420950840 Water Pump Housing Gasket for Sea-Doo RXP X 255 1503 2008-2011

Water Pump Housing Gasket for Sea-Doo

This water pump housing gasket is a replacement sealing component made to fit the 1503 engine used in the Sea-Doo RXP X 255, cross-referenced to OEM part number 420950840.

Overview

This water pump housing gasket seals the joint between the water pump housing and the engine case on the 1503 platform. A fresh water pump housing gasket for Sea-Doo keeps coolant where it belongs and helps maintain proper flow through the cooling system. It is intended for riders and mechanics servicing the Sea-Doo RXP X 255 between 2008 and 2011.

Built For Performance

• Direct replacement for OEM part number 420950840
• Formed to match the water pump housing mating surface on the 1503 engine
• Seals the housing joint against coolant seepage under pressure
• Constructed from gasket material suited to constant coolant contact
• Sold as a single gasket for one housing installation

Fits These Machines

• for Sea-Doo RXP X 255, 2008-2011
• for Sea-Doo models equipped with the 1503 engine and matching housing

On-The-Job Use

• Water pump housing reseals during cooling system service
• Coolant leak repair at the pump housing joint
• Routine impeller or wear ring service that requires opening the housing
• Engine rebuilds and top-end refresh work

Specs At A Glance

Good To Know

Q: Does this gasket fit every 1503 water pump housing? A: It is listed for the Sea-Doo RXP X 255 from 2008 to 2011 and cross-references 420950840, so confirm your engine and housing match before ordering.

Q: Should the housing bolts be replaced at the same time? A: Gaskets are single-use once compressed, and any bolt showing corrosion or stretch should be replaced so the housing seals evenly.

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