420950772 Head Gasket for Sea-Doo Fish Compact 170 1630 2026

Head Gasket for Sea-Doo

This head gasket is a sealing component that sits between the cylinder head and engine block on your watercraft, and it is built to cross-reference OEM part number 420950772.

Overview

This head gasket is a replacement sealing component for the 1630 engine used across several watercraft models. It seals the combustion chamber and coolant passages so the engine can hold proper compression and keep fluids where they belong. It suits riders performing top-end maintenance on their personal watercraft.

Built For Performance

• Precision-cut to match the 1630 engine cylinder head mating surface
• Cross-references OEM part number 420950772 for easy verification
• Seals combustion pressure and coolant passages at the head joint
• Manufactured from gasket material rated for high engine temperatures
• Direct replacement for a worn or blown head gasket

Fits These Machines

• for Sea-Doo Fish Compact 170 1630, 2026

On-The-Job Use

• Top-end rebuilds after a blown head gasket
• Cylinder head removal and reinstallation jobs
• Routine engine teardown and inspection work
• Restoring compression on the 1630 engine

Specs At A Glance

Good To Know

Q: Should I replace head bolts at the same time? A: Many manufacturers recommend new torque-to-yield head bolts whenever the head is removed. Follow the service manual for your specific model.

Q: How do I know the old gasket failed? A: Common signs include coolant loss, white exhaust smoke, or low compression. A leak-down or compression test can confirm the diagnosis.

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