{"product_id":"mercury-40-50-60-hp-efi-four-stroke-300-hour-service-kit-bigfoot-ct-gearcases-only-8m0090559","title":"Mercury – 300-Hour Maintenance Kit | 40–60HP FourStroke EFI Command Thrust | OEM Service Components | 8M0090559","description":"\u003ch2\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury – 300-Hour Maintenance Kit | 40–60HP FourStroke EFI Command Thrust | OEM Service Components | 8M0090559\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOverview\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMost boaters can tell you exactly where they were the first time their engine reminded them that maintenance matters. Maybe it was a sluggish start on a warm morning or a rough idle as you eased into the no-wake zone. Moments like that make you appreciate the value of doing things right — and doing them on time. The Mercury 8M0090559 300-Hour Maintenance Kit gives you everything you need to keep your 40–60 horsepower FourStroke EFI running smooth, steady, and ready for whatever water you love. It’s that sense of peace knowing your next season starts with fresh parts, clean filters, and the confidence that your engine is truly cared for.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eComplete 300-hour service kit for Mercury four-cylinder 40–60HP FourStroke EFI outboards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned for BigFoot and Command Thrust gearcases (serial number 1C000001 and up)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIncludes oil filter, low- and high-pressure fuel filters, oil drain seal, gearcase seals, thermostat and gaskets, four spark plugs, water impeller kit, and anodes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePremium filters built with high pleat counts for superior fuel and oil filtration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eHeavy-duty electroplated housings help resist corrosion in harsh marine environments\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eProvides all essential wear-item replacements in one convenient package\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFits Mercury 40–60 horsepower FourStroke EFI outboards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCompatible with BigFoot and Command Thrust gearcases\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIdeal for pontoons, bay boats, aluminum fishing rigs, skiffs, runabouts, and general-use family boats\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSuited for engines with serial numbers 1C000001 and above\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eA proper 300-hour service can make your engine feel almost new again. The filters restore crisp fuel delivery and clean oil flow, helping the outboard run smoother and respond faster when you throttle up. The spark plugs provide strong, consistent ignition you can feel in every shift and every acceleration. And replacing the impeller — something many boaters forget until it’s too late — ensures your cooling system stays strong, steady, and dependable.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThe kit also includes fresh anodes to help protect critical metal components, especially if you spend any time in brackish or saltwater. The thermostat and seals tighten everything back up, giving you that “secure” feeling when the engine reaches its operating temperature and stays there without drifting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhat makes this kit truly practical is the simplicity. Everything you need is in the box — you don’t have to hunt down part numbers, guess which filter your serial range uses, or worry about missing pieces. It’s a streamlined way to take care of your engine yourself or provide your technician with exactly what they need.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhy Buy OEM\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMaintenance is only as good as the parts you use. With genuine Mercury Marine components, you’re installing parts engineered specifically for your outboard — not something generic that “should fit.” OEM filters trap finer particles, OEM impellers last longer under heat and load, and OEM anodes protect the metal your engine depends on. Over time, that adds up to fewer breakdowns, better fuel economy, and a motor that feels tight and confident every time you start it. When you’re doing a major service interval like this one, using the real thing just makes sense.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFAQ\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ1: Which engines does the 8M0090559 Maintenance Kit fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits Mercury 40–60 horsepower FourStroke EFI outboards with BigFoot or Command Thrust gearcases, serial number 1C000001 and newer.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: What makes this kit better than buying parts individually?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Everything is OEM, perfectly matched to your engine, and bundled so you don’t miss any critical service components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I know if this is the right kit for my engine?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Check your serial number and verify that your outboard is a 40-60HP FourStroke EFI with BigFoot or Command Thrust gearing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Can this kit be used in both saltwater and freshwater setups?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes — all components are built to withstand corrosion and moisture common to both environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is installation straightforward?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Most experienced boaters or trained technicians can complete the service easily with standard tools and your owner’s manual.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":45626525352227,"sku":"8M0090559","price":212.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8M0090559_Main.jpg?v=1760631372","url":"https:\/\/partsvu.com\/en-au\/products\/mercury-40-50-60-hp-efi-four-stroke-300-hour-service-kit-bigfoot-ct-gearcases-only-8m0090559","provider":"PartsVu","version":"1.0","type":"link"}