{"title":"Mercury 40-50-60 HP 300 Hour Kits","description":"","products":[{"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"},{"product_id":"mercury-40-50-60-efi-300-hour-service-kit-standard-gearcases-only-for-serial-numbers-1c453840-up-8m0113483","title":"Mercury – 300 Hour Maintenance Kit | FourStroke EFI Service | Complete OEM Components | 8M0113483","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury 40-60 HP – 300 Hour Maintenance Kit | FourStroke EFI Service | Complete OEM Components | 8M0113483\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\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 Any boater who \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eputs\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e real time on the water knows that a well-serviced engine changes everything. There’s a certain ease that settles in when you’ve taken care of your outboard — the throttle responds cleaner, the idle evens out, and your mind relaxes because you know the machine beneath you is ready for the next stretch of open water. The Mercury 8M0113483 300 Hour Maintenance Kit brings that kind of confidence back into your routine. It’s the sort of kit you keep on hand because you want your engine to feel as dependable on hour 300 as it did on hour three.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKey Features\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eComplete 300-hour service kit for Mercury 4-cylinder 40–60 horsepower FourStroke EFI \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eoutboards\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned for engines with standard gearcases, serial number 1C000001 and higher\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIncludes oil filter, low-pressure and high-pressure fuel filters, oil drain seal, gearcase seals, thermostat and gaskets, four spark plugs, water pump impeller kit, and anode set\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePremium filtration components built with high pleat counts and corrosion-resistant housings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eComponents match Mercury Marine original equipment standards for precision and \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003elongevity\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFits Mercury 4-cylinder FourStroke EFI outboards from 40 to 60 horsepower\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCompatible with standard gearcase models (serial 1C000001 and above)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCommon on fishing boats, pontoons, runabouts, utility skiffs, and small offshore hulls\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIdeal for owners who log substantial seasonal hours or operate in demanding environments\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e A full 300-hour service is more than just a checklist — it’s what keeps your engine running tight, smooth, and steady when you need it most. This kit brings together every high-wear and high-importance part in one place, saving you from parts-chasing or mismatched components. You’ll feel the benefit right away: cleaner starts, sharper throttle response, cooler running, and far fewer surprises when you push off from the dock.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThe new impeller restores strong, reliable cooling flow. Fresh spark plugs bring back crisp ignition. New filters protect your fuel system from the kind of debris that causes hesitation or rough running. And the new seals and anodes help your lower unit stay secure and corrosion-resistant, especially if you split your time between saltwater and freshwater. Each piece fits with the precision you expect from a Mercury Marine part, so installation feels straightforward rather than fussy.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhy Buy OEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e For a major service interval like this, the difference between genuine and aftermarket parts becomes very real. With OEM, you’re getting components designed specifically for your Mercury FourStroke EFI — correct dimensions, correct materials, and the confidence that everything works together exactly as the engineers intended. It’s a practical, long-view investment: far fewer complications, longer engine life, and better day-to-day performance. When you rely on your boat often, you’ll want the same reliability from the parts you put in it.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFAQ\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ1: Which engines does the Mercury 8M0113483 300 Hour Maintenance Kit fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits Mercury 4-cylinder 40–60 horsepower FourStroke EFI outboards with standard gearcases (serial 1C000001 and above).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: How is this different from aftermarket service kits?