420950772 Head Gasket for Sea-Doo Sport 18-230 1630 2022-2025

Head Gasket 420950772 for Sea-Doo

The Head Gasket 420950772 for Sea-Doo seals the cylinder head to the engine block, restoring compression and preventing coolant and combustion leaks on 1630 engine platforms. Cross-references OEM part number 420950772 for a direct-fit replacement.

Overview

This head gasket for Sea-Doo is a sealing component that sits between the cylinder head and block on 1630 engines, keeping compression, coolant, and oil where they belong. It is built for riders and mechanics servicing Sea-Doo Sport 18-230 models from 2022 to 2025. Choose this head gasket for Sea-Doo when a blown or weeping gasket needs a dependable replacement.

Built For Performance

• Direct cross-reference to OEM part number 420950772
• Multi-layer construction resists high cylinder pressures
• Seals coolant passages against leakage under heat cycling
• Maintains compression for consistent engine output
• Precision-cut openings match 1630 engine port layout

Fits These Machines

• for Sea-Doo Sport 18-230 1630 (2022-2025)

On-The-Job Use

• Top-end rebuilds after overheating or gasket failure
• Routine engine refresh on high-hour 1630 powerplants
• Coolant leak diagnosis and repair at the cylinder head joint
• Compression restoration on Sport 18-230 watercraft

Specs At A Glance

Good To Know

Q: Should head bolts be replaced when installing this gasket? A: Many torque-to-yield head bolts are single-use, so check the service manual for your 1630 engine and replace them if specified. Reusing stretched bolts can cause uneven clamping and premature gasket failure.

Q: Is surface preparation required before installation? A: Yes, the cylinder head and block decks should be clean, flat, and free of old gasket residue before this head gasket goes on. Any warping or pitting at the mating surfaces should be corrected first.

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