Sierra 18-7913 4-Stroke Oil Filter for Mercury, Honda Sierra high-quality replacement oil filters are designed to meet or exceed OEM specifications. Thread Spec 20mm x 1.5 Fits 89.9 HP OBs 323cc, 1520 HP carbureted OBs, and 2530 HP EFI MY2006 Newer. Fits 2530 hp Mercury EFI 4-strokes, model years 2006 and up sn OT801000 and up utilizing the 498492cc cylinder block. Engineered with premium grade materials that will excel in the extreme marine environment Epoxy coated for corrosion resistance Hea