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e OEM kits use premium filtration, precise fitment, and Mercury-tested materials that hold up better over time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I confirm this is the correct kit for my outboard?\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 engine is a FourStroke EFI model within the 40–60 horsepower range.\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?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes — all components are designed for durability in any environment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is the installation manageable for most boat owners?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e If you’re comfortable doing routine maintenance, you’ll find the process straightforward with \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ecommon\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003etools\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":45626532528419,"sku":"8M0113483","price":283.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8M0113483_Main.jpg?v=1760631393"},{"product_id":"partsvu-lower-unit-gear-lube-oil-pump-f-standard-quart-bottles-fits-3-8-16-drain-plug-includes-8mm-adapter-pv1005051","title":"PartsVu - Lower Unit Gear Lube Oil Pump - f\/ Standard Quart Bottles - Fits 3\/8\" - 16 drain plug - Includes 8mm adapter - PV1005051","description":"\u003cp\u003e\u003cstrong\u003ePartsVu - Lower Unit Gear Lube Oil Pump  - f\/ Standard Quart Bottles - Fits 3\/8\" - 16 drain plug - Includes 8mm adapter - PV1005051 (gear lube sold separately)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA must have for every DIY mechanic, this versatile lower unit gear lube pump takes the guesswork out of the job. Simply drain the old gear oil, attach the pump, efficiently and effectively pump in the new oil, and get back out on the water for more boating fun!\u003c\/p\u003e\n\u003cp\u003eWith the included adapter, this pump will fit \u003cem\u003e\u003cstrong\u003emost \u003c\/strong\u003e\u003c\/em\u003eall outboards and sterndrives, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYamaha\u003c\/li\u003e\n\u003cli\u003eMercury \/ MerCruiser\u003c\/li\u003e\n\u003cli\u003eSuzuki\u003c\/li\u003e\n\u003cli\u003eTohatsu\u003c\/li\u003e\n\u003cli\u003eHonda\u003c\/li\u003e\n\u003cli\u003eJohnson \/ Evinrude\u003c\/li\u003e\n\u003cli\u003eOMC\u003c\/li\u003e\n\u003cli\u003eCobra\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost all outboards and sterndrives produced by US manufacturers will use the standard 3\/8\" fitting. \u003c\/p\u003e\n\u003cp\u003eMost all non-US outboard and sterndrives will require the 8mm adapter installed on top of the 3\/8\" fitting.\u003c\/p\u003e\n\u003cp\u003eThe pumps cap adapter fits all standard quart bottles with a 28mm or 1.125\" opening. \u003c\/p\u003e\n\u003cp\u003eA rubber cap is included to keep the pump clean in between uses.\u003c\/p\u003e","brand":"PartsVu","offers":[{"title":"Default Title","offer_id":46932990066979,"sku":"PV1005051","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/yamwpump.jpg?v=1698781778"},{"product_id":"mercury-40-50-60-complete-300-hour-service-maintenance-kit-10w-30-standard-gearcases-only-for-serial-numbers-1c453840-up-8m0113483","title":"Mercury 40\/50\/60 Complete 300 Hour Service Maintenance Kit 10W-30 - Standard Gearcases Only -  For Serial Numbers 1C453840 \u0026 Up - 8M0113483","description":"\u003cp\u003eWant to know more about how your engine is breaking-in or wearing? Curious about whether or not your oil is doing its job? Want to be ahead of problems that may develop? PartsVu has partnered with Blackstone Laboratories and we are now offering professional \u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca href=\"https:\/\/partsvu.com\/collections\/blackstone-laboratories\" style=\"color: rgb(43, 0, 255);\"\u003eoil analysis kits\u003c\/a\u003e\u003c\/span\u003e. Results are typically received in a few days via email. \u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca href=\"https:\/\/partsvu.com\/collections\/blackstone-laboratories\" style=\"color: rgb(43, 0, 255);\"\u003eShop now\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eMercury | 300 Hour Service Kit | 8M0113483\u003c\/h2\u003e\n\u003cp\u003eStay on schedule with a complete 300 hour service kit designed for Mercury 40, 50, and 60 HP four-stroke outboards equipped with \u003cstrong\u003estandard gearcases\u003c\/strong\u003e. Built around \u003cstrong\u003e10W-30 four-stroke oil\u003c\/strong\u003e, this kit includes the routine oil and gearcase service items along with the cooling, ignition, and corrosion components commonly replaced at the 300 hour interval. It is a convenient way to refresh critical systems and help maintain dependable performance season after season.