420950840 Water Pump Housing Gasket for Sea-Doo Fish 21-230 1630 2025-2026

Water Pump Housing Gasket for Sea-Doo Fish 21-230 1630

This water pump housing gasket for Sea-Doo seals the pump housing to the engine on the Fish 21-230 1630, holding coolant pressure and flow steady; it cross-references OEM 420950840.

Overview

This water pump housing gasket for Sea-Doo is the sealing element that sits between the water pump housing and the engine on the Fish 21-230 1630. It keeps coolant contained at the housing joint so the cooling system holds pressure and circulates properly. It suits owners and technicians servicing 2025 to 2026 models during pump repair or rebuild.

Built For Performance

• Dimensional match to the pump housing mating surface
• Withstands coolant exposure and repeated heat cycles
• Seals passages against seepage and pressure loss
• Cross-references OEM part number 420950840
• Slim gasket profile preserves correct housing clearance
• Fits with standard pump service tools

Fits These Machines

• for Sea-Doo Fish 21-230 1630, 2025
• for Sea-Doo Fish 21-230 1630, 2026

On-The-Job Use

• Water pump housing resealing during scheduled service
• Cooling system repair after a leak at the housing joint
• Pump rebuild on 2025 and 2026 Fish 21-230 1630 models
• Preventative replacement while the engine is apart

Specs At A Glance

Good To Know

Q: Is this gasket sold individually or as part of a kit? A: It is supplied as a single water pump housing gasket for the Fish 21-230 1630. Check your service procedure for any additional seals or O-rings you may need.

Q: Should the housing bolts be retorqued after installation? A: Follow the manufacturer torque sequence and values for the water pump housing. Correct torque helps the gasket seat evenly and hold a lasting coolant seal.

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