{"product_id":"mercury-harn-inner-70-84-8m0173576","title":"Mercury – Inner Helm Extension Harness | 70-Foot Extension | 84-8M0173576","description":"\u003cp data-start=\"0\" data-end=\"77\"\u003e\u003cstrong data-start=\"0\" data-end=\"77\"\u003eMercury – Inner Helm Extension Harness | 70-Foot Extension | 84-8M0173576\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"79\" data-end=\"82\"\u003e\n\u003cp data-start=\"84\" data-end=\"581\"\u003e\u003cstrong data-start=\"84\" data-end=\"96\"\u003eOverview\u003c\/strong\u003e\u003cbr data-start=\"96\" data-end=\"99\"\u003eThis 70-foot inner-engine extension harness is meant for large triple- and quad-engine boats where the standard harness doesn’t come close to reaching the inner engines cleanly. Long routing paths, wide transoms, and deep rigging channels can make shorter runs feel tight or forced. This length lets the wiring relax into a smooth, natural route so the controls stay steady and predictable. On big offshore hulls, that extra reach makes rigging and later service a lot less painful.\u003c\/p\u003e\n\u003chr data-start=\"583\" data-end=\"586\"\u003e\n\u003cp data-start=\"588\" data-end=\"1093\"\u003e\u003cstrong data-start=\"588\" data-end=\"604\"\u003eKey Features\u003c\/strong\u003e\u003cbr data-start=\"604\" data-end=\"607\"\u003e    • \u003cstrong data-start=\"633\" data-end=\"654\"\u003e70-Foot Extension\u003c\/strong\u003e – Built for the longest inner-engine runs.\u003cbr data-start=\"697\" data-end=\"700\"\u003e    • \u003cstrong data-start=\"726\" data-end=\"746\"\u003eInner-Engine Use\u003c\/strong\u003e – For inner engines on triple and quad DTS setups.\u003cbr data-start=\"797\" data-end=\"800\"\u003e    • \u003cstrong data-start=\"826\" data-end=\"844\"\u003eOEM Connectors\u003c\/strong\u003e – Factory ends that snap in securely.\u003cbr data-start=\"882\" data-end=\"885\"\u003e    • \u003cstrong data-start=\"911\" data-end=\"931\"\u003eFlexible Routing\u003c\/strong\u003e – Helps avoid harsh bends and squeezed-in wiring.\u003cbr data-start=\"981\" data-end=\"984\"\u003e    • \u003cstrong data-start=\"1010\" data-end=\"1034\"\u003eReliable Signal Path\u003c\/strong\u003e – Keeps throttle and shift communication clean and steady.\u003c\/p\u003e\n\u003chr data-start=\"1095\" data-end=\"1098\"\u003e\n\u003cp data-start=\"1100\" data-end=\"1268\"\u003e\u003cstrong data-start=\"1100\" data-end=\"1131\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003cbr data-start=\"1131\" data-end=\"1134\"\u003e    • Triple engine\u003cbr data-start=\"1173\" data-end=\"1176\"\u003e    • Quad engine\u003cbr data-start=\"1213\" data-end=\"1216\"\u003e    • Inner-engine helm pathways\u003c\/p\u003e\n\u003chr data-start=\"1270\" data-end=\"1273\"\u003e\n\u003cp data-start=\"1275\" data-end=\"1697\"\u003e\u003cstrong data-start=\"1275\" data-end=\"1311\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/strong\u003e\u003cbr data-start=\"1311\" data-end=\"1314\"\u003eWith this much extra length, the harness can follow an easy route instead of getting jammed through tight corners. That usually means smoother throttle and shift feel because the wiring isn’t kinked or strained. It also frees up space in the rigging bay, making inspections and service less of a wrestling match. On wide or deep boats, the difference in day-to-day use is noticeable.\u003c\/p\u003e\n\u003chr data-start=\"1699\" data-end=\"1702\"\u003e\n\u003cp data-start=\"1704\" data-end=\"1985\"\u003e\u003cstrong data-start=\"1704\" data-end=\"1719\"\u003eWhy Buy OEM\u003c\/strong\u003e\u003cbr data-start=\"1719\" data-end=\"1722\"\u003eOEM wiring holds up to vibration, heat, and saltwater far better than generic harnesses. The connectors match Mercury’s design exactly, which helps prevent loose plugs and odd control glitches. It’s reliable, long-lasting rigging built for real marine conditions.\u003c\/p\u003e\n\u003chr data-start=\"1987\" data-end=\"1990\"\u003e\n\u003cp data-start=\"1992\" data-end=\"2174\"\u003e\u003cstrong data-start=\"1992\" data-end=\"1999\"\u003eFAQ\u003c\/strong\u003e\u003cbr data-start=\"1999\" data-end=\"2002\"\u003e\u003cstrong data-start=\"2002\" data-end=\"2050\"\u003eQ1: How do I know I need the 70-foot option?\u003c\/strong\u003e\u003cbr data-start=\"2050\" data-end=\"2053\"\u003eA: If shorter inner-engine extensions still feel tight or won’t reach cleanly, this is the length that usually solves it.\u003c\/p\u003e\n\u003cp data-start=\"2176\" data-end=\"2254\"\u003e\u003cstrong data-start=\"2176\" data-end=\"2216\"\u003eQ2: Any setup or calibration needed?\u003c\/strong\u003e\u003cbr data-start=\"2216\" data-end=\"2219\"\u003eA: No—just plug it in and route it.\u003c\/p\u003e\n\u003cp data-start=\"2256\" data-end=\"2370\"\u003e\u003cstrong data-start=\"2256\" data-end=\"2293\"\u003eQ3: Is it safe for saltwater use?\u003c\/strong\u003e\u003cbr data-start=\"2293\" data-end=\"2296\"\u003eA: Yes. Give it a rinse once in a while and keep an eye on the connectors.\u003c\/p\u003e\n\u003cp data-start=\"2372\" data-end=\"2472\"\u003e\u003cstrong data-start=\"2372\" data-end=\"2402\"\u003eQ4: Any installation tips?\u003c\/strong\u003e\u003cbr data-start=\"2402\" data-end=\"2405\"\u003eA: Use wide, gentle curves and avoid rubbing points along the hull.\u003c\/p\u003e\n\u003cp data-start=\"2474\" data-end=\"2605\"\u003e\u003cstrong data-start=\"2474\" data-end=\"2511\"\u003eQ5: What are early signs of wear?\u003c\/strong\u003e\u003cbr data-start=\"2511\" data-end=\"2514\"\u003eA: Hesitant controls, intermittent signals, or areas where the jacket is starting to scuff.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46935983391011,"sku":"84-8M0173576","price":505.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV803006.jpg?v=1720534799","url":"https:\/\/partsvu.com\/en-au\/products\/mercury-harn-inner-70-84-8m0173576","provider":"PartsVu","version":"1.0","type":"link"}