{"product_id":"8m0151470-maintenance-kit-for-mercury-mariner-15hp-20hp-efi-4-stroke-jlm-marine","title":"8M0151470 Maintenance Kit for Mercury Mariner 15HP 20HP EFI 4-Stroke | JLM Marine","description":"\u003ch2\u003e8M0151470 Maintenance Kit for Mercury Mariner 15HP 20HP EFI 4-Stroke\u003c\/h2\u003e\n\n\u003cp\u003eThis comprehensive maintenance kit is specifically designed for \u003cstrong\u003eMercury Mariner 15HP and 20HP EFI 4-Stroke outboard motors\u003c\/strong\u003e with serial numbers \u003cstrong\u003e0R833820 and above\u003c\/strong\u003e. It provides all the essential components needed for a complete service, including water pump impeller assembly, thermostat, fuel filter, oil filter, and critical gaskets.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirect Replacement for OEM Part Number:\u003c\/strong\u003e 8M0151470, 8M0135821. This aftermarket kit delivers reliable performance and fit for your scheduled maintenance needs.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eComplete maintenance solution with water pump, filters, and sealing components\u003c\/li\u003e\n\u003cli\u003eDesigned for EFI (Electronic Fuel Injection) 4-stroke models\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary gaskets and seals for proper installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e8M0151470\u003c\/td\u003e\n\u003ctd\u003ePrimary OEM maintenance kit number\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e8M0135821\u003c\/td\u003e\n\u003ctd\u003eWater pump impeller kit component\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Mariner Quicksilver Marine\u003c\/td\u003e\n\u003ctd\u003e15 \/ 20 EFI FourStrokes\u003c\/td\u003e\n\u003ctd\u003e15HP - 20HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eS\/N: 0R833820 \u0026amp; above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003e8M0151470\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Brand\u003c\/td\u003e\n\u003ctd\u003eMercury Mariner Quicksilver Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Type\u003c\/td\u003e\n\u003ctd\u003eEFI 4-Stroke Outboard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHorsepower Range\u003c\/td\u003e\n\u003ctd\u003e15HP - 20HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Number Range\u003c\/td\u003e\n\u003ctd\u003e0R833820 \u0026amp; above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis complete maintenance kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × Water Pump Impeller Kit\u003c\/strong\u003e \u003cspan style=\"color:red;\"\u003e(46-8M0135821 \/ 8M01358211)\u003c\/span\u003e containing:\n\u003cul\u003e\n\u003cli\u003e8M0134493 Housing base\u003c\/li\u003e\n\u003cli\u003e8M0137347 Key\u003c\/li\u003e\n\u003cli\u003e8M0135804 Gasket\u003c\/li\u003e\n\u003cli\u003e8M0135806 Gasket\u003c\/li\u003e\n\u003cli\u003e8M0135805 Plate\u003c\/li\u003e\n\u003cli\u003e803751 Insert cup\u003c\/li\u003e\n\u003cli\u003e8036674 Seal\u003c\/li\u003e\n\u003cli\u003e8M0134492 Housing\u003c\/li\u003e\n\u003cli\u003e803752 Oil seal\u003c\/li\u003e\n\u003cli\u003e8M0135803 Impeller\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × Thermostat\u003c\/strong\u003e (8M0139434)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × Thermostat Gasket\u003c\/strong\u003e (27-8M0214960)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × Fuel Filter\u003c\/strong\u003e (35-8M0134466)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × Oil Filter\u003c\/strong\u003e (35-8M0162831)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × Cotter Pin\u003c\/strong\u003e (8150264)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 × Drain Gaskets\u003c\/strong\u003e \u003cspan style=\"color:red;\"\u003e(1 × 12-895146 \u0026amp; 2 × 8M0082880)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreparation:\u003c\/strong\u003e Disconnect the battery and gather necessary tools including a torque wrench, screwdrivers, and basin for draining fluids. Ensure your work area is clean and well-lit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Change:\u003c\/strong\u003e Remove the oil drain plug using the appropriate drain gasket from the kit and drain old oil completely. Replace the oil filter (35-8M0162831) and refill with manufacturer-recommended oil to proper level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Filter Replacement:\u003c\/strong\u003e Locate the fuel filter assembly and relieve fuel system pressure. Replace the old fuel filter with the new unit (35-8M0134466) ensuring proper orientation and secure connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Pump Disassembly:\u003c\/strong\u003e Remove the lower unit and gearcase to access the water pump housing. Carefully remove the old impeller, housing, and all gaskets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspect Components:\u003c\/strong\u003e Clean the water pump housing base and inspect for wear, corrosion, or damage. Replace the housing if any damage is found.