420950772 Head Gasket for Sea-Doo Speedster 510 1503 2010-2011

Head Gasket for Sea-Doo

This head gasket for Sea-Doo replaces OEM part number 420950772, sealing the cylinder head to the engine block on the 1503 engine.

Overview

This head gasket for Sea-Doo is a direct-fit sealing component for the 1503 engine found in the Speedster 510. It maintains compression between the cylinder head and block while keeping coolant and combustion gases separated. Shop this head gasket for Sea-Doo when servicing the top end of a 2010 to 2011 Speedster 510.

Built For Performance

• Precision-cut to match OEM part 420950772
• Constructed for reliable compression sealing on the 1503 engine
• Resists heat cycling from repeated engine warm-up and cool-down
• Seals coolant passages between head and block
• Supports consistent combustion chamber sealing

Fits These Machines

• for Sea-Doo Speedster 510 1503, 2010-2011

On-The-Job Use

• Top-end rebuilds on the 1503 engine
• Head gasket replacement after overheating
• Routine engine refresh on the Speedster 510
• Compression loss diagnostics and repair

Specs At A Glance

Good To Know

Q: Does this gasket require new head bolts? A: Torque-to-yield head bolts should not be reused and are commonly replaced during a head gasket job on the 1503 engine.

Q: Is machining required before installation? A: Check head and block surfaces for flatness before installing this gasket, since warping from overheating can prevent a proper seal.

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