{"product_id":"sierra-18-7989-fuel-water-separator-filter-10-micron-replaces-volvo-penta-3852413-fits-volvo-sx-efi-omc-cobra-efi","title":"Sierra Fuel Water Separator Filter 18-7989, 10 Micron Cobra EFI, Replaces OMC 502906","description":"\u003cp\u003eThe Sierra 18-7989 is a 10 micron fuel water separator filter built for Cobra EFI fuel systems. It is designed as a direct replacement for OMC 502906, giving boat owners a straightforward way to keep water and contaminants out of the fuel system without altering the original fuel line setup. The filter media rates at 10 microns, providing a finer level of filtration suited to electronic fuel injection systems that are more sensitive to contamination than carbureted engines.\u003c\/p\u003e\u003cp\u003eThe housing uses a plastic outer material and connects via a 13\/16-18 thread pitch, matching the OMC Cobra EFI mounting configuration. As a spin-on style filter, it is intended to be threaded onto the existing filter head or bracket and replaced as part of routine fuel system maintenance. Keeping this filter fresh helps protect fuel injectors and other EFI components from water intrusion and particulate damage, which is especially important in marine environments where condensation and fuel quality issues are common.\u003c\/p\u003e\u003cp\u003eEvery Sierra part is backed by the company's standard customer satisfaction warranty, so buyers replacing a Cobra EFI fuel filter can install the 18-7989 with confidence that it matches OEM specifications for fit and filtration performance.\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 18-7989\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicron Rating:\u003c\/strong\u003e 10 Micron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Type:\u003c\/strong\u003e Cobra EFI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Pitch:\u003c\/strong\u003e 13\/16-18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Material:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.69 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e OMC 502906\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282201883\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits OMC Cobra EFI fuel systems using the 502906 style fuel water separator filter.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 502906\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-7989 replace?\u003c\/strong\u003e The Sierra 18-7989 is a direct replacement for OMC 502906, the original fuel water separator filter used on OMC Cobra EFI fuel systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat micron rating is this filter?\u003c\/strong\u003e It is rated at 10 microns, which is the standard filtration level for the Cobra EFI version of this Sierra fuel water separator filter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread size does the 18-7989 use?\u003c\/strong\u003e This filter has a 13\/16-18 thread pitch, matching the mounting thread used on OMC Cobra EFI filter heads.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-7989 an OEM or aftermarket part?\u003c\/strong\u003e The 18-7989 is a Sierra-manufactured replacement filter engineered to match the fit and filtration performance of OEM part OMC 502906.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the filter housing made of?\u003c\/strong\u003e The outer housing of the Sierra 18-7989 fuel water separator filter is made of plastic.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this filter weigh?\u003c\/strong\u003e The Sierra 18-7989 fuel water separator filter weighs 0.69 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this filter fit a standard fuel filter thread instead of the Cobra EFI version?\u003c\/strong\u003e No, the 18-7989 is built specifically for the Cobra EFI thread configuration; Sierra offers separate part numbers, such as 18-7946, for OMC thread applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7989 come with a warranty?\u003c\/strong\u003e Yes, the Sierra 18-7989 is covered under Sierra's standard customer satisfaction warranty like all Sierra parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-7989?\u003c\/strong\u003e Ordering the 18-7989 includes one Sierra fuel water separator filter designed for Cobra EFI systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the 21 micron version different from the 18-7989?\u003c\/strong\u003e The 18-7989 is the 10 micron Cobra EFI filter, while the 21 micron equivalent for the same Cobra EFI application is a different Sierra part number with coarser filtration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does fuel filtration matter on an EFI system?\u003c\/strong\u003e Electronic fuel injection systems like those served by the 18-7989 are more sensitive to water and debris than carbureted engines, so a properly rated 10 micron filter helps protect injectors from contamination.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988427288795,"sku":"SIE-18-7989","price":8.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/90__28590.1753840685.500.750.jpg?v=1785188121","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-7989-fuel-water-separator-filter-10-micron-replaces-volvo-penta-3852413-fits-volvo-sx-efi-omc-cobra-efi","provider":"Good Vibes Marina","version":"1.0","type":"link"}