420950840 Water Pump Housing Gasket for Sea-Doo Fish 18-170 1630 2025

Water Pump Housing Gasket for Sea-Doo

This water pump housing gasket for Sea-Doo seals the cooling system at the pump housing, cross-referenced to OEM part 420950840.

Overview

The water pump housing gasket for Sea-Doo is a sealing component that prevents coolant leaks at the water pump housing mating surface. This gasket for Sea-Doo holds a tight seal through heat cycles so coolant flows correctly through the 1630cc engine. It suits owners of the 2025 Fish 18-170 doing routine cooling system service or replacing a failed gasket.

Built For Performance

• Cross-referenced to OEM part number 420950840
• Seals the water pump housing to the engine block
• Resists coolant exposure and repeated heat cycling
• Preformed shape for straightforward alignment
• Fits 1630cc engine applications

Fits These Machines

• for Sea-Doo Fish 18-170 1630, 2025

On-The-Job Use

• When replacing a leaking water pump housing gasket
• During routine cooling system maintenance
• While 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.