{"product_id":"mercury-cap-assy-36-8m0073266","title":"Mercury – Oil Tank Cap Assembly | DFI OptiMax 75–125HP | 36-8M0073266","description":"\u003cp data-start=\"0\" data-end=\"69\"\u003eMercury – Oil Tank Cap Assembly | DFI OptiMax 75–125HP | 36-8M0073266\u003c\/p\u003e\n\u003chr data-start=\"71\" data-end=\"74\"\u003e\n\u003ch3 data-start=\"76\" data-end=\"90\"\u003eOverview\u003c\/h3\u003e\n\u003cp data-start=\"91\" data-end=\"623\"\u003eAnyone who’s spent time with a 75–125HP OptiMax knows the oil tank cap isn’t something you think about—until it starts acting up. A cap that doesn’t seal right can let air sneak into the system, leave a light mist of oil under the cowl, or trip those random oil alarms that make you second-guess your whole day on the water. This OEM cap assembly replaces everything in one go: the cap, base, spacer, O-ring, tether, and the little hardware bits. Once it’s on, the tank seals properly again and the engine stops giving you attitude.\u003c\/p\u003e\n\u003chr data-start=\"625\" data-end=\"628\"\u003e\n\u003ch3 data-start=\"630\" data-end=\"648\"\u003eKey Features\u003c\/h3\u003e\n\u003cp data-start=\"649\" data-end=\"1078\"\u003e • \u003cstrong data-start=\"652\" data-end=\"688\"\u003eFits 75–125HP DFI OptiMax models\u003c\/strong\u003e – Covers engines in serial range 0T980000–2B123429.\u003cbr data-start=\"740\" data-end=\"743\"\u003e • \u003cstrong data-start=\"746\" data-end=\"764\"\u003eAll-in-One Kit\u003c\/strong\u003e – New cap, base, spacer, O-ring, nuts, and tether.\u003cbr data-start=\"815\" data-end=\"818\"\u003e • \u003cstrong data-start=\"821\" data-end=\"840\"\u003eSnug, Clean Fit\u003c\/strong\u003e – Molded cap sits square and seals the tank neck the way it should.\u003cbr data-start=\"908\" data-end=\"911\"\u003e • \u003cstrong data-start=\"914\" data-end=\"942\"\u003eMade for Real Marine Use\u003c\/strong\u003e – Handles heat, vibration, and oil vapor without warping.\u003cbr data-start=\"1000\" data-end=\"1003\"\u003e • \u003cstrong data-start=\"1006\" data-end=\"1021\"\u003eOEM-Correct\u003c\/strong\u003e – Built to Mercury’s specs so the system stays airtight.\u003c\/p\u003e\n\u003chr data-start=\"1080\" data-end=\"1083\"\u003e\n\u003ch3 data-start=\"1085\" data-end=\"1118\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h3\u003e\n\u003cp data-start=\"1119\" data-end=\"1260\"\u003e • Mercury 75HP OptiMax\u003cbr data-start=\"1142\" data-end=\"1145\"\u003e • Mercury 90HP OptiMax\u003cbr data-start=\"1168\" data-end=\"1171\"\u003e • Mercury 115HP OptiMax\u003cbr data-start=\"1195\" data-end=\"1198\"\u003e • Mercury 125HP OptiMax\u003cbr data-start=\"1222\" data-end=\"1225\"\u003e • Serial range 0T980000–2B123429\u003c\/p\u003e\n\u003chr data-start=\"1262\" data-end=\"1265\"\u003e\n\u003ch3 data-start=\"1267\" data-end=\"1305\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1306\" data-end=\"1724\"\u003ePutting on a fresh cap assembly usually clears up the little annoyances that creep in with age—oil mist, loose caps, and random beeps when nothing is actually wrong. A good seal keeps air out of the oil system, which helps the engine keep steady pressure, especially when the water gets rough. It’s a small part, but on these OptiMax motors, it makes a noticeable difference in how predictable the oiling system feels.\u003c\/p\u003e\n\u003chr data-start=\"1726\" data-end=\"1729\"\u003e\n\u003ch3 data-start=\"1731\" data-end=\"1748\"\u003eWhy Buy OEM\u003c\/h3\u003e\n\u003cp data-start=\"1749\" data-end=\"2048\"\u003eOptiMax systems are touchy about air leaks. An aftermarket cap might look close, but “close” doesn’t cut it here. OEM caps sit right, clamp tight, and the O-ring material holds up to heat and oil fumes. It’s the difference between a system that behaves—and one that throws alarms for no good reason.\u003c\/p\u003e\n\u003chr data-start=\"2050\" data-end=\"2053\"\u003e\n\u003ch3 data-start=\"2055\" data-end=\"2064\"\u003eFAQ\u003c\/h3\u003e\n\u003cp data-start=\"2065\" data-end=\"2225\"\u003e\u003cstrong data-start=\"2065\" data-end=\"2127\"\u003eQ1: What are the usual signs the oil cap assembly is shot?\u003c\/strong\u003e\u003cbr data-start=\"2127\" data-end=\"2130\"\u003e\u003cstrong data-start=\"2130\" data-end=\"2136\"\u003eA:\u003c\/strong\u003e Light oil residue, a cap that never feels tight, or random oil alarms at idle or cruise.\u003c\/p\u003e\n\u003cp data-start=\"2227\" data-end=\"2334\"\u003e\u003cstrong data-start=\"2227\" data-end=\"2276\"\u003eQ2: Does the kit come with everything I need?\u003c\/strong\u003e\u003cbr data-start=\"2276\" data-end=\"2279\"\u003e\u003cstrong data-start=\"2279\" data-end=\"2285\"\u003eA:\u003c\/strong\u003e Yep—cap, base, spacer, O-ring, tether, and nuts.\u003c\/p\u003e\n\u003cp data-start=\"2336\" data-end=\"2431\"\u003e\u003cstrong data-start=\"2336\" data-end=\"2365\"\u003eQ3: Can I swap it myself?\u003c\/strong\u003e\u003cbr data-start=\"2365\" data-end=\"2368\"\u003e\u003cstrong data-start=\"2368\" data-end=\"2374\"\u003eA:\u003c\/strong\u003e Most folks can. It’s a quick, easy job with basic tools.\u003c\/p\u003e\n\u003cp data-start=\"2433\" data-end=\"2565\"\u003e\u003cstrong data-start=\"2433\" data-end=\"2487\"\u003eQ4: Will this fix air getting into the oil system?\u003c\/strong\u003e\u003cbr data-start=\"2487\" data-end=\"2490\"\u003e\u003cstrong data-start=\"2490\" data-end=\"2496\"\u003eA:\u003c\/strong\u003e If the cap seal was the culprit, this usually solves it immediately.\u003c\/p\u003e\n\u003cp data-start=\"2567\" data-end=\"2671\"\u003e\u003cstrong data-start=\"2567\" data-end=\"2590\"\u003eQ5: Why choose OEM?\u003c\/strong\u003e\u003cbr data-start=\"2590\" data-end=\"2593\"\u003e\u003cstrong data-start=\"2593\" data-end=\"2599\"\u003eA:\u003c\/strong\u003e Better seal, better materials, and fewer mystery alarms—simple as that.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46940405661987,"sku":"36-8M0073266","price":38.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8M0073266.jpg?v=1761313539","url":"https:\/\/partsvu.com\/en-mx\/products\/mercury-cap-assy-36-8m0073266","provider":"PartsVu","version":"1.0","type":"link"}