420950772 Head Gasket for Sea-Doo Fish 18-230 1630 2025-2026

Head Gasket 420950772 for Sea-Doo

The Head Gasket 420950772 for Sea-Doo is a sealing component that fits between the cylinder head and engine block to maintain compression and keep coolant and oil where they belong on personal watercraft.

Overview

This Head Gasket 420950772 for Sea-Doo is designed to seal the cylinder head to the engine block on select Fish 18-230 1630 models. The Head Gasket 420950772 for Sea-Doo serves as a direct-fit replacement sealing component, and it is intended for owners and technicians performing top-end service on these watercraft.

Built For Performance

• Seals the cylinder head-to-block joint under high compression
• Construction designed to handle heat cycling in marine engines
• Direct-fit profile for the 1630 engine platform
• OEM cross-reference 420950772
• Supports proper compression retention when torqued to spec

Fits These Machines

• for Sea-Doo Fish 18-230 1630, 2025-2026

On-The-Job Use

• Top-end rebuilds after overheating or gasket failure
• Routine engine service on the 1630 platform
• Repair work following coolant or compression issues

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: No, this is a replacement head gasket cross-referenced to 420950772 and is not an original brand product. Always confirm compatibility with your specific model and serial number before ordering.

Q: Can I reuse an old head gasket? A: No, head gaskets are single-use sealing components and should always be replaced once removed. Follow the manufacturer torque sequence and specification during installation.

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