{"product_id":"mercury-quicksilver-300-hour-service-kit-8m0149930-3-4l-v6-fourstroke","title":"Mercury Quicksilver 300-Hour Service Kit 8M0149930 — 3.4L V6 FourStroke Outboard","description":"\u003ch2\u003eMercury Quicksilver 300-Hour Service Kit — OEM 8M0149930 | 3.4L V6 FourStroke\u003c\/h2\u003e\u003cp\u003eStay on schedule with your Mercury 3.4L V6 FourStroke 300-hour service using this genuine OEM kit. Mercury has packaged all the major scheduled-replacement components together — filters, spark plugs, thermostat, alternator belt, water pump parts, drain seals, and anodes — so everything arrives in one box, matched to the correct spec for the V6 engine. Engine oil and gear lube are sold separately.\u003c\/p\u003e\u003ch2\u003ePart Information\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e 8M0149930\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercury \/ Quicksilver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOfficial Product Type:\u003c\/strong\u003e 300-hour maintenance service kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Mercury 3.4L V6 FourStroke outboard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial Range:\u003c\/strong\u003e 2B529482 and up (for listed V6 configurations)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN \/ UPC:\u003c\/strong\u003e 745061250079\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Engine oil and gear lubricant are not included — sold separately\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eKit Contents\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOil filter\u003c\/li\u003e\n\u003cli\u003eFuel filter (high- and low-pressure fuel filter service components)\u003c\/li\u003e\n\u003cli\u003e2 oil drain seals\u003c\/li\u003e\n\u003cli\u003e6 spark plugs (V6 quantity)\u003c\/li\u003e\n\u003cli\u003eThermostat\u003c\/li\u003e\n\u003cli\u003eAlternator belt\u003c\/li\u003e\n\u003cli\u003eWater pump repair kit (impeller, housing, gaskets, wear plate, hardware)\u003c\/li\u003e\n\u003cli\u003eAnodes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMercury 3.4L V6 FourStroke 175 HP — serial 2B529482 and up\u003c\/li\u003e\n\u003cli\u003eMercury 3.4L V6 FourStroke 200 HP — serial 2B529482 and up\u003c\/li\u003e\n\u003cli\u003eMercury 3.4L V6 FourStroke 225 HP — serial 2B529482 and up\u003c\/li\u003e\n\u003cli\u003eConfirm exact engine model and serial number before ordering — Mercury uses different 300-hour kits for the 4.6L V8 CMS\/SeaPro\/Pro XS (8M0149931) and 4.6L V8 Verado families (8M0149932)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated Service Kits\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"\/products\/mercury-4-6l-v8-verado-seapro-300-hour-service-kit-8m0149932\"\u003eMercury 4.6L V8 Verado \u0026amp; SeaPro 300-Hour Service Kit — 8M0149932\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eWhen to Use This Kit\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAt the 300-hour scheduled service interval for a compatible Mercury 3.4L V6 FourStroke\u003c\/li\u003e\n\u003cli\u003eCovers lubrication, fuel, ignition, cooling, belt-drive, and corrosion-protection maintenance in one service event\u003c\/li\u003e\n\u003cli\u003eAny time a comprehensive engine service is required for this engine family\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eService Interval\u003c\/h2\u003e\u003cp\u003eThis kit covers the 300-hour major service interval specified in the Mercury maintenance schedule for 3.4L V6 FourStroke outboards. Follow all applicable Mercury service procedures for each component during the service event.\u003c\/p\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFollow the Mercury maintenance schedule and service procedures for each component in the kit\u003c\/li\u003e\n\u003cli\u003eInspect the water-pump housing, belt tensioner, thermostat housing, fuel system connections, anode mounting surfaces, and drain-plug sealing areas while the engine is being serviced\u003c\/li\u003e\n\u003cli\u003ePurchase engine oil and gear lubricant separately to complete the service\u003c\/li\u003e\n\u003cli\u003eRecord the service date and hours at completion\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical FAQ\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between 8M0149930, 8M0149931, and 8M0149932?\u003c\/strong\u003e\u003cbr\u003eThese three kits look nearly identical but are engine-specific. 8M0149930 is for the 3.4L V6 FourStroke. 8M0149931 is for the 4.6L V8 CMS, SeaPro, and Pro XS. \u003ca href=\"\/products\/mercury-4-6l-v8-verado-seapro-300-hour-service-kit-8m0149932\"\u003e8M0149932\u003c\/a\u003e is for the 4.6L V8 Verado and Verado SeaPro. The components inside each kit differ to match each engine’s specific service requirements.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs engine oil included?\u003c\/strong\u003e\u003cbr\u003eNo. Engine oil and gear lubricant are not included in this kit and must be purchased separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm this kit is right for my engine?\u003c\/strong\u003e\u003cbr\u003eConfirm the engine displacement (3.4L), configuration (V6), and serial number (2B529482 and up) against the application list above. If your engine is a V8 or a Verado, it requires a different kit.\u003c\/p\u003e\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\u003cp\u003eThe most common mistake with the 300-hour service kit lineup is mixing up the V6 and V8 kits — the boxes and part numbers look similar, and the engines are often the same horsepower class, which makes it easy to grab the wrong one. Always confirm the engine’s displacement and architecture (V6 vs. V8, FourStroke vs. Verado) before ordering. This kit is the right choice when a customer wants to do everything at once at the 300-hour mark and wants OEM parts throughout. Remind customers that oil and gear lube are sold separately. Browse the full \u003ca href=\"\/collections\/mercury-mercruiser-engine-maintenance-parts\"\u003eMercury Engine Maintenance Parts\u003c\/a\u003e collection for oils, gear lube, and additional service items.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":51324694134820,"sku":"8M0149930","price":507.61,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/00af1474-6703-4ee0-83dc-e661f6fd1282.png?v=1788207806","url":"https:\/\/marisolmarine.com\/products\/mercury-quicksilver-300-hour-service-kit-8m0149930-3-4l-v6-fourstroke","provider":"Marisol Marine Company","version":"1.0","type":"link"}