420950840 Water Pump Housing Gasket for Sea-Doo GTI STD 155 1503 2017

Water Pump Housing Gasket for Sea-Doo

This water pump housing gasket seals the pump housing on the 1503 engine, replacing OEM part 420950840 to prevent coolant leaks.

Overview

This water pump housing gasket for Sea-Doo is a direct-fit sealing component for the 1503 engine found in the 2017 GTI STD 155. The gasket sits between the water pump housing and the engine case, creating a tight seal that keeps coolant flowing where it should. It suits riders performing routine pump maintenance or replacing a worn, leaking gasket.

Built For Performance

• Cross-references OEM part number 420950840 for straightforward matching
• Formed to match the water pump housing mating surface for a precise fit
• Resists coolant, heat, and pressure cycling in marine engine conditions
• Helps prevent coolant leaks that can lead to overheating
• Direct replacement item for routine pump service

Fits These Machines

• for Sea-Doo GTI STD 155 1503 (2017)

On-The-Job Use

• Water pump housing resealing during routine maintenance
• Coolant leak repair on the 1503 engine
• Pump rebuilds and impeller service jobs

Specs At A Glance

Good To Know

Q: Does this gasket fit other Sea-Doo models? A: This gasket is listed for the 2017 GTI STD 155 with the 1503 engine. Confirm your model, engine, and part number before ordering.

Q: Should I replace the gasket every time I open the pump housing? A: Yes, a fresh gasket is standard practice whenever the housing is removed to prevent leaks. Reusing an old gasket risks coolant seepage 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.