{"product_id":"858740t4-mercury-harness-genuine-used-part","title":"858740T4 Mercury Harness | Genuine Used Part","description":"\u003cp\u003e\n 🔧 Product Description\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Genuine Mercury Harness Assembly - Part Number: 858740T4\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n A genuine Mercury harness assembly used as an adapter harness in Mercury to Yamaha-style rigging \/ electrical conversion applications. This harness links compatible Mercury engine or control-system connectors to the matching Yamaha-style connection layout where the 858740T4 harness is specified.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n ⚙️ Key Features\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Genuine Mercury harness assembly\n\u003c\/p\u003e\n\u003cp\u003e\n • Correct Mercury part number 858740T4\n\u003c\/p\u003e\n\u003cp\u003e\n • Adapter harness for Mercury to Yamaha-style connection applications\n\u003c\/p\u003e\n\u003cp\u003e\n • OEM Mercury factory harness assembly\n\u003c\/p\u003e\n\u003cp\u003e\n • Fitment depends on plug type, engine rigging and control-system layout\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🔄 Supersession \u0026amp; Cross Reference\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n OEM Supersession Chain:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • 858740T4 current \/ listed Mercury harness assembly reference\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n OEM \/ Related Numbers:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • 858740T4\n\u003c\/p\u003e\n\u003cp\u003e\n • 84-858740T4\n\u003c\/p\u003e\n\u003cp\u003e\n • 858740\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury to Yamaha adapter harness reference\n\u003c\/p\u003e\n\u003cp\u003e\n • Related rigging harness family reference\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Aftermarket \/ Verified Equivalents:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • No aftermarket equivalent\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🚤 Compatibility\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Commonly used on:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury to Yamaha adapter harness installations\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Typically suits:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine \/ rigging applications:\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury engine installations requiring Yamaha-style adapter connection\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 14-pin to Yamaha-style rigging conversion applications where 858740T4 is specified\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury remote-control or instrumentation conversion setups using 858740T4\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury \/ Yamaha shared rigging interface applications matched by plug layout\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • HP Range: rigging-dependent\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine Type: Mercury outboard rigging harness system\n\u003c\/p\u003e\n\u003cp\u003e\n • System Type: Adapter harness assembly\n\u003c\/p\u003e\n\u003cp\u003e\n • Serial Note: Harness fitment is plug- and rigging-specific. Match by exact engine serial number, control type, connector count and pin layout.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🔌 Function\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n The harness adapts electrical control or instrumentation circuits between compatible Mercury and Yamaha-style plug systems.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Common signs of failure:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • No communication between control harness and engine\n\u003c\/p\u003e\n\u003cp\u003e\n • Intermittent gauge or warning function\n\u003c\/p\u003e\n\u003cp\u003e\n • Trim, start or key-switch circuit not operating\n\u003c\/p\u003e\n\u003cp\u003e\n • Corroded or damaged pins\n\u003c\/p\u003e\n\u003cp\u003e\n • Broken wire continuity inside harness\n\u003c\/p\u003e\n\u003cp\u003e\n • Fault changes when harness is moved\n\u003c\/p\u003e\n\u003cp\u003e\n • Incorrect adapter harness fitted to rigging system\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 📦 Condition\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Genuine used part\n\u003c\/p\u003e\n\u003cp\u003e\n • Removed from running engine where applicable\n\u003c\/p\u003e\n\u003cp\u003e\n • In good working condition unless otherwise stated\n\u003c\/p\u003e\n","brand":"Sawley's Auto and Marine","offers":[{"title":"Default Title","offer_id":53392323215652,"sku":"X342500","price":120.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_c6bb5786-d3f5-4a61-97e7-235d56542372.jpg?v=1777432786","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/858740t4-mercury-harness-genuine-used-part","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}