{"product_id":"mercury-head-gasket-set-27-8m6010321","title":"Mercury – Cylinder Head Gasket | Yamaha 4.2L Series | Marine-Grade Composite | 8M6010321","description":"\u003ch3\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury – Cylinder Head Gasket | Yamaha 4.2L Series | Marine-Grade Composite | 8M6010321\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOverview\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThere’s a certain confidence that settles in when your engine fires up clean and strong—the kind of confidence you only get when every critical seal in your motor is doing its job. On a big 4.2-liter Yamaha outboard, nothing is more important than keeping combustion where it belongs. That’s why boaters who run hard and expect reliability turn to a gasket they can trust. The Quicksilver 8M6010321 Cylinder Head Gasket delivers that steady, reassuring performance, giving you the peace of mind that your engine \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eis sealed\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003etight\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e whether you’re cruising at sunrise or making a long offshore run home at dusk.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKey Features\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned for select 4.2-liter Yamaha outboards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eM\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eeets all original equipment specifications for sealing pressure and durability\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eFits \u003c\/span\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eeither\u003c\/span\u003e\u003c\/strong\u003e\u003cspan data-preserver-spaces=\"true\"\u003e the port or starboard cylinder bank\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMarine-grade composite construction engineered for heat, pressure, and water intrusion\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCylinder head gasket only; installation hardware sold separately\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eReplaces Yamaha OEM part number \u003c\/span\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003e6CB-11181-00-00\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eBuilt for Yamaha 4.2L four-stroke outboards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eC\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eommonly found on offshore center consoles, bay boats, dual consoles, and coastal fishing rigs\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSuitable for high-load applications, long-distance cruising, and heavy daily use\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWorks with both freshwater and saltwater configurations when installed per manufacturer guidelines\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eA\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e cylinder head gasket may not be the flashiest component on your outboard, but you feel its importance in every smooth throttle push and steady idle. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThe Quicksilver 8M6010321 \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eis engineered\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e to \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ehold firm against\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e constant heat cycles, high compression, and the pounding vibration marine engines \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eface\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e mile after mile.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eO\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ence installed, you’ll notice how confidently your engine settles into gear—no hesitation, no wandering idle, just a tight, secure seal that supports clean combustion and proper cooling. It’s the kind of part that just quietly does its job, letting you focus on the ride instead of worrying about what’s happening under the cowling.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eBe\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ecause it fits either side of the powerhead, you won’t have to double-check left-versus-right differences during ordering. And with OEM-level specifications, it installs with the right fit and crush profile on the first try, preventing \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ethe leaks\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e or uneven seating that can happen with lower-grade aftermarket options.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhy Buy OEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eChoosing a genuine Quicksilver gasket isn’t about buying the most expensive option—it’s about avoiding the problems that come from lesser ones. An OEM-spec gasket gives you:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eA perfect match to Yamaha’s original sealing surface\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eLong-term reliability under extreme heat and pressure\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eProtection against coolant seepage and compression loss\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eConsistent thickness and uniformity for proper torque loading\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIf you want your outboard to keep running strong season after season, this is the kind of part you don’t compromise on.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFAQ\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ1: Which Mercury engines does this fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e This part does not fit Mercury engines. It’s a Quicksilver replacement designed for select Yamaha 4.2L outboards.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: What makes this different from aftermarket gaskets?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e I\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003et’s built to precise OEM specifications, ensuring proper sealing, correct crush, and long-term reliability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I confirm it fits my Yamaha?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Check your engine model and serial number, then verify with your service manual.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Can it be used in saltwater?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes. With proper maintenance, it performs reliably in both saltwater and freshwater 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 skilled DIY boaters can handle the install, but a torque wrench and \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003efull\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e adherence to Yamaha procedures are essential.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46940777087267,"sku":"27-8M6010321","price":189.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8M6010321_Main-1.jpg?v=1760631534","url":"https:\/\/partsvu.com\/en-mx\/products\/mercury-head-gasket-set-27-8m6010321","provider":"PartsVu","version":"1.0","type":"link"}