420950772 Head Gasket for Sea-Doo Wake Std 155 1503 2017

Head Gasket for Sea-Doo

The head gasket, part number 420950772, seals the cylinder head to the engine block on the 1503 engine, keeping compression and coolant in their proper places.

Overview

This head gasket is a direct-fit sealing component for the Sea-Doo 1503 engine used in the Wake Std 155. It seals the junction between the cylinder head and the engine block, maintaining compression and preventing coolant and oil from crossing paths. A smart pick for riders replacing a blown gasket or refreshing the top end on a 2017 Wake Std 155.

Built For Performance

• Precision-cut to match the 1503 cylinder head and block mating surfaces
• Multi-layer construction engineered to hold compression under load
• Seals combustion, coolant, and oil passages in a single fit
• Heat-resistant material suited to marine engine operating temperatures
• Direct replacement for OEM part number 420950772

Fits These Machines

• for Sea-Doo Wake Std 155 (2017) with 1503 engine

On-The-Job Use

• Top-end rebuilds after a blown head gasket
• Cylinder head removal and reinstallation jobs
• Routine engine refresh on high-hour 1503 powerplants
• Compression loss diagnosis and repair

Specs At A Glance

Good To Know

Q: Should I replace the head bolts when installing this gasket? A: Many marine engine builders recommend new head bolts or a torque-to-yield check on reused hardware, since clamping force matters for a lasting seal. Follow the service manual torque sequence for the 1503 engine.

Q: Can I reuse this gasket if the head comes back off? A: No, a head gasket is a single-use item, and once compressed it should be replaced rather than reinstalled. Always fit a fresh gasket when the head is removed.

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