420950772 Head Gasket for Sea-Doo Wake 310 1503 2010-2011

Head Gasket for Sea-Doo

This head gasket (OEM cross-reference 420950772) seals the cylinder head to the engine block on 1503-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 in Sea-Doo personal watercraft. It maintains the critical seal between the cylinder head and engine block, preventing compression loss and coolant migration. Built for riders and mechanics servicing the Wake 310 platform.

Built For Performance

• Precision-cut to match the 1503 cylinder head and block mating surfaces
• OEM cross-reference 420950772 for straightforward parts matching
• Multi-layer construction designed to handle high compression and heat cycles
• Seals both combustion chambers and coolant passages
• Direct replacement for worn or blown head gaskets

Fits These Machines

• for Sea-Doo Wake 310 with 1503 engine, 2010-2011

On-The-Job Use

• Top-end rebuilds after overheating or compression loss
• Cylinder head removal and reinstallation
• Routine engine refresh on high-hour watercraft
• Coolant leak repair at the head-to-block joint

Specs At A Glance

Good To Know

Q: Do I need to replace head bolts when installing this gasket? A: Many manufacturers recommend new torque-to-yield head bolts for the 1503 engine, so check your service manual before reassembly. Reusing stretched bolts can cause uneven clamping and premature gasket failure.

Q: How do I know if my head gasket has failed? A: Common signs include white exhaust smoke, coolant loss without visible leaks, and low compression on one or more cylinders. A compression or leak-down test confirms the diagnosis before you tear into the top end.

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