420950772 Head Gasket for Sea-Doo Challenger S/C 215 1503 2005-2009

Head Gasket for Sea-Doo

This head gasket for Sea-Doo 1503 engines seals the cylinder head to the block, helping maintain compression and hold back coolant and oil, and it replaces OEM part 420950772.

Overview

This head gasket for Sea-Doo 1503 engines is a replacement seal for the supercharged 215 HP powerplant used in the Challenger S/C. It sits between the cylinder head and engine block to keep combustion pressure contained and coolant in its proper passage. It is meant for owners tackling a top-end job or replacing a leaking gasket on their 1503 Rotax engine.

Built For Performance

• Multi-layer steel construction rated for the heat and cylinder pressure of a supercharged marine engine
• Combustion openings sized to the 1503 cylinder bore
• Precisely cut coolant and oil holes to match factory passages
• Designed to seal correctly under the boost levels of the 215 HP engine
• Replaces OEM part number 420950772

Fits These Machines

• for Sea-Doo Challenger S/C 215 (2005-2009)
• for Sea-Doo 1503 engines with 215 HP rating

On-The-Job Use

• Head gasket replacement after compression loss
• Top-end rebuilds on supercharged 1503 engines
• Head removal for valve or piston work on a Challenger S/C
• Seasonal maintenance on 2005-2009 Challenger boats

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo gasket? A: No, it is a replacement head gasket built to fit Sea-Doo 1503 engines that use OEM number 420950772.

Q: Do I need to replace head bolts as well? A: Many 1503 rebuilds call for new torque-to-yield head bolts, so check your service manual before reassembly.

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