This genuine Mercury Precision Parts FourStroke Outboard Oil Filter 8M0162831 provides outstanding filtering protection and factory fit for select Mercury and Mariner 8-30hp FourStroke outboards.Product Details Manufacturer part number: 35-8M0162831 Fits Mercury/Mariner 8/9.9hp FourStroke (323cc), 15/20hp carbureted FourStroke, 15/20hp EFI FourStroke (0R833820 and above), and 25/30hp EFI FourStroke (2006 and newer) outboards Superior M-Pleated cleansing filter media removes oil contaminants Anti-drain back valve helps ensure start-up lubrication and eliminates dry starts Heavy-duty electroplated housing helps prevent corrosion Easy-to-install screw-on style filter Mercury parts and accessories are backed by decades of experience in engineering, testing and manufacturing to provide the best fit, function and performance Thread Spec: 20mm x 1.5 Oil filter fits Mercury Marine 8/9.9 hp (323cc), 15/20 hp carbureted, and 25/30 hp EFI (MY2006 & Newer) outboard engines.