420950820 Valve Cover Gasket for Sea-Doo Challenger SE 155 1503 2007-2009

Valve Cover Gasket for Sea-Doo Challenger / SE 155 1503

This valve cover gasket for Sea-Doo Challenger / SE 155 1503 models seals the valve cover to the cylinder head, preventing oil leaks on 2007 through 2009 personal watercraft and jet boats. It matches OEM part number 420950820.

Overview

This valve cover gasket is a direct-fit sealing component for the Sea-Doo 1503 engine used in Challenger and SE series watercraft from 2007 to 2009. The gasket creates a tight seal between the valve cover and cylinder head, keeping oil contained and preventing leaks that can foul the engine bay. It is built for owners performing routine maintenance or top-end repairs on their Sea-Doo 1503 powerplant.

Built For Performance

• Precision-cut to match OEM part number 420950820 for a direct fit
• Constructed from oil-resistant material rated for continuous engine heat cycling
• Maintains a consistent seal across the valve cover mating surface
• Resists compression set to hold torque over repeated heat cycles
• Designed for the 1503 four-stroke engine family found in Challenger and SE models

Fits These Machines

• for Sea-Doo Challenger 155 1503 (2007-2009)
• for Sea-Doo Challenger SE 155 1503 (2007-2009)

On-The-Job Use

• Valve cover resealing during top-end service
• Oil leak repair on the 1503 engine
• Routine maintenance on Challenger and SE watercraft
• Engine rebuilds requiring new sealing components

Specs At A Glance

Good To Know

Q: Does this gasket fit both the 155 and SE versions of the Challenger? A: Yes, it is listed for the Challenger and Challenger SE 155 models equipped with the 1503 engine from 2007 to 2009. Confirm your engine code and serial number before ordering.

Q: Is this an OEM Sea-Doo part? A: This is an aftermarket valve cover gasket that cross-references OEM part number 420950820. It is not an original Sea-Doo branded component.

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