{"product_id":"seal-8597721","title":"Quicksilver – Cylinder Bore Seal | Engine Sealing Components | Precision Fit Design | 8597721","description":"\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQuicksilver – Cylinder Bore Seal | Engine Sealing Components | Precision Fit Design | 8597721\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOverview\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Anyone who has spent enough time running a Mercury outboard knows how much trust you place in the internal seals. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThey’re hidden away\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e, doing quiet work, yet they make the difference between an engine that pulls hard and one that feels tired.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e This Quicksilver cylinder bore seal has that dependable, reassuring feel — the kind of part you install once and forget about because it simply does its job every time you turn the key. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhen your powerhead \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eis sealed\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e the way Mercury intended, everything downstream \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ejust\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e feels tighter and smoother.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKey Features\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePrecision-fit cylinder bore seal for select Mercury and Mariner engines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned for EFI and DFI outboards in the 135–200 horsepower range\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFits select 175–240 horsepower JetDrive SportJet engines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eBuilt to Mercury Marine OEM engineering standards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEasy to install using common tools\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQuicksilver part number 8597721\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury and Mariner 135–200 horsepower EFI and DFI outboards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSelect Mercury JetDrive 175–240 horsepower SportJets\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCommon for performance fishing boats, jet boats, pontoons, and family runabouts\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSuitable for both freshwater and coastal setups\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e A proper bore seal creates a cleaner, tighter combustion environment, which translates into steadier throttle response and healthier engine behavior.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e You’ll notice the benefits most in the mid-range — that sweet spot where engines spend so much of their life. The seal’s structure helps maintain consistent compression, improving efficiency and long-term reliability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIn real-world use, the part stands up well to the heat and pressure changes that come with long days on the water. Installation is straightforward, and once it’s in place, it sits securely without fuss or re-torqueing. That steady, secure fit is what keeps your engine feeling strong from one season to the next.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhy Buy OEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Internal engine components aren’t the place to experiment. With a genuine Mercury Marine part, you know you’re getting the exact fitment and material quality your engine \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ewas designed around\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eAftermarket seals may look identical \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ebut\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eoften\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e miss the small details — \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003etolerance\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e, compression resistance, \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003elongevity\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e — that keep your engine performing at its best.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Choosing OEM is about avoiding problems before they start and protecting the investment sitting on your transom.\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 engines does this bore seal fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits select Mercury and Mariner 135–200 horsepower EFI and DFI outboards, \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eplus\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ecertain\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e JetDrive SportJet engines.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: What sets it apart from aftermarket seals?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Its exact fit and Mercury-specific engineering ensure long-term reliability under real marine operating conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I confirm it’s the right part?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCheck\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e your service manual or parts listing.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e If it calls for part number 8597721, this is the match.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Can it 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. The material holds up well in both environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is installation easy?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e For most mechanically comfortable boat owners or technicians, installation is very straightforward.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":45626537443619,"sku":"8597721","price":11.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8597721_main.jpg?v=1760631251","url":"https:\/\/partsvu.com\/en-mx\/products\/seal-8597721","provider":"PartsVu","version":"1.0","type":"link"}