{"title":"Mercury 20 HP \u0026 30 HP Complete 100 \u0026 300 Hour Service Maintenance Kits","description":"\u003cp\u003eMercury Marine 100-hour maintenance kits and Mercury Marine 300-hour maintenance kits are available for 20 \u0026amp; 30 HP outboards. These kits contain genuine Mercury Marine outboard parts, conveniently assembled to meet the service needs of your Mercury 20 \u0026amp; 30 HP outboard.\u003c\/p\u003e\n\u003cp\u003eEach kit contains the outboard parts and products you need for proper Mercury-directed 100-hour or 300-hour service. Kits include parts and products such as Mercury outboard oil filters, Mercury gearcase drain seals, Mercury gear lube, Mercury thermostat kits, Mercury fuel filters, NGK spark plugs, Mercury anodes, belts, Mercury water pump repair kits, Mercury in-line fuel filters, Mercury fuel rail filters. Additionally, each Mercury 100-hour service kit or Mercury 300-hour service kit includes the proper amount of Mercury-specified oil and Mercury Precision Lubricants High Performance Gear Lube.\u003c\/p\u003e\n\u003cp\u003eEach kit contains the outboard parts and products you need for proper Mercury-directed Marine Mercury 20 HP \u0026amp; 30 HP Complete 100 \u0026amp; 300 Hour Service Maintenance Kits. Kits include parts and products such as Mercury outboard oil filters, Mercury gear-case drain seals, Mercury gear lube, Mercury thermostat kits, Mercury fuel filters, NGK spark plugs, Mercury anodes, belts, Mercury water pump repair kits, Mercury in-line fuel filters, Mercury fuel rail filters. Additionally, each Mercury 100-hour service kit or Mercury 300-hour service kit includes Mercury Precision Lubricants like Mercury 10W-30 Marine Oil, Mercury 25W-40 Marine Oil, Mercury 25W-40 Synthetic Blend Marine Oil, and Mercury Precision Lubricants High Performance Gear Lube. Mercury Marine is dedicated to advancing boating performance by continually re-inventing the science and engineering behind every Mercury product. So that you can go faster, go farther, go boldly.\u003c\/p\u003e\n\u003cp\u003eMercury Marine Mercury 20 HP \u0026amp; 30 HP Complete 100- \u0026amp; 300-Hour Service Maintenance Kits contain genuine Mercury Marine outboard parts, conveniently assembled to meet the service needs of your specific Mercury engine.\u003c\/p\u003e","products":[{"product_id":"mercury-20-30-hp-300-hour-service-kit-8m0120839-s-n-0r106999-above","title":"Mercury – 300 Hour Maintenance Kit | FourStroke Service Package | Complete Engine Care Components | 8M0120839","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury – 300 Hour Maintenance Kit | FourStroke Service Package | Complete Engine Care Components | 8M0120839\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\"\u003eThere’s a certain kind of confidence you get when you know your outboard is properly cared for—the kind that lets you run a little farther, stay a little longer, and push through whatever the day brings. When you’re depending on a 25–30 horsepower Mercury FourStroke, that confidence comes from routine upkeep done the right way. The Mercury 8M0120839 300 Hour Maintenance Kit delivers exactly that feeling.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eInstead of gathering parts piece by piece, this kit puts every essential component for your 300-hour service into one clean, complete package. It’s built for boaters who want their engine to start quickly, idle smoothly, and keep climbing through the powerband without hesitation. Whether you fish the marshes before dawn or cruise the lake with the family on weekends, this kit helps keep your engine performing with the same steady reliability you’ve come to expect.\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\"\u003eComplete 300-hour service kit for Mercury 25–30hp FourStroke outboards.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIncludes oil filter, fuel filter, spark plugs (three), oil drain seal, thermostat and gaskets, gearcase seals, unit anode, and water pump impeller kit.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eHigh-pleat oil and fuel filters deliver superior filtration for cleaner, healthier engine operation.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eHeavy-duty electroplated housings resist corrosion in harsh marine environments.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePrecision-built components engineered to exact Mercury Marine specifications.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWorks seamlessly with 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 25–30hp FourStroke outboards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFor engines within serial numbers 0R106999 through 1R162636\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eIdeal for ski\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003effs, jon boats, inflatable tenders, aluminum fishing rigs, and utility boats\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSuitable for freshwater and coastal boating environments\u003c\/span\u003e\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\"\u003eA 300-hour service can completely refresh the way your engine runs. Clean filters help fuel and oil move freely, giving you stronger throttle response and smoother mid-range power. New spark plu\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003egs bring back that crisp, easy starting you remember from the first day you ran the engine.