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury 40\/50\/60 HP Four-Stroke – Standard Gearcases Only-8M0113483\u003c\/p\u003e\n\u003chr style=\"margin: 24px 0;\"\u003e\n\u003ch3\u003eWhat’s Included in This Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e 10W-30 Four-Stroke Engine Oil (Gallon)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Gear Lube (Quart)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Oil Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Low Pressure Fuel Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e High Pressure Fuel Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Oil Drain Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2x\u003c\/strong\u003e Gearcase Drain Seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Thermostat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermostat Gaskets\u003c\/strong\u003e (Included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4x\u003c\/strong\u003e Spark Plugs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Water Impeller Repair Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Power Trim Anode\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Lower Unit Anode\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003chr style=\"margin: 24px 0;\"\u003e\n\u003ch3\u003eWhy This 300 Hour Service Kit Matters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete milestone coverage:\u003c\/strong\u003e Addresses oil, gearcase, cooling, ignition, and fuel system wear items.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling system refresh:\u003c\/strong\u003e Thermostat and impeller service help maintain proper operating temperature.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel system protection:\u003c\/strong\u003e Replacing both low and high pressure fuel filters supports clean fuel delivery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion protection:\u003c\/strong\u003e Includes trim and lower unit anodes to help reduce galvanic corrosion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003chr style=\"margin: 24px 0;\"\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this kit fit Command Thrust or other specialty gearcases?\u003c\/strong\u003e\u003cbr\u003eNo. This kit is specifically for models equipped with standard gearcases only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are 2 gearcase drain seals included?\u003c\/strong\u003e\u003cbr\u003eMost gearcases use sealing washers at both the drain and vent screws. Replacing both helps ensure a proper seal after service.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy replace both fuel filters at 300 hours?\u003c\/strong\u003e\u003cbr\u003eFuel filters can accumulate debris and moisture over time. Replacing both supports consistent fuel pressure and engine performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat should I verify before ordering?\u003c\/strong\u003e\u003cbr\u003eConfirm your engine horsepower and that it is equipped with a standard gearcase.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":47125895577891,"sku":"PVM00082","price":351.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8m0113483_10w-30.jpg?v=1701377081"},{"product_id":"mercury-40-50-60-complete-300-hour-service-maintenance-kit-10w-30-synthetic-blend-standard-gearcases-only-for-serial-numbers-1c453840-up-8m0113483","title":"Mercury 40\/50\/60 Complete 300 Hour Service Maintenance Kit 10W-30 Synthetic Blend - Standard Gearcases Only - For Serial Numbers 1C453840 \u0026 Up - 8M0113483","description":"\u003cp\u003eWant to know more about how your engine is breaking-in or wearing? Curious about whether or not your oil is doing its job? Want to be ahead of problems that may develop? PartsVu has partnered with Blackstone Laboratories and we are now offering professional \u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca href=\"https:\/\/partsvu.com\/collections\/blackstone-laboratories\" style=\"color: rgb(43, 0, 255);\"\u003eoil analysis kits\u003c\/a\u003e.\u003c\/span\u003e Results are typically received in a few days via email. \u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca href=\"https:\/\/partsvu.com\/collections\/blackstone-laboratories\" style=\"color: rgb(43, 0, 255);\"\u003eShop now\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eMercury | 300 Hour Service Kit | 8M0113483\u003c\/h2\u003e\n\n\u003cp\u003eStay on schedule with a complete 300 hour service kit designed for Mercury 40, 50, and 60 HP four-stroke outboards equipped with \u003cstrong\u003estandard gearcases\u003c\/strong\u003e. Built around \u003cstrong\u003e10W-30 synthetic blend four-stroke oil\u003c\/strong\u003e, this kit combines routine oil-change and gearcase items with the additional wear parts commonly addressed at the 300 hour interval—fuel system filtration, cooling components, ignition parts, and corrosion protection. It is a simple way to refresh critical systems, reduce downtime, and keep your outboard running reliably for the next season of use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury 40\/50\/60 HP Four-Stroke – Standard Gearcases Only\u003c\/p\u003e\n\n\u003chr style=\"margin: 24px 0;\"\u003e\n\n\u003ch3\u003eWhat’s Included in This Kit\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e 10W-30 Synthetic Blend Four-Stroke Engine Oil (Gallon)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Gear Lube (Quart)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Oil Filter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Low Pressure Fuel Filter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e High Pressure Fuel Filter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Oil Drain Seal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2x\u003c\/strong\u003e Gearcase Drain Seals\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Thermostat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThermostat Gaskets\u003c\/strong\u003e (Included)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4x\u003c\/strong\u003e Spark Plugs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Water Impeller Repair Kit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Power Trim Anode\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1x\u003c\/strong\u003e Lower Unit Anode\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 24px 0;\"\u003e\n\n\u003ch3\u003eWhy This 300 Hour Service Kit Matters\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMilestone service coverage:\u003c\/strong\u003e Goes beyond oil and gear lube to address cooling, ignition, and fuel filtration wear items.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCooling system refresh:\u003c\/strong\u003e Thermostat and impeller components help support stable operating temperatures and reliable water flow.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuel-side protection:\u003c\/strong\u003e Fresh low and high pressure fuel filters help reduce debris before it reaches sensitive fuel system components.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrosion defense:\u003c\/strong\u003e Includes trim and lower unit anodes to help reduce galvanic corrosion in harsh marine conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 24px 0;\"\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this kit fit Command Thrust or other specialty gearcases?\u003c\/strong\u003e\u003cbr\u003e\nNo. This kit is intended for \u003cstrong\u003estandard gearcases only\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy are there 2 gearcase drain seals included?\u003c\/strong\u003e\u003cbr\u003e\nMany gearcases use sealing washers at both the drain and vent screws, so replacing them together helps support a proper seal.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy replace both fuel filters at 300 hours?\u003c\/strong\u003e\u003cbr\u003e\nFuel filters can load up over time. Replacing both helps support consistent fuel pressure, smooth running, and dependable starting.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat should I confirm before ordering?\u003c\/strong\u003e\u003cbr\u003e\nVerify your engine is a Mercury 40\/50\/60 HP four-stroke with a standard gearcase.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":47125895774499,"sku":"PVM00083","price":363.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8m0113483_10w-30s.jpg?v=1701377081"},{"product_id":"mercury-outboard-winterizing-kit","title":"Mercury Outboard Winterizing Kit","description":"\u003ch2\u003eMercury Outboard Winterizing Kit\u003c\/h2\u003e\n\u003cp\u003ePreparing your Mercury outboard for winter storage doesn’t have to be stressful. The Mercury Outboard Winterizing Kit includes the exact OEM products designed to keep your engine protected during the off-season. To ensure your outboard starts strong next season, it’s essential to address several key components. This includes stabilizing your fuel, coating internal parts, and lubricating high-wear areas. The kit provides flexible size options for fuel stabilizer and grease, and you can also choose to add dielectric grease for enhanced electrical protection. For a full walkthrough of the process, check out our \u003ca href=\"https:\/\/partsvu.com\/blogs\/boating-resources\/winterizing-outboard-motor-mercury-marine-essential-maintenance\" target=\"_blank\"\u003eMercury Winterizing Guide\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Stabilizer – Keeps gas fresh\u003c\/strong\u003e – \u003ca href=\"https:\/\/partsvu.com\/products\/mercury-quickstor-fuel-stabilizer-12-oz-92-8m0047932\" target=\"_blank\"\u003eMercury Quickstor Fuel Stabilizer – 12 oz.\u003c\/a\u003e or \u003ca href=\"https:\/\/partsvu.com\/products\/mercury-quickstor-fuel-stabilizer-32-oz-92-8m0058692\" target=\"_blank\"\u003e32 oz.\u003c\/a\u003e. Prevents phase separation, fights varnish deposits, and helps your engine start easily after months of storage. Perfect for both small tanks and larger multi-tank setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFogging Oil – Protects internal parts\u003c\/strong\u003e – \u003ca href=\"https:\/\/partsvu.com\/products\/mercury-storage-seal-fogging-oil-12-oz-92-858081k03\" target=\"_blank\"\u003eMercury Storage Seal Fogging Oil – 12 oz.