{"product_id":"sierra-international-18-7844-fuel-filter-21-micron-mercury-marine-replacement","title":"Sierra International 18-7844 Fuel Filter – 21 Micron Mercury Marine Replacement","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMeet the Sierra 18-7844 fuel filter, a compact Mercury Marine replacement engineered for reliable filtration and steady fuel flow. With a 21 micron rating, it targets fine particulates while supporting demanding engines. It replaces Mercury Marine parts 35-807172 and 35-802893Q, offering an OEM-equivalent fit for peace of mind on the water.\u003c\/p\u003e\n\n\u003ch3\u003ePerformance and filtration\u003c\/h3\u003e\n\u003cp\u003eEthanol blended fuels can carry more water and particulates. This filter is built to manage that reality without compromising fuel delivery. Designed to feed even higher-demand motors, the 90 GPH flow rating helps keep fuel moving consistently.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e90 GPH flow supports steady fuel supply for many boats\u003c\/li\u003e\n  \u003cli\u003e21 micron rating captures small particulates\u003c\/li\u003e\n  \u003cli\u003eHandles ethanol blended fuels that may carry more water\u003c\/li\u003e\n  \u003cli\u003eThread pitch 42690 ensures secure installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility and installation\u003c\/h3\u003e\n\u003cp\u003eThese specs reflect a short filter form that fits compatible housings. Short length is approximately 3.875 inches, making installation straightforward in compact setups.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplaces Mercury Marine part numbers 35-807172 and 35-802893Q\u003c\/li\u003e\n  \u003cli\u003eOEM origin: Mercury Marine 35-807172\u003c\/li\u003e\n  \u003cli\u003eShort length about 3.875 inches\u003c\/li\u003e\n  \u003cli\u003eThread pitch 42690 for proper fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy choose Sierra\u003c\/h3\u003e\n\u003cp\u003eSierra offers OEM-equivalent filtration parts designed for longevity and reliable filtration performance. This model supports clean fuel paths, helping to minimize clog risk and maintain smooth operation under typical boating conditions. Use as part of regular maintenance to keep fuel systems in good shape.\u003c\/p\u003e\n\n\u003cp\u003eNote: Benefits described reflect the filter's design attributes and compatibility. Real-world results depend on engine condition, fuel quality, and maintenance practices.\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 the Sierra 18-7844 a Mercury Marine replacement?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it replaces Mercury Marine parts 35-807172 and 35-802893Q and features a 21 micron rating.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What performance can I expect from this filter?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The filter supports up to 90 GPH flow and helps reduce particulates in ethanol blended fuel for smoother operation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":42465584480341,"sku":"B0001CLG2S","price":29.07,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/sierra-18-7844-fuel-filter-top-view.jpg?v=1778012890","url":"https:\/\/plentytorque.co.uk\/products\/sierra-international-18-7844-fuel-filter-21-micron-mercury-marine-replacement","provider":"PlentyTorque","version":"1.0","type":"link"}