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall New Impeller:\u003c\/strong\u003e Lubricate the new impeller (8M0135803) with glycerin or soapy water and install with blades oriented in the correct rotation direction. Insert the key (8M0137347) into its slot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssemble Water Pump:\u003c\/strong\u003e Install the insert cup (803751), plate (8M0135805), seals (8036674, 803752), and gaskets (8M0135804, 8M0135806) in proper sequence. Place the housing (8M0134492) and housing base (8M0134493) ensuring proper alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermostat Replacement:\u003c\/strong\u003e Remove the thermostat cover and old thermostat. Install the new thermostat (8M0139434) with the new gasket (27-8M0214960) ensuring proper seating and orientation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReassemble Lower Unit:\u003c\/strong\u003e Reinstall the gearcase and lower unit, torquing all fasteners to manufacturer specifications. Install the cotter pin (8150264) where required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal Checks:\u003c\/strong\u003e Verify all drain plugs are tight with new gaskets installed. Double-check all connections, fasteners, and hose clamps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Test:\u003c\/strong\u003e Reconnect the battery and run the engine in a test tank or on muffs. Check for proper water flow from the telltale, leaks, and smooth operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePost-Installation:\u003c\/strong\u003e Monitor engine temperature and performance during initial use. Inspect for leaks after the first run and re-torque fasteners as needed.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this maintenance kit fits my Mercury outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: Verify your engine is a Mercury Mariner 15HP or 20HP EFI 4-Stroke model with serial number 0R833820 or above. Check your engine's identification plate or consult the Mercury serial number guide linked above to confirm compatibility before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the water pump impeller and perform this maintenance?\u003c\/strong\u003e\u003cbr\u003e\nA: Mercury recommends replacing the water pump impeller annually or every 100-300 hours of operation, whichever comes first. Oil and fuel filters should be changed at least once per season or per manufacturer's maintenance schedule to ensure optimal engine performance and longevity.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my water pump or thermostat needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common warning signs include weak or no water stream from the telltale outlet, engine overheating, steam from the engine, loss of power, or the overheat alarm activating. If you notice any of these symptoms, inspect and replace the water pump impeller and thermostat immediately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I replace just the impeller or do I need the complete water pump kit?\u003c\/strong\u003e\u003cbr\u003e\nA: While you can replace just the impeller, it's highly recommended to replace all gaskets, seals, and wear components together as included in this complete kit. This ensures proper sealing, prevents future leaks, and maximizes the service life of your repair.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do I need any special tools to install this maintenance kit?\u003c\/strong\u003e\u003cbr\u003e\nA: Basic marine mechanic tools are required including socket sets, screwdrivers, a torque wrench, and a lower unit removal tool. You'll also need impeller grease or glycerin for lubricating the new impeller during installation. Consult your Mercury service manual for specific torque specifications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM or aftermarket part? What's the difference?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n\u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51981001621817,"sku":"23KM774","price":74.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_b08b7118-ab97-4d43-8577-f6d0ec8f6a09.png?v=1772456406","url":"https:\/\/jlmmarine.com\/es\/products\/8m0151470-maintenance-kit-for-mercury-mariner-15hp-20hp-efi-4-stroke-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}