420950840 Water Pump Housing Gasket for Sea-Doo Islandia SE 430 1503 2008

Water Pump Housing Gasket for Sea-Doo

This water pump housing gasket for Sea-Doo seals the mating surface between the pump housing and engine case, cross-referencing OEM part 420950840 to help keep coolant where it belongs.

Overview

This water pump housing gasket for Sea-Doo is a direct-seal replacement that stops coolant weepage at the pump housing joint. The gasket for Sea-Doo 1503 engines is shaped to match the housing face and compresses evenly under torque. It suits riders and rebuilders servicing the Islandia SE 430 cooling system.

Built For Performance

• Cross-references OEM part 420950840 for straightforward lookup
• Precision-cut profile matches the 1503 water pump housing face
• Compressible sealing material accommodates minor surface imperfections
• Resists coolant exposure and heat cycling under normal operating temperatures
• Thin, uniform gauge supports consistent clamp load across the joint

Fits These Machines

• for Sea-Doo Islandia SE 430 1503, 2008

On-The-Job Use

• Water pump housing reseal during cooling system service
• Reassembly after impeller or housing inspection
• Leak repair at the pump housing mating surface
• Routine maintenance on 1503 equipped watercraft

Specs At A Glance

Good To Know

Q: Can this gasket be reused if the housing is removed again? A: No, sealing gaskets of this type are meant for single installation and should be replaced each time the housing is separated. Reusing one risks a coolant leak at the joint.

Q: Should sealant be applied with this gasket? A: Follow the service manual for the 1503 engine, which typically specifies a dry install unless stated otherwise. Excess sealant can migrate and obstruct coolant passages.

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