420950772 Head Gasket for Sea-Doo Wake 155 1503 2008-2016

Head Gasket for Sea-Doo

This head gasket 420950772 seals the cylinder head to the engine block on 1503 4-TEC powered watercraft, keeping compression contained and coolant where it belongs.

Overview

This head gasket is a direct-fit sealing component for the 1503 engine used across several Sea-Doo models. It installs between the cylinder head and block to maintain compression and separate coolant and oil passages. It is built for riders and mechanics servicing a Sea-Doo Wake 155 between 2008 and 2016.

Built For Performance

• Multi-layer steel construction resists heat and combustion pressure
• Precision-cut openings align with the 1503 head coolant and oil galleries
• Sealing surfaces sized to the 420950772 factory footprint
• Withstands the high cylinder pressures of a supercharged or naturally aspirated 1503
• Designed as a direct replacement for the original gasket

Fits These Machines

• for Sea-Doo Wake 155 with 1503 engine, 2008-2016

On-The-Job Use

• Top-end rebuilds after a blown head gasket
• Cylinder head removal for valve or piston service
• Compression loss diagnosis and repair
• Coolant intrusion or overheating repairs

Specs At A Glance

Good To Know

Q: Does this gasket require new head bolts? A: Torque-to-yield head bolts should be replaced whenever the head is removed, and this gasket pairs with a clean, flat deck surface for a reliable seal.

Q: Should I check head flatness before installing? A: Yes, warping is common after an overheat, and machining or replacing the head before installing this gasket prevents repeat failure.

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