{"product_id":"sierra-18-7846-marine-fuel-filter-21-micron-replaces-omc-502905-omc-thread-omc-volvo-penta-fuel-systems","title":"Sierra 18-7846 Fuel Filter, OMC Thread, Replaces OMC 502905, 21 Micron, Universal Fit","description":"\u003cp\u003eThe Sierra 18-7846 is a 21 micron fuel filter built with an OMC-style thread to replace OMC 502905 filters on marine fuel systems that use that thread pattern. Rated for personal watercraft applications, it is designed as a universal-fit replacement, so it drops into the fuel line wherever an OMC thread fuel filter of this type is specified. The 21 micron rating traps fine contaminants and water before they reach the carburetor or fuel injectors, helping protect the engine from the debris and moisture that commonly accumulate in marine fuel tanks and lines. Sierra builds the 18-7846 to the same fit and function as the original OMC filter it replaces, giving boat owners a straightforward like-for-like swap during routine fuel system maintenance. As with all Sierra parts, the 18-7846 is backed by Sierra's standard customer satisfaction warranty, giving buyers confidence in fit and durability when replacing a worn or clogged fuel filter. It ships as a single filter unit, ready to install in place of the original OMC thread filter.\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 18-7846\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiltration Rating:\u003c\/strong\u003e 21 microns\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e OMC thread\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Pitch:\u003c\/strong\u003e 1 inch-12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit Type:\u003c\/strong\u003e Universal fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVehicle Service Type:\u003c\/strong\u003e Personal watercraft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.07 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e Limited warranty\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eThe 18-7846 is a universal-fit fuel filter designed for OMC thread fuel systems and personal watercraft fuel line applications.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 502905\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-7846 fuel filter replace?\u003c\/strong\u003e The Sierra 18-7846 replaces OMC 502905, using the same OMC thread pattern so it installs as a direct swap for that filter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat micron rating is the 18-7846 fuel filter?\u003c\/strong\u003e It is rated at 21 microns, which filters fine contaminants and moisture out of the fuel before it reaches the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the thread pitch on the Sierra 18-7846?\u003c\/strong\u003e The 18-7846 uses a 1 inch-12 thread pitch, matching the OMC thread style it is designed to replace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-7846 a universal fit filter?\u003c\/strong\u003e Yes, the Sierra 18-7846 is designed as a universal-fit fuel filter for fuel systems that use the OMC thread pattern, including personal watercraft applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-7846 fuel filter weigh?\u003c\/strong\u003e The Sierra 18-7846 weighs 1.07 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-7846 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-7846 is a Sierra-manufactured replacement filter engineered to match the fit and function of the original OMC 502905 filter it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes in the box with the 18-7846?\u003c\/strong\u003e Each order includes one Sierra 18-7846 fuel filter, sold as a single unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7846 filter come with a warranty?\u003c\/strong\u003e Yes, the Sierra 18-7846 is covered under Sierra's limited customer satisfaction warranty like all Sierra parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat kind of debris does the 18-7846 fuel filter protect against?\u003c\/strong\u003e At a 21 micron rating, the 18-7846 filters out fine sediment and water contamination that can otherwise reach the carburetor or fuel injectors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-7846 be used on personal watercraft?\u003c\/strong\u003e Yes, the Sierra 18-7846 is rated for personal watercraft fuel systems in addition to other applications using the OMC thread pattern.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if the 18-7846 is the correct filter for my boat?\u003c\/strong\u003e If your current fuel filter is an OMC 502905 or uses the same 1 inch-12 OMC thread pattern, the Sierra 18-7846 is the correct replacement.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988389310683,"sku":"SIE-18-7846","price":11.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__67318.1753840684.500.750.jpg?v=1785188059","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-7846-marine-fuel-filter-21-micron-replaces-omc-502905-omc-thread-omc-volvo-penta-fuel-systems","provider":"Good Vibes Marina","version":"1.0","type":"link"}