420950840 Water Pump Housing Gasket for Sea-Doo Fish 18-230 1630 2025-2026

Water Pump Housing Gasket for Sea-Doo

This water pump housing gasket for Sea-Doo provides a precise sealing surface for the cooling system, cross-referenced to OEM part 420950840.

Overview

The water pump housing gasket for Sea-Doo is a direct-fit sealing component that prevents coolant leaks where the pump housing meets the engine block. This gasket for Sea-Doo keeps the cooling circuit sealed under pressure so your 1630cc engine maintains proper operating temperature. It suits riders performing routine maintenance or replacing a worn gasket on their 2025-2026 Fish 18-230 machine.

Built For Performance

• Cross-referenced to OEM part number 420950840
• Seals the water pump housing against the engine block
• Withstands constant exposure to coolant and heat cycling
• Preformed shape for correct alignment during installation
• Fits 1630cc engine applications

Fits These Machines

• for Sea-Doo Fish 18-230 1630, 2025-2026

On-The-Job Use

• While replacing a leaking water pump housing gasket
• During scheduled cooling system maintenance
• When servicing the water pump on a 1630cc Sea-Doo engine

Specs At A Glance

Good To Know

Q: Does this gasket need sealant during installation? A: Preformed gaskets of this type typically install dry, though some mechanics apply a thin film of gasket dressing. Check your service manual for the recommended method.

Q: Can I reuse the old gasket if it looks intact? A: Compression gaskets are single-use, so fit a new one whenever the housing is removed. Reusing a worn gasket risks coolant leaks and overheating.

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