420950840 Water Pump Housing Gasket for Sea-Doo GTI SE 155 1503 2008-2019

Water Pump Housing Gasket for Sea-Doo

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

Overview

This water pump housing gasket for Sea-Doo is a direct-fit sealing component made to sit between the pump housing and the mounting surface. It prevents coolant and water from escaping the pump assembly while keeping the impeller housing properly sealed under pressure. It suits riders and home mechanics servicing 1503-powered Sea-Doo watercraft.

Built For Performance

• Precision-cut profile sized to the stock housing bolt pattern and port openings
• Sealing material rated for the heat and moisture common to marine cooling systems
• Compresses evenly across the mating surface to resist weeping and pressure loss
• Replaces OEM 420950840 for straightforward swap-in service
• Single-piece gasket that installs without trimming or modification

Fits These Machines

• for Sea-Doo GTI SE 155 with 1503 engine, model years 2008 through 2019
• for Sea-Doo models sharing the 1503 water pump housing assembly

On-The-Job Use

• Pump housing reseal during impeller or wear ring service
• Routine cooling system maintenance before the riding season
• Repair after overheating or a suspected water leak at the housing
• Freshwater and saltwater recreational riding

Specs At A Glance

Good To Know

Q: Can this gasket be reused if the housing has to come off again? A: No, gaskets are single-use, so fit a fresh one any time the housing is separated. Reusing a compressed gasket risks a coolant or water leak.

Q: Should I clean the mating surfaces before installing it? A: Yes, remove all old gasket residue and degrease both surfaces so the new gasket seats flat. A clean surface means a far better seal.

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