{"product_id":"mercury-harness-extension-mp-alert-50ft-84-8m0054187","title":"Mercury – MP Alert Harness Extension | 50-Foot Forward Routing Cable | 84-8M0054187","description":"\u003cp data-start=\"0\" data-end=\"87\"\u003e\u003cstrong data-start=\"0\" data-end=\"87\"\u003eMercury – MP Alert Harness Extension | 50-Foot Forward Routing Cable | 84-8M0054187\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"89\" data-end=\"92\"\u003e\n\u003cp data-start=\"94\" data-end=\"106\"\u003e\u003cstrong data-start=\"94\" data-end=\"106\"\u003eOverview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"108\" data-end=\"578\"\u003eSome boats need the MP Alert warning lights positioned far forward—well beyond the reach of standard rigging lengths. The Mercury 84-8M0054187 MP Alert Harness Extension gives you \u003cstrong data-start=\"288\" data-end=\"299\"\u003e50 feet\u003c\/strong\u003e of cable, making it the longest forward-routing option available for MP Alert installations. With this harness, you can mount a Moving Prop Alert light near the bow or along extended deck areas so swimmers, guests, and riders see the warning long before they approach the stern.\u003c\/p\u003e\n\u003chr data-start=\"580\" data-end=\"583\"\u003e\n\u003cp data-start=\"585\" data-end=\"601\"\u003e\u003cstrong data-start=\"585\" data-end=\"601\"\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"605\" data-end=\"718\"\u003e\n\u003cstrong data-start=\"605\" data-end=\"628\"\u003e50-Foot Extension –\u003c\/strong\u003e Maximum-length harness for boats with long rigging runs or distant bow light locations.\u003c\/li\u003e\n\u003cli data-start=\"721\" data-end=\"826\"\u003e\n\u003cstrong data-start=\"721\" data-end=\"748\"\u003ePlug-and-Play OEM Fit –\u003c\/strong\u003e Uses Mercury SmartCraft-grade connectors for a direct, reliable connection.\u003c\/li\u003e\n\u003cli data-start=\"829\" data-end=\"942\"\u003e\n\u003cstrong data-start=\"829\" data-end=\"861\"\u003eExpanded Safety Visibility –\u003c\/strong\u003e Allows MP Alert lights to be mounted well forward for early swimmer awareness.\u003c\/li\u003e\n\u003cli data-start=\"945\" data-end=\"1070\"\u003e\n\u003cstrong data-start=\"945\" data-end=\"978\"\u003eFlexible Routing Capability –\u003c\/strong\u003e Long enough to pass through bulkheads, under decks, and along full-length rigging chases.\u003c\/li\u003e\n\u003cli data-start=\"1073\" data-end=\"1197\"\u003e\n\u003cstrong data-start=\"1073\" data-end=\"1106\"\u003eMarine-Durable Construction –\u003c\/strong\u003e Sealed cable and connectors designed to handle spray, vibration, and harsh environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1199\" data-end=\"1202\"\u003e\n\u003cp data-start=\"1204\" data-end=\"1221\"\u003e\u003cstrong data-start=\"1204\" data-end=\"1221\"\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1225\" data-end=\"1286\"\u003eAll Mercury MP Alert systems using \u003cstrong data-start=\"1260\" data-end=\"1284\"\u003eoval MP Alert lights\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1289\" data-end=\"1320\"\u003eSmartCraft-compatible engines\u003c\/li\u003e\n\u003cli data-start=\"1323\" data-end=\"1401\"\u003eMP Alert add-on lights, Y-harness expansion setups, and cowl-mounted options\u003c\/li\u003e\n\u003cli data-start=\"1404\" data-end=\"1469\"\u003eBoats requiring extended bow- or deck-mounted MP Alert lighting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1471\" data-end=\"1474\"\u003e\n\u003cp data-start=\"1476\" data-end=\"1512\"\u003e\u003cstrong data-start=\"1476\" data-end=\"1512\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1514\" data-end=\"1966\"\u003eThis 50-foot harness lets you position a Moving Prop Alert light as far forward as needed—ideal for pontoons, long center consoles, cruisers, or boats with raised bow areas. The extra reach keeps the wiring tidy and prevents strain, while the MP Alert system itself continues to work automatically. Once connected, the added light flashes any time the prop is spinning, giving swimmers and riders a clear warning from more angles and greater distances.\u003c\/p\u003e\n\u003chr data-start=\"1968\" data-end=\"1971\"\u003e\n\u003cp data-start=\"1973\" data-end=\"1988\"\u003e\u003cstrong data-start=\"1973\" data-end=\"1988\"\u003eWhy Buy OEM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1990\" data-end=\"2411\"\u003eFor safety systems like MP Alert, clean signal transfer and watertight connections matter. Mercury’s OEM harness matches the electrical requirements of the MP Alert controller and ensures the added light operates with the correct timing and brightness. Cheaper aftermarket extensions often loosen, corrode, or cause intermittent light behavior—but the factory harness is built and sealed for long-term marine reliability.\u003c\/p\u003e\n\u003chr data-start=\"2413\" data-end=\"2416\"\u003e\n\u003cp data-start=\"2418\" data-end=\"2425\"\u003e\u003cstrong data-start=\"2418\" data-end=\"2425\"\u003eFAQ\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2427\" data-end=\"2615\"\u003e\u003cstrong data-start=\"2427\" data-end=\"2475\"\u003eQ1: When is the 50-foot extension necessary?\u003c\/strong\u003e\u003cbr data-start=\"2475\" data-end=\"2478\"\u003eWhen you need to mount an MP Alert light far forward—common on large pontoons, long walkaround rigs, or boats with expansive upper decks.\u003c\/p\u003e\n\u003cp data-start=\"2617\" data-end=\"2768\"\u003e\u003cstrong data-start=\"2617\" data-end=\"2672\"\u003eQ2: Will this change how the MP Alert system works?\u003c\/strong\u003e\u003cbr data-start=\"2672\" data-end=\"2675\"\u003eNo. It only extends the wiring; the system still activates automatically when the prop moves.\u003c\/p\u003e\n\u003cp data-start=\"2770\" data-end=\"2880\"\u003e\u003cstrong data-start=\"2770\" data-end=\"2822\"\u003eQ3: Can this be used with Y-harness add-on kits?\u003c\/strong\u003e\u003cbr data-start=\"2822\" data-end=\"2825\"\u003eYes. It works seamlessly with all expansion components.\u003c\/p\u003e\n\u003cp data-start=\"2882\" data-end=\"2989\"\u003e\u003cstrong data-start=\"2882\" data-end=\"2934\"\u003eQ4: Is this compatible with cowl-mounted lights?\u003c\/strong\u003e\u003cbr data-start=\"2934\" data-end=\"2937\"\u003eYes. Any oval MP Alert light can use this extension.\u003c\/p\u003e\n\u003cp data-start=\"2991\" data-end=\"3130\"\u003e\u003cstrong data-start=\"2991\" data-end=\"3025\"\u003eQ5: Is installation difficult?\u003c\/strong\u003e\u003cbr data-start=\"3025\" data-end=\"3028\"\u003eNo. Plug it into the MP Alert harness and route it like any long cable run—secure with clamps or ties.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46936018911523,"sku":"84-8M0054187","price":59.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/84-8m005418_3.jpg?v=1698795787","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-harness-extension-mp-alert-50ft-84-8m0054187","provider":"PartsVu","version":"1.0","type":"link"}