420950772 Head Gasket for Sea-Doo Challenger S 1 x 260 1503 2012

Head Gasket for Sea-Doo

This head gasket, part number 420950772, seals the cylinder head to the engine block on your personal watercraft to maintain proper compression and coolant flow.

Overview

This head gasket is a direct-fit sealing component for the Sea-Doo 1503 engine. It sits between the cylinder head and block to prevent compression loss and coolant leaks. This head gasket suits riders performing top-end rebuilds or routine engine maintenance.

Built For Performance

• Precision-cut to match the 1503 engine's cylinder head mating surface
• Constructed from multi-layer steel for reliable sealing under high compression
• Withstands the heat cycling typical of marine engine operation
• Designed to maintain proper coolant separation between head and block
• OEM cross-reference 420950772 ensures correct fitment

Fits These Machines

• for Sea-Doo Challenger S 1503 2012

On-The-Job Use

• Top-end engine rebuilds on the 1503 powerplant
• Cylinder head removal and reinstallation service
• Coolant leak repair at the head-to-block joint
• Compression restoration after gasket failure

Specs At A Glance

Good To Know

Q: Does this gasket require new head bolts during installation? A: Check your service manual for torque-to-yield bolt specs, as some applications require replacement bolts. Always follow the manufacturer's torque sequence for the 1503 engine.

Q: Can I reuse this head gasket if I disassemble the engine again? A: No, head gaskets are single-use compression seals and should always be replaced once removed. Reusing a compressed gasket risks coolant leaks and compression loss.

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