\u003c\/a\u003e. Coats cylinders and injectors with a corrosion-resistant film to block moisture intrusion and keep metal surfaces from pitting. Essential for long-term engine protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrease – Fights wear and corrosion\u003c\/strong\u003e – \u003ca href=\"https:\/\/partsvu.com\/collections\/mercury-quicksilver-corrosion-inhibitors-grease\/products\/mercury-2-4-c-marine-grease-with-ptfe-8-oz-92-802859a1\" target=\"_blank\"\u003eMercury 2-4-C Marine Grease – 8 oz.\u003c\/a\u003e or \u003ca rel=\"noopener\" href=\"https:\/\/partsvu.com\/products\/mercury-greasex-14oz-92-8m0190472\" target=\"_blank\"\u003e14 oz. cartridge\u003c\/a\u003e. Specially formulated with PTFE to provide long-lasting lubrication for prop shafts, steering linkages, and fittings. Protects against saltwater intrusion and seizing.\u003c\/li\u003e\n\u003cli\u003eDielectric Grease (Optional) – Safeguards connections – \u003ca href=\"https:\/\/partsvu.com\/products\/permatex-dielectric-tune-up-grease-33-oz-81150\" target=\"_blank\"\u003ePermatex Dielectric Tune-Up Grease – .33 oz.\u003c\/a\u003e. A simple but effective way to keep plugs and terminals free of moisture and corrosion, reducing electrical issues.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM-approved products\u003c\/strong\u003e – Every item in this kit is Mercury-tested and formulated for outboard use, ensuring the right chemistry for your engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexibility in size\u003c\/strong\u003e – Choose the bottle or cartridge size that best fits your outboard and fuel system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplifies maintenance\u003c\/strong\u003e – Rather than sourcing items separately, this kit bundles together everything Mercury recommends for proper winterization.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine longevity\u003c\/strong\u003e – Using these products as directed reduces risk of costly repairs, extends engine life, and ensures smoother performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted by professionals\u003c\/strong\u003e – The same products marine techs rely on for seasonal prep, now packaged for DIY boaters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eStoring your boat for the off-season is about prevention. With the Mercury Outboard Winterizing Kit, you effectively protect every essential system — fuel, internal components, moving parts, and electrical systems. It's a wise investment that ensures your outboard remains reliable, efficient, and ready for spring launch.\u003c\/p\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this kit compatible with outboards that are not made by Mercury?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: While designed for Mercury, the stabilizer, fogging oil, and grease are high-quality marine-grade products that can be used across most brands. For best results, stick with OEM for your engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need the larger sizes of stabilizer or grease?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Not necessarily. The 32 oz. stabilizer and 14 oz. grease cartridge are best for larger tanks or frequent service work. When it comes to single-outboard setups, smaller sizes often do the trick! They pack a punch while keeping things sleek and efficient.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is winterization really necessary if I only store my boat for a couple of months?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. Even short storage periods can lead to stale fuel, internal corrosion, and seized fittings. A proper winterization routine ensures your engine is protected regardless of downtime.\u003c\/p\u003e","brand":"PartsVu","offers":[{"title":"12 oz. \/ 12 oz. \/ 8 oz. Mercury Grease","offer_id":54304344834339,"sku":"C-PVMP-05442","price":43.97,"currency_code":"USD","in_stock":true},{"title":"12 oz. \/ 12 oz. \/ 8 oz. Mercury Grease + Dielectric Grease (Optional)","offer_id":54304344867107,"sku":"C-PVMP-05443","price":51.09,"currency_code":"USD","in_stock":true},{"title":"12 oz. \/ 12 oz. \/ 14 oz. Mercury Grease","offer_id":54304344899875,"sku":"C-PVMP-05444","price":46.97,"currency_code":"USD","in_stock":true},{"title":"12 oz. \/ 12 oz. \/ 14 oz. Mercury Grease + Dielectric Grease (Optional)","offer_id":54304344932643,"sku":"C-PVMP-05445","price":54.09,"currency_code":"USD","in_stock":true},{"title":"32 oz. \/ 12 oz. \/ 8 oz. Mercury Grease","offer_id":54304344965411,"sku":"C-PVMP-05446","price":55.56,"currency_code":"USD","in_stock":true},{"title":"32 oz. \/ 12 oz. \/ 8 oz. Mercury Grease + Dielectric Grease (Optional)","offer_id":54304344998179,"sku":"C-PVMP-05447","price":62.68,"currency_code":"USD","in_stock":true},{"title":"32 oz. \/ 12 oz. \/ 14 oz. Mercury Grease","offer_id":54304345030947,"sku":"C-PVMP-05448","price":58.56,"currency_code":"USD","in_stock":true},{"title":"32 oz. \/ 12 oz. \/ 14 oz. Mercury Grease + Dielectric Grease (Optional)","offer_id":54304345063715,"sku":"C-PVMP-05449","price":65.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/C-PVMP-05442.jpg?v=1756846488"}],"url":"https:\/\/partsvu.com\/en-mx\/collections\/mercury-40-50-60-hp-300-hour-kits-1.oembed","provider":"PartsVu","version":"1.0","type":"link"}