{"product_id":"sierra-18-7902-4-cycle-outboard-oil-filter","title":"Sierra 18-7902 4-Cycle Outboard Oil Filter – Yamaha F15–F100 4-Stroke","description":"\u003csection class=\"product-description\"\u003e\n\n\u003ch2\u003eSierra 18-7902 4-Cycle Outboard Oil Filter – Yamaha F15–F100 4-Stroke\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 18-7902  |  \u003cstrong\u003eSKU:\u003c\/strong\u003e 47-7902  |  \u003cstrong\u003eUPC:\u003c\/strong\u003e 808282244873\u003c\/p\u003e\n\n\u003cp\u003eThe Sierra 18-7902 is a spin-on oil filter for selected Yamaha 4-stroke outboard engines, covering a broad range of F-series and T-series applications from the mid-1990s through the early 2000s. It uses a 20 mm x 1.5 thread, heavy-wall steel canister with epoxy corrosion protection, high-efficiency filter media, and an anti-drain-back valve that helps retain oil in the filter during shutdown and reduce dry-start conditions on startup.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThread: 20 mm x 1.5\u003c\/li\u003e\n\u003cli\u003eFilter type: 4-cycle outboard spin-on oil filter\u003c\/li\u003e\n\u003cli\u003eAnti-drain-back valve: Yes\u003c\/li\u003e\n\u003cli\u003eCanister: Heavy-wall epoxy-coated steel\u003c\/li\u003e\n\u003cli\u003eFilter media: High-efficiency, meets or exceeds OEM specification\u003c\/li\u003e\n\u003cli\u003eMarine-duty construction for freshwater and saltwater environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eYamaha F15 4-stroke outboards (selected model years — verify by serial number)\u003c\/li\u003e\n\u003cli\u003eYamaha F25 4-stroke outboards (selected model years — verify by serial number)\u003c\/li\u003e\n\u003cli\u003eYamaha F40 4-stroke outboards (selected model years — verify by serial number)\u003c\/li\u003e\n\u003cli\u003eYamaha F50 4-stroke outboards (selected model years — verify by serial number)\u003c\/li\u003e\n\u003cli\u003eYamaha T50 4-stroke outboards (selected model years — verify by serial number)\u003c\/li\u003e\n\u003cli\u003eYamaha F80 4-stroke outboards (selected model years — verify by serial number)\u003c\/li\u003e\n\u003cli\u003eYamaha F100 4-stroke outboards (selected model years — verify by serial number)\u003c\/li\u003e\n\u003cli\u003eOther Yamaha 4-stroke outboards specifying a 3FV-13440-series or JE8-13440-series filter number\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFitment Note:\u003c\/strong\u003e Coverage spans primarily mid-1990s through early-2000s production, depending on model and horsepower. Always confirm your Yamaha model, model year, and existing OEM filter number before ordering. The 20 mm x 1.5 thread and 3FV-13440-series cross-reference are the most reliable fitment identifiers.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eService Interval\u003c\/h2\u003e\n\u003cp\u003eReplace at every scheduled engine oil service. Follow Yamaha’s recommended service interval for your specific outboard model — typically every 100 hours or once per season, whichever comes first. Refer to your Yamaha owner’s or service manual for guidance.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRemove the old filter and confirm the old gasket has come away with it — a retained gasket will cause an oil leak\u003c\/li\u003e\n\u003cli\u003eClean the filter mounting surface\u003c\/li\u003e\n\u003cli\u003eLightly coat the new filter gasket with fresh engine oil before threading it on\u003c\/li\u003e\n\u003cli\u003eTighten by hand plus ¾ turn, or per Yamaha service specification — do not over-tighten\u003c\/li\u003e\n\u003cli\u003eRun the engine and inspect for leaks before returning to service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOEM \u0026amp; Cross-Reference Part Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSierra:\u003c\/strong\u003e 18-7902\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha:\u003c\/strong\u003e 3FV-13440-00-00, 3FV-13440-10-00, 3FV-13440-20-00, 3FV-13440-30-00, JE8-13440-00-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuicksilver \/ Mercury:\u003c\/strong\u003e 8M0154774\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMallory:\u003c\/strong\u003e 9-57809\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFram:\u003c\/strong\u003e PH6017A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWix:\u003c\/strong\u003e 51358\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRelated Products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachoice-50-21018-full-flow-oil-filter-20-micron\"\u003eSeachoice 50-21018 Full-Flow Oil Filter – 20 Micron\u003c\/a\u003e — value alternative for Yamaha 3FV\/3FC-series 4-stroke outboards\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/sierra-18-7901-4-cycle-outboard-oil-filter\"\u003eSierra 18-7901 4-Cycle Outboard Oil Filter – Mercury\/Mariner \u0026amp; Yamaha 8–9.9 HP\u003c\/a\u003e — Sierra filter for smaller Yamaha and Mercury 4-stroke outboards\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/sierra-7914-4-cycle-outboard-oil-filter\"\u003eSierra 7914 4-Cycle Outboard Oil Filter\u003c\/a\u003e — Sierra filter for Mercury 4-stroke outboards\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachoice-50-21004-full-flow-oil-filter-20-micron\"\u003eSeachoice 50-21004 Full-Flow Oil Filter – 20 Micron\u003c\/a\u003e — Mercury \u0026amp; Mariner 4-stroke outboard filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest Use Case:\u003c\/strong\u003e Routine oil and filter changes on a wide range of Yamaha F-series and T-series 4-stroke outboards in the 15–100 HP range, covering mid-1990s through early-2000s production. The 3FV-13440 series is one of Yamaha’s most widely used oil filter references across this era, making the 18-7902 a high-frequency service item for shops carrying Yamaha parts and for customers maintaining older Yamaha 4-stroke outboards.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Issues:\u003c\/strong\u003e Yamaha uses multiple 20 mm x 1.5 oil filter references across their 4-stroke outboard lineup, and some look similar to this one. The safest fitment confirmation is matching one of the Yamaha 3FV-13440-series or JE8-13440-00-00 numbers against the filter currently on the engine. As with all spin-on filters, remind customers to verify the old gasket comes off with the old filter before installing the new one.\u003c\/p\u003e\n\n\u003c\/section\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199650562084,"sku":"47-7902","price":19.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-7902.jpg?v=1785611162","url":"https:\/\/marisolmarine.com\/products\/sierra-18-7902-4-cycle-outboard-oil-filter","provider":"Marisol Marine Company","version":"1.0","type":"link"}