal. Reusing an old one risks a coolant leak at the joint.

Q: Do I need gasket sealant with this part? A: Most water pump housing gaskets seat dry on a clean, flat surface. Follow the service manual for your model, and remove all old gasket material before fitting.

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