420850500 Oil Filter Cover O-Ring for Sea-Doo Sport 21-300 1630 2026

Oil Filter Cover O-Ring for Sea-Doo Sport 21-300 1630

This oil filter cover O-ring seals the filter housing on the Sea-Doo Sport 21-300 1630, replacing OEM part 420850500 to prevent oil seepage at the cover.

Overview

This oil filter cover O-ring is a direct replacement seal for the Sea-Doo Sport 21-300 1630 oil filter housing, cross-referenced to OEM 420850500. It seats between the filter cover and housing to keep oil contained under normal operating pressure. A smart pick for riders doing their own routine maintenance on this personal watercraft.

Built For Performance

• Cross-references OEM part number 420850500
• Seals the oil filter cover to the housing
• Resists hot engine oil and typical marine conditions
• Simple install during routine oil and filter service
• Keeps the filter housing free of seepage

Fits These Machines

• for Sea-Doo Sport 21-300 1630, 2026

On-The-Job Use

• Routine oil and filter changes
• Filter cover resealing after service
• Preventing oil seepage at the housing
• Seasonal maintenance on personal watercraft

Specs At A Glance

Good To Know

Q: How often should this O-ring be replaced? A: Replacing it at each oil filter service is the safest practice, since a worn or flattened O-ring is the usual cause of cover seepage. Always confirm it matches your model before installing.

Q: Is this the same as OEM 420850500? A: It is an aftermarket O-ring cross-referenced to OEM 420850500 for the Sea-Doo Sport 21-300 1630. Confirm your part number and serial number before ordering.

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