420950840 Water Pump Housing Gasket for Sea-Doo RXT STD 260 1503 2017

Water Pump Housing Gasket for Sea-Doo

This water pump housing gasket seals the pump housing on 1503-powered personal watercraft, replacing OEM part 420950840 to keep the cooling circuit tight.

Overview

This water pump housing gasket is a direct-fit sealing component for the 1503 engine found in Sea-Doo RXT models. It sits between the pump housing and mating surface to prevent coolant leaks and maintain proper flow through the cooling system. Ideal for riders and shops performing routine pump service or a full rebuild.

Built For Performance

• Precision-cut to match the OEM 420950840 sealing profile
• Constructed from coolant-resistant gasket material
• Withstands the heat cycling of a marine cooling system
• Compresses evenly for a uniform seal across the housing face
• Direct replacement for worn, hardened, or leaking gaskets

Fits These Machines

• for Sea-Doo RXT 260 (2017)
• for Sea-Doo RXT STD 260 1503 (2017)
• for Sea-Doo RXT STDRS 260 1503 (2017)

On-The-Job Use

• Cooling system repairs on 1503-equipped Sea-Doo watercraft
• Water pump housing removal and reassembly
• Seasonal maintenance and leak correction
• Engine rebuild and refresh projects

Specs At A Glance

Good To Know

Q: Should this gasket be replaced every time the pump housing is opened? A: Yes, gaskets are single-use and should be swapped whenever the housing is separated to ensure a reliable seal.

Q: Does this gasket need any sealant? A: Install it dry unless the service manual specifies otherwise, and torque the housing fasteners to spec.

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