420950820 Valve Cover Gasket for Sea-Doo RXT IS 255 1503 2009

Valve Cover Gasket for Sea-Doo RXT IS 255 1503

This valve cover gasket replaces OEM part 420950820 to seal the valve cover on Sea-Doo RXT IS 255 1503 engines, keeping oil contained and preventing leaks at the cover mating surface.

Overview

This valve cover gasket is a direct replacement seal for the 1503 engine found in Sea-Doo RXT IS 255 watercraft. It sits between the valve cover and cylinder head to stop oil seepage and keep the top end sealed under heat and vibration. Owners performing routine top-end maintenance or chasing an oil weep will find this valve cover gasket a practical fit.

Built For Performance

• Direct replacement for OEM part 420950820
• Precision-cut to match the valve cover mating surface
• Resists engine oil, heat, and repeated thermal cycling
• Seals the top end against oil seepage under load
• Simple install during valve cover removal or top-end service

Fits These Machines

• for Sea-Doo RXT IS 255 1503 (2009)

On-The-Job Use

• Routine top-end maintenance on the 1503 engine
• Replacing a worn or weeping valve cover gasket
• Valve cover removal for inspection or repair
• Rebuilds and reseals after engine work

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: No, this is an aftermarket valve cover gasket made to replace OEM 420950820. It is not manufactured by or affiliated with Sea-Doo.

Q: Do I need to replace it every time the valve cover comes off? A: Gaskets can compress and harden over time, so replacing it while the cover is off helps avoid a future oil leak. Inspect the old gasket for flattening or cracking before reuse.

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