420950772 Head Gasket for Sea-Doo Challenger SE 430 1503 2008-2011

Head Gasket for Sea-Doo Challenger SE 430

The Sea-Doo Challenger SE 430 1503 head gasket, OEM cross-reference 420950772, seals the cylinder head to the block on 2008-2011 boats and keeps combustion pressure and coolant where they belong.

Overview

This replacement head gasket is made for the Sea-Doo Challenger SE 430 1503 engine sold from 2008-2011. It seats between the deck and cylinder head to seal combustion chambers and coolant passages under heat and pressure. A solid pick for owners handling a top-end job after a leak, overheat, or failed gasket.

Built For Performance

• OEM cross-reference 420950772 for direct part matching
• Reinforced multi-layer construction to handle combustion pressure
• Seals coolant and oil passages between head and block
• Cut to OEM dimensions for a precise sealing surface
• Fits the 1503 engine used across the 2008-2011 model range

Fits These Machines

• for Sea-Doo Challenger SE 430 1503
• for Sea-Doo 1503 engine applications
• for 2008-2011 model years

On-The-Job Use

• Top-end teardown after a compression fault
• Coolant loss or white exhaust smoke on the water
• Head gasket service with the head off the block
• Post-overheat rebuilds on the 1503 engine

Specs At A Glance

Good To Know

Q: Will this fit a 2008 Challenger SE 430? A: It is listed for the Sea-Doo Challenger SE 430 1503 across 2008-2011 with OEM cross-reference 420950772. Check your service manual part number before ordering.

Q: Should the head be checked before installing a new gasket? A: Yes, having the head inspected for flatness and cracks is standard practice on aluminum heads. Skipping that step risks an early repeat failure.

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