Mercury Outboard Oil Filter 30 40 50 60 EFI SEA PRO 3-Cylinder 4-Cylinder - 35-8M0162829 Supersedes 35-8M0065104 -4 Pack. Keeping an outboard engine running smoothly isn't just about adding oil-it's about making sure that oil stays clean and free of contaminants. The Mercury Outboard Oil Filter (35-8M0162829) 4-Pack is built for that exact job, providing top-tier filtration for Mercury and Mariner four-stroke engines. Designed for 30-60 HP EFI models, as well as select 3-cylinder and 4-cylinder SeaPro engines, these filters help reduce wear, extend engine life, and maintain consistent oil flow in all conditions.. Engineered for Reliable Performance. Precision Filtration - Removes fine particles that could lead to sludge buildup and engine wear, keeping oil cleaner for longer.. Anti-Drain Back Valve - Holds oil in place after shutdown, ensuring smooth startups and reducing the risk of dry starts.. Corrosion-Resistant Design - Heavy-duty electroplated housing protects against saltwater e