420950772 Head Gasket for Sea-Doo GTX Std NA 1503 2007

Head Gasket for Sea-Doo

This head gasket, part number 420950772, seals the cylinder head to the engine block on compatible Sea-Doo personal watercraft to maintain proper compression and cooling.

Overview

This head gasket is a direct sealing component for the Sea-Doo 1503 engine, keeping combustion gases, oil, and coolant contained where they belong. It is built to restore a proper head-to-block seal during top-end service on the 2007 GTX Std NA. Install this head gasket when replacing a blown or weeping gasket to protect compression and cooling performance.

Built For Performance

• Precision-cut to match the 1503 engine head and cylinder mating surfaces
• Constructed from gasket material engineered to withstand high combustion temperatures
• Seals combustion chambers to help maintain consistent compression
• Helps prevent coolant and oil from crossing between passages
• Designed as a direct replacement for part number 420950772

Fits These Machines

• for Sea-Doo GTX Std NA 1503, 2007

On-The-Job Use

• Top-end rebuilds after a blown head gasket
• Engine tear-down and refresh on the 1503 platform
• Restoring a proper seal after cylinder head removal
• Routine maintenance on compatible Sea-Doo watercraft

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, so check your service manual for the 1503 engine before reassembly. Following the correct torque sequence helps the gasket seal properly.

Q: Can I reuse this head gasket if I remove the head again? A: No, a head gasket is a single-use crush-type seal and should always be replaced once the head is removed. Reusing it risks leaks and lost compression.

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