{"product_id":"sierra-18-7852-marine-fuel-water-separator-available-as-complete-kit-or-filter-with-bonus-pack","title":"Sierra Fuel Water Separator Filter Kit - Available as Standard Kit or Filter with Bonus Pack","description":"\u003cp\u003eThe Sierra 18-7852 Fuel Water Separator Kit protects marine fuel systems by removing over 99.8% of emulsified water from gasoline before it reaches your engine. Rated at 21 microns and flowing up to 90 GPH, it is built to feed even high-demand motors while guarding sensitive inboard, sterndrive, and outboard fuel injection systems against water contamination and the corrosion, hesitation, and injector damage it can cause.\u003c\/p\u003e\u003cp\u003eEach kit centers on a 1\/4\" filter element and includes the mounting hardware needed to add a water-separating stage to your fuel line. The Standard Kit pairs the filter with an 18-7853-1 mounting bracket for a straightforward installation, while the Filter with Bonus Pack version bundles in an 18-4256 pipe plug for a more complete setup. Both configurations use the same 18-7845 fuel filter element as the serviceable replacement cartridge going forward.\u003c\/p\u003e\u003cp\u003eThis kit is a Sierra-branded part built to OEM-equivalent specifications, making it a straightforward swap for factory-installed separators on compatible Mercury and Yamaha powered boats.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-7852\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiltration Rating:\u003c\/strong\u003e 21 Micron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Size:\u003c\/strong\u003e 1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Rate:\u003c\/strong\u003e 90 GPH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Removal Efficiency:\u003c\/strong\u003e Removes over 99.8% of emulsified water from gasoline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing Material:\u003c\/strong\u003e Aluminum (Standard Kit); Stainless Steel (Filter with Bonus Pack)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.32 pounds (Standard Kit); 1 pound (Filter with Bonus Pack)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e 18-7845 fuel filter and 18-7853-1 mounting bracket (Standard Kit); adds an 18-4256 pipe plug (Filter with Bonus Pack)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e Mercury Marine 35-807172A4, 35-60494A4, 35-805369A4, 35-57250A1, 35-55501A1, 35-52456A1, 35-60494A1, 52444 (Standard Kit); Yamaha MAR-SEPAR-AT-OR (Filter with Bonus Pack)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Inboard, sterndrive, and outboard fuel injection systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSizes \u0026amp; Options\u003c\/h3\u003e\u003cp\u003eThis kit is offered in two configurations under the same 18-7852 part family. Choose the Standard Kit if you need the core filter and mounting bracket for a new installation or bracket replacement. Choose the Filter with Bonus Pack version if you also need a pipe plug on hand for the install. Both use the same 1\/4\", 21 micron filter element.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-7852 fuel water separator kit do?\u003c\/strong\u003e It removes over 99.8% of emulsified water from gasoline before it reaches the engine, protecting inboard, sterndrive, and outboard fuel injection systems from water contamination. The Sierra 18-7852 kit is rated at 21 microns and flows at up to 90 GPH.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the Standard Kit and the Filter with Bonus Pack version?\u003c\/strong\u003e Both use the same 1\/4\", 21 micron filter and 18-7853-1 mounting bracket, but the Filter with Bonus Pack version of the 18-7852 kit also includes an 18-4256 pipe plug for a more complete installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size filter does this kit use?\u003c\/strong\u003e The Sierra 18-7852 kit uses a 1\/4\" filter element rated at 21 microns in both the Standard Kit and Filter with Bonus Pack configurations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the box?\u003c\/strong\u003e The Standard Kit includes an 18-7845 fuel filter and an 18-7853-1 mounting bracket. The Filter with Bonus Pack version includes those same two parts plus an 18-4256 pipe plug.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this compatible with Mercury or Yamaha engines?\u003c\/strong\u003e The Standard Kit cross-references to Mercury Marine numbers 35-807172A4, 35-60494A4, 35-805369A4, 35-57250A1, 35-55501A1, 35-52456A1, 35-60494A1, and 52444. The Filter with Bonus Pack version cross-references to Yamaha MAR-SEPAR-AT-OR.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know which variant to order?\u003c\/strong\u003e Order the Standard Kit if you only need the filter and mounting bracket, or the Filter with Bonus Pack version of the 18-7852 if you also want an 18-4256 pipe plug included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the housing made of?\u003c\/strong\u003e The Standard Kit uses an aluminum housing, while the Filter with Bonus Pack version is listed with a stainless steel outer housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat flow rate does the 18-7852 filter support?\u003c\/strong\u003e It supports a flow rate of up to 90 GPH, which is sized to feed high-demand marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this filter work with fuel-injected engines?\u003c\/strong\u003e Yes, the Sierra 18-7852 is designed to prevent water damage to sensitive inboard, sterndrive, and outboard fuel injection systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part?\u003c\/strong\u003e Yes, this is a genuine Sierra 18-7852 fuel water separator kit manufactured to OEM-equivalent specifications, not a generic aftermarket copy.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does each version weigh?\u003c\/strong\u003e The Standard Kit weighs 0.32 pounds and the Filter with Bonus Pack version weighs 1 pound.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Kit","offer_id":48988054257883,"sku":"SIE-18-7852-1","price":43.06,"currency_code":"USD","in_stock":true},{"title":"Filter with Bonus Pack","offer_id":48988054290651,"sku":"SIE-18-7852-2","price":51.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-7852-2_lg__08371.1558132578.500.750.jpg?v=1785188922","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-7852-marine-fuel-water-separator-available-as-complete-kit-or-filter-with-bonus-pack","provider":"Good Vibes Marina","version":"1.0","type":"link"}