420950840 Water Pump Housing Gasket for Sea-Doo Sportster 155 1503 2003-2006

Water Pump Housing Gasket for Sea-Doo

This Water Pump Housing Gasket seals the housing to the engine on personal watercraft, keeping coolant contained and flow steady, and cross-references OEM part number 420950840.

Overview

This Water Pump Housing Gasket is a direct-fit sealing component for the Sea-Doo 1503 engine water pump assembly. The gasket sits between the pump housing and its mounting surface to create a tight, leak-free seal. It is built for riders and mechanics servicing the Sportster 155 and similar models.

Built For Performance

• Precision-cut to match the housing bolt pattern and coolant passages
• Seals the housing face against coolant seepage under pressure
• Withstands the heat cycling typical of marine engine operation
• Resists coolant and water exposure for lasting service
• Simple to install during routine water pump service

Fits These Machines

• for Sea-Doo Sportster 155 with the 1503 engine, 2003-2006

On-The-Job Use

• Water pump rebuilds and reseals on the 1503 engine
• Routine cooling system maintenance
• Leak repairs at the pump housing mating surface

Specs At A Glance

Good To Know

Q: Should I replace this gasket every time I open the pump housing? A: Yes, gaskets are single-use sealing parts, so a fresh one each time helps prevent coolant leaks.

Q: Does this gasket come with the housing or bolts? A: No, this listing is for the gasket only, so reuse your existing housing and hardware.

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