{"product_id":"mercury-ignition-coil-300-879984t01","title":"Mercury – Ignition Coil, 75–115HP 3-Cylinder \u0026 Various V6 | Ignition | 8M0077471","description":"\u003cp data-start=\"0\" data-end=\"92\"\u003eMercury – Ignition Coil, 75–115HP 3-Cylinder \u0026amp; Various V6 | Ignition | 8M0077471\u003c\/p\u003e\n\u003chr data-start=\"94\" data-end=\"97\"\u003e\n\u003ch3 data-start=\"99\" data-end=\"113\"\u003eOverview\u003c\/h3\u003e\n\u003cp data-start=\"114\" data-end=\"647\"\u003eIf you’ve run two-stroke Mercs for any length of time, you know how one weak ignition coil can make a good motor run like it woke up on the wrong side of the dock. A cylinder drops out, the idle gets lumpy, or the engine falls flat the moment you try to get the boat moving. This coil is the proper replacement for the 75–115HP 3-cylinder OptiMax motors, a bunch of Mercury and Mariner V6 two-strokes, and even the MerCruiser 600Sci. It’s built to hold spark in the hot, damp, vibrating mess that is a real marine engine compartment.\u003c\/p\u003e\n\u003chr data-start=\"649\" data-end=\"652\"\u003e\n\u003ch3 data-start=\"654\" data-end=\"672\"\u003eKey Features\u003c\/h3\u003e\n\u003cp data-start=\"673\" data-end=\"1094\"\u003e • \u003cstrong data-start=\"676\" data-end=\"707\"\u003eFits 75–115HP 3-Cyl OptiMax\u003c\/strong\u003e – Plus several V6 two-stroke Mercury and Mariner models.\u003cbr data-start=\"764\" data-end=\"767\"\u003e • \u003cstrong data-start=\"770\" data-end=\"798\"\u003eStrong, Consistent Spark\u003c\/strong\u003e – Helps clear up misfires and hesitation.\u003cbr data-start=\"840\" data-end=\"843\"\u003e • \u003cstrong data-start=\"846\" data-end=\"868\"\u003eMarine-Ready Build\u003c\/strong\u003e – Handles heat, moisture, and constant shaking without giving up early.\u003cbr data-start=\"940\" data-end=\"943\"\u003e • \u003cstrong data-start=\"946\" data-end=\"968\"\u003eOEM-Grade Windings\u003c\/strong\u003e – Reduces random spark dropouts and cross-fire issues.\u003cbr data-start=\"1023\" data-end=\"1026\"\u003e • \u003cstrong data-start=\"1029\" data-end=\"1049\"\u003eBolts On Cleanly\u003c\/strong\u003e – No weird wiring tricks or adapters needed.\u003c\/p\u003e\n\u003chr data-start=\"1096\" data-end=\"1099\"\u003e\n\u003ch3 data-start=\"1101\" data-end=\"1134\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h3\u003e\n\u003cp data-start=\"1135\" data-end=\"1293\"\u003e • 75–115HP Mercury OptiMax (3-cyl)\u003cbr data-start=\"1170\" data-end=\"1173\"\u003e • Mercury\/Mariner V6 2-stroke outboards (various models)\u003cbr data-start=\"1230\" data-end=\"1233\"\u003e • MerCruiser 600Sci\u003cbr data-start=\"1253\" data-end=\"1256\"\u003e • EFI and OptiMax ignition systems\u003c\/p\u003e\n\u003chr data-start=\"1295\" data-end=\"1298\"\u003e\n\u003ch3 data-start=\"1300\" data-end=\"1338\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1339\" data-end=\"1694\"\u003eA fresh coil can make the motor feel a whole lot more settled. Idle cleans up, throttle response gets sharper, and the engine doesn’t lose a cylinder the moment you ask for some power. These engines rely on a crisp, steady spark—when one coil gets weak, the whole motor acts tired. Swapping in a good OEM coil usually brings that snap and confidence back.\u003c\/p\u003e\n\u003chr data-start=\"1696\" data-end=\"1699\"\u003e\n\u003ch3 data-start=\"1701\" data-end=\"1718\"\u003eWhy Buy OEM\u003c\/h3\u003e\n\u003cp data-start=\"1719\" data-end=\"1961\"\u003eMarine ignition parts deal with more heat and moisture than automotive coils ever see. OEM coils last longer, fit right, and don’t cause the strange intermittent misses that cheaper coils are known for. You install it once, and it just works.\u003c\/p\u003e\n\u003chr data-start=\"1963\" data-end=\"1966\"\u003e\n\u003ch3 data-start=\"1968\" data-end=\"1977\"\u003eFAQ\u003c\/h3\u003e\n\u003cp data-start=\"1978\" data-end=\"2113\"\u003e\u003cstrong data-start=\"1978\" data-end=\"2021\"\u003eQ1: How do I know the coil’s going bad?\u003c\/strong\u003e\u003cbr data-start=\"2021\" data-end=\"2024\"\u003e\u003cstrong data-start=\"2024\" data-end=\"2030\"\u003eA:\u003c\/strong\u003e A miss at idle, rough running, hard starts, or the engine falling flat under load.\u003c\/p\u003e\n\u003cp data-start=\"2115\" data-end=\"2269\"\u003e\u003cstrong data-start=\"2115\" data-end=\"2161\"\u003eQ2: Should I replace just one or do a set?\u003c\/strong\u003e\u003cbr data-start=\"2161\" data-end=\"2164\"\u003e\u003cstrong data-start=\"2164\" data-end=\"2170\"\u003eA:\u003c\/strong\u003e If the others are the same age, replacing them together saves you from another failure soon after.\u003c\/p\u003e\n\u003cp data-start=\"2271\" data-end=\"2381\"\u003e\u003cstrong data-start=\"2271\" data-end=\"2303\"\u003eQ3: Is this a tough install?\u003c\/strong\u003e\u003cbr data-start=\"2303\" data-end=\"2306\"\u003e\u003cstrong data-start=\"2306\" data-end=\"2312\"\u003eA:\u003c\/strong\u003e Not really—just match the wiring and bolt it down. Basic tools only.\u003c\/p\u003e\n\u003cp data-start=\"2383\" data-end=\"2513\"\u003e\u003cstrong data-start=\"2383\" data-end=\"2433\"\u003eQ4: Will this help with sluggish acceleration?\u003c\/strong\u003e\u003cbr data-start=\"2433\" data-end=\"2436\"\u003e\u003cstrong data-start=\"2436\" data-end=\"2442\"\u003eA:\u003c\/strong\u003e Yes. Weak coils often show up most when the engine is working hardest.\u003c\/p\u003e\n\u003cp data-start=\"2515\" data-end=\"2621\"\u003e\u003cstrong data-start=\"2515\" data-end=\"2536\"\u003eQ5: Saltwater ok?\u003c\/strong\u003e\u003cbr data-start=\"2536\" data-end=\"2539\"\u003e\u003cstrong data-start=\"2539\" data-end=\"2545\"\u003eA:\u003c\/strong\u003e Yep—this coil is built for the damp, hot, always-moving marine environment.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46940749725987,"sku":"300-879984T01","price":165.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV498843_12.jpg?v=1698814304","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-ignition-coil-300-879984t01","provider":"PartsVu","version":"1.0","type":"link"}