420950772 Head Gasket for Sea-Doo Speedster 310 1503 2008

Head Gasket for Sea-Doo 1503

This head gasket (OEM cross-reference 420950772) is a replacement sealing component that fits between the cylinder head and engine block to maintain compression and prevent coolant or oil leaks on Sea-Doo 1503 engines.

Overview

This head gasket (OEM cross-reference 420950772) is a direct-fit sealing component for the Sea-Doo 1503 engine platform. A head gasket maintains a tight seal between the cylinder head and engine block, preserving compression and keeping coolant and oil in their proper passages. This gasket suits riders and mechanics servicing a Sea-Doo 1503 who want a reliable replacement without paying original-brand pricing.

Built For Performance

• OEM cross-reference 420950772 for accurate fitment on the Sea-Doo 1503 engine
• Seals the cylinder head to the engine block to preserve compression
• Prevents coolant and oil from mixing or leaking at the head surface
• Constructed to withstand the heat and pressure of marine engine operation
• Direct replacement for the factory head gasket on compatible 1503 engines

Fits These Machines

• for Sea-Doo Speedster 310 powered by the 1503 engine (2008)
• for Sea-Doo 1503 engine applications using part 420950772

On-The-Job Use

• Cylinder head resealing during top-end engine service
• Compression restoration on worn or leaking head gaskets
• Routine rebuild work on Sea-Doo 1503 marine engines
• Coolant and oil leak repair at the cylinder head mating surface

Specs At A Glance

Good To Know

Q: How do I know if my head gasket needs replacing? A: Common signs include loss of compression, coolant in the oil, oil in the coolant, or visible seepage at the cylinder head seam. A compression or leak-down test can confirm the gasket has failed.

Q: Should I replace other components at the same time? A: When replacing a head gasket, many mechanics also inspect the cylinder head for warping and replace head bolts if they are torque-to-yield. Follow the manufacturer's torque sequence and specifications for best results.

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