420950840 Water Pump Housing Gasket for Sea-Doo Challenger SP 155 1503 2009

Water Pump Housing Gasket for Sea-Doo

This water pump housing gasket seals the pump housing on Sea-Doo 1503 and 155 engines, keeping coolant contained and protecting the impeller assembly from leaks.

Overview

This water pump housing gasket is a replacement sealing component for the water pump assembly on Sea-Doo 1503 and 155 engines. It creates a tight seal between the pump housing halves to prevent coolant leaks and maintain proper cooling system pressure. This gasket suits riders performing routine pump maintenance or rebuilding a leaking water pump on their Sea-Doo watercraft.

Built For Performance

• Precision-cut to match the water pump housing mating surface
• Coolant-resistant material holds up to constant immersion and heat cycling
• Compressible construction seals minor surface imperfections
• Direct replacement for OEM part number 420950840
• Withstands the pressure and temperature demands of marine cooling systems

Fits These Machines

• for Sea-Doo Challenger SP 155 with 1503 engine, 2009

On-The-Job Use

• Water pump rebuilds and resealing during routine maintenance
• Cooling system repairs after overheating or coolant loss
• Impeller or wear ring service where the pump housing is opened
• Winterizing and pre-season pump inspection

Specs At A Glance

Good To Know

Q: Does this gasket fit both pump housing halves? A: This gasket is shaped for the water pump housing mating surface on the Sea-Doo 1503 and 155 engines. Confirm the pump housing part number on your machine matches before ordering.

Q: Should I replace this gasket every time the pump is opened? A: Yes, a fresh gasket is recommended any time the pump housing is separated since old gaskets compress and may not reseal properly. Reusing a worn gasket risks 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.