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThe impeller replacement is one of the most important steps in the service. A strong, healthy water pump keeps temperatures stable so your engine stays protected even during long idles, extended trolling runs, or full-throttle stretches across open water. Fresh gearcase seals add another layer of defense by reducing the likelihood of water intrusion, helping gears and bearings last longer.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEvery part in this kit works together to give you that tight, steady, trustworthy running quality Mercury FourStrokes are known for. When your maintenance is done right, you feel it every time you leave the dock.\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\n\u003cspan data-preserver-spaces=\"true\"\u003eG\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eenuine Mercury parts ensure exact fit and consistent performance\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned specifically for your 25–30hp FourStroke—no guessing, no mismatches\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMore durable and reliable than many aftermarket alternatives\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eHelps preserve engine life and protect your investment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eBacked by decades of Mercury Marine engineering and testing\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSe\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003easoned boaters will tell you the same thing: OEM parts simply hold up better, especially when your engine earns its hours in real-world conditions.\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 8M0120839 kit fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits Mercury 25–30hp FourStroke outboards within serial numbers 0R106999–1R162636.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: How is this different from aftermarket kits?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Mercury filters, seals, and components are engineered to tighter tolerances and built for long-term marine 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 Check your engine’s serial number and match it to the supported range.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Can this kit be used in saltwater and freshwater?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes—every part is designed to handle both environments.\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 with routine maintenance, yes. Otherwise, any Mercury dealer can perform the service.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":45626597507363,"sku":"8M0120839","price":277.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8M0120839_Main.jpg?v=1760631384"},{"product_id":"mercury-20-30-hp-complete-300-hour-service-maintenance-kit-10w-30-8m0120839-s-n-0r106999-above","title":"Mercury 20\/30 HP Complete 300 Hour Service Maintenance Kit 10W-30 - 8M0120839 - S\/N 0R106999 \u0026 Above","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 \u003ca href=\"https:\/\/partsvu.com\/collections\/blackstone-laboratories\"\u003eoil analysis kits\u003c\/a\u003e. Results are typically received in a few days via email. \u003ca href=\"https:\/\/partsvu.com\/collections\/blackstone-laboratories\"\u003eShop now\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eMercury | 300 Hour Service Kit | 20\/30 HP | 8M0120839\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eMercury 300 Hour Service Kit – 8M0120839\u003c\/strong\u003e provides the essential maintenance components needed to service Mercury \u003cstrong\u003e20 HP and 30 HP four-stroke outboards\u003c\/strong\u003e with serial numbers \u003cstrong\u003e0R106999 and above\u003c\/strong\u003e. This comprehensive maintenance kit bundles the key oils, filters, cooling system components, ignition parts, and seals required for the 300-hour service interval.\u003c\/p\u003e\n\n\u003cp\u003eRoutine maintenance at recommended service intervals helps maintain reliable engine performance, protect internal components, and extend the life of your outboard. This kit simplifies the process by including the common wear components that should be replaced during the 300-hour service, ensuring your Mercury outboard continues operating efficiently and reliably.