{"product_id":"mercury-piston-rings-fits-mcm-4-5l-mpi-39-8m0095920","title":"Mercury - Piston Rings - Fits MCM 4.5L MPI - 39-8M0095920","description":"\u003cp data-start=\"274\" data-end=\"646\"\u003eThe heart of any high-performance marine engine lives in its cylinders — and keeping those cylinders sealed tight is what the \u003cstrong data-start=\"400\" data-end=\"446\"\u003eMercury Marine Piston Rings - 39-8M0095920\u003c\/strong\u003e are built to do. Designed specifically for Mercury’s 4.5L MPI MCM engines, these rings ensure tight, consistent compression so every stroke delivers the power, efficiency, and reliability you expect.\u003c\/p\u003e\n\u003cp data-start=\"648\" data-end=\"1152\"\u003eCrafted from high-strength, heat-resistant materials, these rings can take the constant pounding, high heat, and corrosive environment that comes with marine operation. They maintain a precision seal between the piston and cylinder wall, keeping combustion pressure right where it belongs while controlling oil flow to prevent excess burn-off. That balance is critical for performance, fuel efficiency, and long-term engine health — especially in a high-torque, high-output setup like Mercury’s 4.5L MPI.\u003c\/p\u003e\n\u003ch3 data-start=\"1154\" data-end=\"1176\"\u003eWhy they matter:\u003c\/h3\u003e\n\u003cul data-start=\"1177\" data-end=\"1495\"\u003e\n\u003cli data-start=\"1177\" data-end=\"1266\"\u003eEngineered specifically for Mercury 4.5L MPI MCM engines for perfect fit and function\u003c\/li\u003e\n\u003cli data-start=\"1267\" data-end=\"1357\"\u003eBuilt from marine-grade materials to handle heat, pressure, and corrosive environments\u003c\/li\u003e\n\u003cli data-start=\"1358\" data-end=\"1429\"\u003eHelps restore proper compression and reduce blow-by during rebuilds\u003c\/li\u003e\n\u003cli data-start=\"1430\" data-end=\"1495\"\u003eEnsures even wear and consistent sealing across all cylinders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1497\" data-end=\"1513\"\u003eBest uses:\u003c\/h3\u003e\n\u003col data-start=\"1514\" data-end=\"1750\"\u003e\n\u003cli data-start=\"1514\" data-end=\"1578\"\u003eRestoring power and efficiency during a full engine rebuild\u003c\/li\u003e\n\u003cli data-start=\"1579\" data-end=\"1665\"\u003eReplacing worn or damaged rings to improve compression and reduce oil consumption\u003c\/li\u003e\n\u003cli data-start=\"1666\" data-end=\"1750\"\u003eMaintaining optimal performance in high-hour recreational or commercial engines\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"1752\" data-end=\"1911\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eProper sealing is where real power starts — and with these Mercury piston rings, your 4.5L MPI gets the durability and performance it needs to keep delivering.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46940271608099,"sku":"39-8M0095920","price":54.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/IMG_7189.jpg?v=1744144567","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-piston-rings-fits-mcm-4-5l-mpi-39-8m0095920","provider":"PartsVu","version":"1.0","type":"link"}