{"product_id":"sierra-fuel-filter-18-7845-long-21-micron-marine-cartridge-90-gph-flow-oem-fit-for-mercury-yamaha","title":"Sierra Fuel Filter 18-7845 Long 21-Micron Marine Cartridge — 90 GPH Flow, OEM Fit for Mercury\/Yamaha","description":"\u003cp\u003e\u003cstrong\u003eThe Sierra International 18-7845 medium fuel filter is a long, 21-micron replacement filter designed to protect outboard engines by removing fine particulates and water from ethanol-blended gasoline.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis fuel filter cartridge fits a range of marine applications and is built to the same fit-and-function specs as the OEM units it replaces. It maintains a 90 gallons-per-hour flow rate to supply even high-demand motors while trapping contaminants that can shorten engine life. The 18-7845 is compatible with specified Mercury and Yamaha part numbers, making it an easy swap for routine maintenance or emergency repairs.\u003c\/p\u003e\n\n\u003ch3\u003eWill this filter fit my Mercury or Yamaha outboard?\u003c\/h3\u003e\n\u003cp\u003eIf your engine lists Mercury part 35-802893Q or Yamaha part ABB-FUELF-IL-TR, the Sierra 18-7845 is a direct replacement engineered to match the original dimensions and thread pitch. Check your current filter length and thread size to confirm compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOEM equivalents: Mercury 35-802893Q, Yamaha ABB-FUELF-IL-TR\u003c\/li\u003e\n  \u003cli\u003eFilter length: long — 435\" (1105 mm) for compatible housings\u003c\/li\u003e\n  \u003cli\u003eThread pitch: 42690 to match factory fittings\u003c\/li\u003e\n  \u003cli\u003eSimple swap-in installation for same-model housings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the 21-micron rating protect my engine?\u003c\/h3\u003e\n\u003cp\u003eA 21-micron rating captures smaller particles that can accelerate wear in fuel systems while still allowing high fuel flow. It balances filtration efficiency with the need for sufficient volume to feed aggressive fuel demands without starving the engine.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTraps fine particulates down to 21 microns\u003c\/li\u003e\n  \u003cli\u003eMaintains 90 GPH flow to support high-consumption engines\u003c\/li\u003e\n  \u003cli\u003eReduces sediment and debris reaching injectors and pumps\u003c\/li\u003e\n  \u003cli\u003eHelps manage contaminants from ethanol-blended fuels\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat features help with ethanol-blended fuels and water?\u003c\/h3\u003e\n\u003cp\u003eSierra designed this filter with the realities of modern gasoline in mind: ethanol attracts water and loosens deposits. The media and construction reduce the risk of water and particulate contamination reaching critical engine components, improving reliability between services.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMedia optimized for ethanol-blend contamination control\u003c\/li\u003e\n  \u003cli\u003eConstruction assists in separating water and particulates\u003c\/li\u003e\n  \u003cli\u003eHelps prevent injector and fuel-pump damage from debris\u003c\/li\u003e\n  \u003cli\u003eRecommended for regular replacement as part of maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I know when to replace this filter?\u003c\/h3\u003e\n\u003cp\u003eReplace the filter according to your engine manufacturer’s maintenance schedule or when you notice performance issues like rough idling, hard starting, or fuel starvation. Visual checks for water or heavy sediment in the filter bowl and scheduled interval replacements are standard best practices.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFollow engine maker replacement intervals for best results\u003c\/li\u003e\n  \u003cli\u003eReplace sooner if fuel system problems or contaminated fuel are suspected\u003c\/li\u003e\n  \u003cli\u003eInspect filter bowl for visible water or debris regularly\u003c\/li\u003e\n  \u003cli\u003eKeep a spare on board for quick swap-outs during trips\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Sierra International 18-7845 suits boat owners and marine technicians who need a reliable, long-length medium filter that matches Mercury and Yamaha OEM specs. It’s ideal for users running ethanol-blended fuels, high-horsepower outboards, or anyone who wants a high-flow, 21-micron filtration option for routine maintenance and emergency replacements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eKey specifications summary:\u003c\/em\u003e 21-micron rating, 90 GPH flow, long filter size 435\" (1105 mm), thread pitch 42690, OEM cross-references Mercury 35-802893Q and Yamaha ABB-FUELF-IL-TR.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this filter a direct replacement for Mercury 35-802893Q?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The Sierra 18-7845 is built to match Mercury 35-802893Q dimensions and thread pitch for direct replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the filter handle ethanol-blended gasoline?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The media is optimized to manage water and loosened particulates common to ethanol-blended fuels.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":67595579293881,"sku":"B0009TO4FE","price":63.11,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/sierra-18-7845-front-packaging.jpg?v=1790589991","url":"https:\/\/redleafauto.ca\/products\/sierra-fuel-filter-18-7845-long-21-micron-marine-cartridge-90-gph-flow-oem-fit-for-mercury-yamaha","provider":"Redleaf Auto","version":"1.0","type":"link"}