\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\u003e2 x\u003c\/strong\u003e Quarts 10W-30 Engine Oil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Quart Gear Lube\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Oil Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Fuel Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Oil Drain Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 x\u003c\/strong\u003e Gearcase Drain Seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Thermostat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Thermostat Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 x\u003c\/strong\u003e Spark Plugs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Water Pump Impeller Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Anode\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin:24px 0;\"\u003e\n\n\u003ch3\u003eBenefits of Performing the 300 Hour Service\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintain proper engine lubrication\u003c\/strong\u003e with fresh engine oil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtect the gearcase\u003c\/strong\u003e with new gear lube and drain seals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnsure cooling system efficiency\u003c\/strong\u003e with a new thermostat and impeller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImprove ignition reliability\u003c\/strong\u003e with fresh spark plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevent corrosion\u003c\/strong\u003e by replacing the sacrificial anode.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin:24px 0;\"\u003e\n\n\u003ch3\u003eEngine Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMercury 20 HP Four-Stroke Outboards\u003c\/li\u003e\n\u003cli\u003eMercury 30 HP Four-Stroke Outboards\u003c\/li\u003e\n\u003cli\u003eSerial Numbers \u003cstrong\u003e0R106999 and Above\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eAlways verify your Mercury outboard serial number before ordering to ensure proper compatibility.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":47125896266019,"sku":"PVM00098","price":333.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8m0120839-1030.jpg?v=1701377083"},{"product_id":"mercury-20-30-hp-complete-300-hour-service-maintenance-kit-10w-30-synthetic-blend-8m0120839-s-n-0r106999-above","title":"Mercury 20\/30 HP Complete 300 Hour Service Maintenance Kit 10W-30 Synthetic Blend - 8M0120839 - S\/N 0R106999 \u0026 Above","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 \u003ca href=\"https:\/\/partsvu.com\/collections\/blackstone-laboratories\"\u003eoil analysis kits\u003c\/a\u003e. Results are typically received in a few days via email. \u003ca href=\"https:\/\/partsvu.com\/collections\/blackstone-laboratories\"\u003eShop now\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eMercury | 300 Hour Service Kit | 20\/30 HP | 8M0120839\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eMercury 300 Hour Service Kit – 8M0120839\u003c\/strong\u003e provides the essential maintenance components required to properly service Mercury \u003cstrong\u003e20 HP and 30 HP four-stroke outboards\u003c\/strong\u003e with serial numbers \u003cstrong\u003e0R106999 and above\u003c\/strong\u003e. This comprehensive maintenance kit includes the critical oils, filters, cooling system components, ignition parts, and seals needed to complete the recommended 300-hour service interval.\u003c\/p\u003e\n\n\u003cp\u003ePerforming routine maintenance helps maintain dependable performance, protect internal engine components, and ensure proper cooling and lubrication. This kit simplifies the service process by bundling the most commonly replaced components so you can efficiently complete scheduled maintenance and keep your Mercury outboard operating at peak performance.\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\u003e2 x\u003c\/strong\u003e Quarts 10W-30 Synthetic Blend Engine Oil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Quart Gear Lube\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Oil Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Fuel Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Oil Drain Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 x\u003c\/strong\u003e Gearcase Drain Seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Thermostat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Thermostat Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 x\u003c\/strong\u003e Spark Plugs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Water Pump Impeller Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Anode\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin:24px 0;\"\u003e\n\n\u003ch3\u003eWhy Perform the 300 Hour Service?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintain engine lubrication\u003c\/strong\u003e with fresh 10W-30 synthetic blend oil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtect the gearcase\u003c\/strong\u003e with new gear lube and drain seals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnsure proper cooling\u003c\/strong\u003e with a new thermostat and water pump impeller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImprove ignition performance\u003c\/strong\u003e with fresh spark plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduce corrosion\u003c\/strong\u003e by replacing the sacrificial anode.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin:24px 0;\"\u003e\n\n\u003ch3\u003eEngine Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMercury 20 HP Four-Stroke Outboards\u003c\/li\u003e\n\u003cli\u003eMercury 30 HP Four-Stroke Outboards\u003c\/li\u003e\n\u003cli\u003eSerial Numbers \u003cstrong\u003e0R106999 and Above\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eAlways verify your engine serial number before ordering to ensure compatibility with your Mercury outboard.