Sierra 18-7911-1 Oil Filter for Yamaha and Honda Outboards Sierra canister fuel filters are designed to be an exact fit and performance replacement to your current OEM filter. These filters are fire tested to meet ISO and USCG requirements. Sierra recommends replacing your fuel filter every 50 hours of operation, or at a minimum of once per year preferably at winterization. Engineered with premium grade materials that will excel in the extreme marine environment Epoxy coated for corrosion resist