420950772 Head Gasket for Sea-Doo Challenger Wake 155 1503 2007

Head Gasket for Sea-Doo

This head gasket seals the cylinder head to the engine block on select Sea-Doo Challenger Wake 155 and 1503 powered models, carrying OEM cross-reference 420950772.

Overview

This head gasket for Sea-Doo is a sealing component that sits between the cylinder head and engine block to contain combustion pressure and coolant. The gasket for Sea-Doo 1503 engines helps maintain proper compression and keeps oil and coolant from mixing. It is intended for riders and mechanics replacing a blown or leaking head gasket during top-end service.

Built For Performance

• Precision-cut to match the 1503 cylinder head sealing surface
• Construction designed to withstand high combustion temperatures
• Seals coolant and oil passages between head and block
• Cross-references OEM part number 420950772
• Suited to marine engine torque and heat cycles

Fits These Machines

• for Sea-Doo Challenger Wake 155
• for Sea-Doo 1503 powered models

On-The-Job Use

• Cylinder head reinstall after top-end rebuild
• Correcting compression loss from a failed gasket
• Repairing coolant or oil seepage at the head joint

Specs At A Glance

Good To Know

Q: Does this fit my 2007 Challenger Wake 155? A: It is listed for that model and the 1503 engine family. Confirm your serial number and engine code before ordering.

Q: Should I replace head bolts at the same time? A: Many marine engines use torque-to-yield fasteners that are not reusable. Check your service manual for whether new bolts are required.

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