{"product_id":"mercury-15-20-hp-300-hour-service-kit-8m0120838-s-n-0r235949-0r833819","title":"Mercury – 300 Hour Maintenance Kit | FourStroke Service Package | Complete Engine Care Components | 8M0120838","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury 15-20 HP EFI – 300 Hour Maintenance Kit | FourStroke Service Package | Complete Engine Care Components | 8M0120838\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOverview\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIf you run a 15–20 horsepower Mercury FourStroke, you already know what these little engines are capable of. They’re the quiet, steady companions that get you out before sunrise, push you upriver when the wind turns stubborn, and carry you home after a long day on the flats. Hitting the 300-hour mark is more than just a maintenance interval—it’s a milestone that shows just how much time you’ve spent on the water.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThe Mercury 8M0120838 300 Hour Maintenance Kit is built for boaters who’d rather do the job once and do it right. Everything you need for a full, no-compromises service comes neatly organized in one box. No tracking down part numbers, no second-guessing whether the filter is the right one. Just a complete kit engineered to renew the heart of your outboard so it keeps running tight, smooth, and steady for another season.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKey Features\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFull 300-hour maintenance kit for select Mercury 15–20hp FourStroke engines.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIncludes oil filter, fuel filter, spark plugs (three), thermostat and gaskets, oil drain seal, gearcase seals, water pump impeller kit, and unit anode.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eHigh-pleat fuel and oil filters provide exceptional filtration and long service life.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eHeavy-duty electroplated housings deliver superior corrosion resistance.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eComponents are engineered to Mercury Marine specifications for precise fit and performance.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eComplements Mercury 4-Stroke Marine Engine Oil and Premium Gear Lube (sold separately).\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFits Mercury 15–20hp FourStroke outboards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWorks with engines from serial number 0R235168 through 0R833819\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIdeal for jon boats, utility skiffs, aluminum fishing boats, inflatables, and tenders\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eS\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003euitable for freshwater and coastal environments\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOnce you install the parts in this kit, the difference isn’t subtle—you hear it, you feel it, and you trust it. New spark plugs help the engine light off quickly and idle with a calm, even rhythm. Fresh filters keep fuel and oil clean, giving you smoother throttle response and better long-term reliability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eTh\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ee replacement impeller is one of the biggest upgrades. A crisp, healthy water pump keeps temperatures consistent, even on long upruns or when the current forces the engine to work harder. Updated seals tighten up the gearcase, reducing the chance of water intrusion and helping everything inside live longer.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhen your outboard runs cooler, breathes cleaner, and fires instantly, you spend less time worrying and more time enjoying the water. That’s the real purpose of this kit—restoring confidence in the machine that carries you day after day.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhy Buy OEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eGenuine Mercury quality ensures reliable, repeatable performance.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eParts fit the first time without improvising or modifying.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eLonger service life compared to many aftermarket components.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned and tested specifically for Mercury FourStroke platforms.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eProtects your investment by maintaining factory-grade reliability.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eAsk any seasoned boater: when it comes to maintenance, OEM parts simply last longer and keep your engine behaving the way Mercury designed it to.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFAQ\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ1: Which engines does the 8M0120838 kit fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits Mercury 15–20hp FourStroke outboards within serial numbers 0R235168–0R833819.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: What makes this different from aftermarket service kits?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e You get Mercury-engineered components with superior filtration, sealing, and durability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I confirm this is the right kit for my outboard?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Match your engine’s serial number to the supported range listed above.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Can I use this kit in freshwater and saltwater environments?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Absolutely—every part is designed to handle harsh marine conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is the 300-hour service 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 standard maintenance, yes. Otherwise, any Mercury-certified technician can take care of it.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":45626576929059,"sku":"8M0120838","price":283.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8m0120838_main.jpg?v=1760631492","url":"https:\/\/partsvu.com\/en-au\/products\/mercury-15-20-hp-300-hour-service-kit-8m0120838-s-n-0r235949-0r833819","provider":"PartsVu","version":"1.0","type":"link"}