420950772 Head Gasket for Sea-Doo GTX STD 1503 2004-2006

Head Gasket for Sea-Doo GTX STD 1503

This head gasket, part number 420950772, seals the cylinder head to the engine block on the 1503 engine, keeping combustion pressure and coolant where they belong.

Overview

This head gasket for Sea-Doo GTX STD 1503 watercraft provides a critical seal between the cylinder head and engine block. It is built to maintain compression and separate oil and coolant passages on the 1503 four-stroke engine. Riders and mechanics repairing a 2004 to 2006 GTX STD will find this head gasket an essential replacement for top-end service.

Built For Performance

• Multi-layer steel construction for reliable sealing under high compression
• Precision-cut openings for oil and coolant passages
• Designed to withstand the heat cycles of the 1503 four-stroke engine
• Direct fit for the cylinder head mating surface
• Cross-references OEM part number 420950772

Fits These Machines

• for Sea-Doo GTX STD 1503 (2004)
• for Sea-Doo GTX STD 1503 (2005)
• for Sea-Doo GTX STD 1503 (2006)

On-The-Job Use

• Top-end rebuilds on the 1503 engine
• Cylinder head removal and reinstallation
• Compression loss diagnosis and repair
• Coolant or oil leak correction at the head

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 on reassembly. Always follow the factory torque sequence and specification for the 1503 engine.

Q: Can this gasket be reused if the head is removed again? A: Head gaskets are single-use items and should be replaced each time the cylinder head is removed. Reusing a compressed gasket risks sealing failure.

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