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":47125896364323,"sku":"PVM00099","price":339.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8m0120839_1030.jpg?v=1701377083"},{"product_id":"mercury-20-30-hp-complete-300-hour-service-maintenance-kit-25w-40-8m0120839-s-n-0r106999-above","title":"Mercury 20\/30 HP Complete 300 Hour Service Maintenance Kit 25W-40 - 8M0120839 - S\/N 0R106999 \u0026 Above","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 \u003ca href=\"https:\/\/partsvu.com\/collections\/blackstone-laboratories\"\u003eoil analysis kits\u003c\/a\u003e. Results are typically received in a few days via email. \u003ca href=\"https:\/\/partsvu.com\/collections\/blackstone-laboratories\"\u003eShop now\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eMercury | 300 Hour Service Kit | 20\/30 HP | 8M0120839\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eMercury 300 Hour Service Kit – 8M0120839\u003c\/strong\u003e provides the key maintenance components required to service Mercury \u003cstrong\u003e20 HP and 30 HP four-stroke outboards\u003c\/strong\u003e with serial numbers \u003cstrong\u003e0R106999 and above\u003c\/strong\u003e. This complete kit packages the essential oils, filters, cooling system components, ignition parts, and seals required for the recommended 300-hour service interval.\u003c\/p\u003e\n\n\u003cp\u003eRoutine maintenance is critical for maintaining engine reliability, cooling performance, and proper lubrication. By replacing common wear items such as spark plugs, filters, thermostat components, and the water pump impeller, this service kit helps keep your Mercury outboard operating efficiently and reliably season after season.\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\u003e2 x\u003c\/strong\u003e Quarts 25W-40 Engine Oil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Quart Gear Lube\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Oil Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Fuel Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Oil Drain Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 x\u003c\/strong\u003e Gearcase Drain Seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Thermostat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Thermostat Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 x\u003c\/strong\u003e Spark Plugs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Water Pump Impeller Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Anode\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin:24px 0;\"\u003e\n\n\u003ch3\u003eBenefits of the 300 Hour Service\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintain proper lubrication\u003c\/strong\u003e with fresh engine oil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtect the gearcase\u003c\/strong\u003e with new gear lube and drain seals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnsure cooling system efficiency\u003c\/strong\u003e with a new thermostat and impeller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImprove ignition performance\u003c\/strong\u003e with fresh spark plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduce corrosion\u003c\/strong\u003e by replacing the sacrificial anode.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin:24px 0;\"\u003e\n\n\u003ch3\u003eEngine Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMercury 20 HP Four-Stroke Outboards\u003c\/li\u003e\n\u003cli\u003eMercury 30 HP Four-Stroke Outboards\u003c\/li\u003e\n\u003cli\u003eSerial Numbers \u003cstrong\u003e0R106999 and Above\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eAlways verify your Mercury outboard serial number before ordering to ensure proper compatibility.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":47125896397091,"sku":"PVM00100","price":333.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8m0120839-2540.jpg?v=1701377084"},{"product_id":"mercury-20-30-hp-complete-300-hour-service-maintenance-kit-25w-40-synthetic-blend-8m0120839-s-n-0r106999-above","title":"Mercury 20\/30 HP Complete 300 Hour Service Maintenance Kit 25W-40 Synthetic Blend - 8M0120839 - S\/N 0R106999 \u0026 Above","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 \u003ca href=\"https:\/\/partsvu.com\/collections\/blackstone-laboratories\"\u003eoil analysis kits\u003c\/a\u003e. Results are typically received in a few days via email. \u003ca href=\"https:\/\/partsvu.com\/collections\/blackstone-laboratories\"\u003eShop now\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eMercury | 300 Hour Service Kit | 20\/30 HP | 8M0120839\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eMercury 300 Hour Service Kit – 8M0120839\u003c\/strong\u003e provides the essential maintenance components required to perform the recommended 300-hour service on Mercury \u003cstrong\u003e20 HP and 30 HP four-stroke outboards\u003c\/strong\u003e with serial numbers \u003cstrong\u003e0R106999 and above\u003c\/strong\u003e. This complete kit combines the critical oils, filters, cooling system components, ignition parts, and seals required to keep your engine operating reliably.