420950772 Head Gasket for Sea-Doo Sport 21-230 1630 2022-2025

Head Gasket for Sea-Doo

This head gasket for Sea-Doo 1630 engine applications seals the cylinder head to the block and maintains proper compression on Sport 21-230 models; it references OEM part number 420950772.

Overview

This head gasket for Sea-Doo is a sealing component designed for the 1630 engine platform on 2022-2025 Sport 21-230 watercraft. It seals the mating surface between the cylinder head and engine block to contain combustion pressure and coolant. It suits riders performing top-end service or rebuild work who need a dependable replacement head gasket for Sea-Doo 1630 powerplants.

Built For Performance

• Precision-cut to match 1630 engine cylinder head sealing surfaces
• OEM cross-reference 420950772 for straightforward part matching
• Multi-layer construction engineered to handle high combustion pressures
• Seals both combustion chambers and coolant passages
• Designed for marine engine heat cycles and continuous load use
• Direct replacement for the original gasket during top-end service

Fits These Machines

• for Sea-Doo Sport 21-230 1630 (2022-2025)

On-The-Job Use

• Top-end rebuilds on 1630 equipped Sport 21-230 watercraft
• Restoring compression after a blown or leaking head gasket
• Cylinder head removal and reinstallation service
• Preventive replacement during scheduled engine teardown

Specs At A Glance

Good To Know

Q: Does this gasket fit all 1630 engines? A: It is listed for the 2022-2025 Sport 21-230 with the 1630 engine and crosses to 420950772, so verify your engine and serial number before ordering. Q: Should head bolts be replaced at the same time? A: Many technicians recommend new head bolts during a top-end rebuild, so check your service manual for the correct torque sequence and fastener guidance.

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