420950840 Water Pump Housing Gasket for Sea-Doo Sportster S/C 215 1503

Water Pump Housing Gasket for Sea-Doo

This water pump housing gasket seals the pump housing to the engine case on 1503-powered Sea-Doo models, and it cross-references OEM part number 420950840.

Overview

This water pump housing gasket provides a tight seal for the cooling pump assembly on the 1503 engine. It stops coolant seeping at the housing mating surface and suits riders doing pump service or a rebuild. The gasket is made to match OEM 420950840 fit and function.

Built For Performance

• Direct cross-reference to OEM part number 420950840
• Seals the water pump housing to the engine case mating surface
• Built to handle coolant exposure and heat cycling
• Made for the 1503 four-stroke engine platform
• Sold as a single replacement gasket

Fits These Machines

• for Sea-Doo Sportster S/C 215, 2005-2006

On-The-Job Use

• Water pump housing resealing during routine maintenance
• Cooling system repairs after overheating or coolant loss
• Impeller and wear ring service that requires housing removal
• Engine rebuilds where the pump housing is removed

Specs At A Glance

Good To Know

Q: Do I need to replace this gasket every time the housing comes off? A: Yes, a fresh gasket is recommended each time the housing is removed, since a used gasket can leak once compressed. Reusing an old gasket risks coolant loss and overheating.

Q: Should I apply sealant with this gasket? A: Follow the service manual for your model, as some installations call for a dry fit while others specify a sealant. Install the gasket flat with no twists or folds.

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