\u003c\/p\u003e\n\n\u003cp\u003eRoutine service intervals help maintain proper lubrication, cooling efficiency, and overall engine performance. By replacing common wear items such as spark plugs, filters, thermostat components, and the water pump impeller, this kit helps extend engine life and maintain dependable performance on the water.\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\u003e2 x\u003c\/strong\u003e Quarts 25W-40 Synthetic Blend Engine Oil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Quart Gear Lube\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Oil Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Fuel Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Oil Drain Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 x\u003c\/strong\u003e Gearcase Drain Seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Thermostat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Thermostat Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 x\u003c\/strong\u003e Spark Plugs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Water Pump Impeller Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x\u003c\/strong\u003e Anode\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin:24px 0;\"\u003e\n\n\u003ch3\u003eBenefits of the 300 Hour Service\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintain engine lubrication\u003c\/strong\u003e with fresh 25W-40 synthetic blend oil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtect the lower unit\u003c\/strong\u003e with new gear lube and drain seals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnsure proper cooling performance\u003c\/strong\u003e with a new thermostat and water pump impeller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImprove ignition efficiency\u003c\/strong\u003e with fresh spark plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduce corrosion\u003c\/strong\u003e by replacing the sacrificial anode.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin:24px 0;\"\u003e\n\n\u003ch3\u003eEngine Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMercury 20 HP Four-Stroke Outboards\u003c\/li\u003e\n\u003cli\u003eMercury 30 HP Four-Stroke Outboards\u003c\/li\u003e\n\u003cli\u003eSerial Numbers \u003cstrong\u003e0R106999 and Above\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eAlways verify your Mercury outboard serial number before ordering to ensure proper compatibility.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":47125896429859,"sku":"PVM00101","price":339.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8m0120839_2540.jpg?v=1701377084"},{"product_id":"blackstone-laboratories-oil-analysis-kit-engine-or-transmission-oil-testing-4-pack","title":"Blackstone Laboratories Oil Analysis Kit - Engine or Transmission Oil Testing - 4-pack","description":"\u003cp\u003ePartsVu has partnered with Blackstone Labratories to give you the opportunity to know exactly how your engine, transmission, gear set, or generator is performing right now, through oil analysis. \u003c\/p\u003e\n\u003cp\u003eYou will receive everything you need to ship an oil sample to the professionals at Blackstone. The lab report will indicate if oil change intervals are on time, if there are contaminants like water, coolant, or salt present, and analyze a full spectrum of metals that might identify premature engine wear before it results in a costly or dangerous failure.\u003c\/p\u003e\n\u003cp\u003eThese oil sample kits can be used with inboard, outboard, gas, and diesel engines. The kits come complete with the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSample Bottle\u003c\/li\u003e\n\u003cli\u003ePlastic Bag \u0026amp; Absorbent Mat\u003c\/li\u003e\n\u003cli\u003eExternal Contaminent Bottle\u003c\/li\u003e\n\u003cli\u003ePrepaid Shipping Label to send the oil sample back to Blackstone Labs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSimply collect a small sample, fill out the sample card and drop the kit in the mailbox. Once Blackstone receives the oil sample, in a few days you will receive an email with the test results and a simplified breakdown of what the results mean. \u003c\/p\u003e\n\u003cp\u003eBlackstone will archive your sample and it can be used for future testing to further determine how your boat is performing over time.\u003c\/p\u003e\n\u003cp\u003eBelow is a sample report:\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/www.partsvu.com\/pub\/media\/wysiwyg\/BlackstoneLabSample1_2.jpg\"\u003e\u003c\/p\u003e","brand":"PartsVu","offers":[{"title":"Default Title","offer_id":48330423107875,"sku":"PVA00002","price":140.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/blackstone_4pack1_1.jpg?v=1714497760"}],"url":"https:\/\/partsvu.com\/en-au\/collections\/mercury-20-hp-30-hp-complete-100-300-hour-service-maintenance-kits.oembed","provider":"PartsVu","version":"1.0","type":"link"}