Mercury - 4-Stroke Engine Oil Filter Verado L4 Series Steel Canister 877767K01. Overview. Anyone who's spent long days trimming through chop or cruising a winding coastline knows how much trust we place in our engines. And when that engine is a Mercury Verado, you expect nothing less than smooth, effortless performance every time you hit the throttle. The 877767K01 Oil Filter plays a quiet but vital role in that dependability. It gives you the kind of protection that lets you settle in behind th