{"product_id":"johnson-evinrude-adapter-harness-for-1996-2016-engines-to-1976-1995-controls-sierra-18-99402-cdi-423-6349-18-in-marine-wiring-adapter","title":"Sierra Johnson\/Evinrude Engine Wiring Adapter Harness 18-99402, Adapts 1996-2016 Engines to 1976-1995 Controls","description":"\u003cp\u003eThe Sierra 18-99402 is a wiring adapter harness built to bridge the electrical connection between newer Johnson and Evinrude outboard engines and older control systems. It allows an owner running a 1996-2016 Johnson or Evinrude engine to connect that engine to controls built for the 1976-1995 era, avoiding a full rewire or control-box replacement when upgrading or swapping a powerhead. The harness is designed for use in a marine environment, with connectors and wiring sized to handle the vibration, moisture, and temperature swings typical of an outboard engine compartment.\u003c\/p\u003e\u003cp\u003eAt 18 inches long, the harness is sized to route between the engine's wiring loom and the boat's existing control harness without excess slack. Because engine and control wiring configurations vary by model and production year, Sierra recommends checking the specific part numbers recommended for your engine and control setup before ordering to confirm a proper fit. This adapter is a Sierra 18-99402, part of Sierra's line of Evinrude outboard electrical system components.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99402\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Electrical System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarness Length:\u003c\/strong\u003e 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engines:\u003c\/strong\u003e 1996-2016 Johnson and Evinrude outboard engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdapts To Controls:\u003c\/strong\u003e 1976-1995 Johnson\/Evinrude control systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394837\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude outboard engines, 1996-2016, adapting to 1976-1995 control systems\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99402 adapter harness do?\u003c\/strong\u003e It connects a 1996-2016 Johnson or Evinrude outboard engine's wiring to a control system built for the 1976-1995 era, so the two can communicate without rewiring the boat's controls.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long is the harness?\u003c\/strong\u003e The Sierra 18-99402 harness measures 18 inches, sized to route between the engine wiring loom and the boat's existing control harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99402 weigh?\u003c\/strong\u003e It weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this harness fit any Johnson or Evinrude engine?\u003c\/strong\u003e It is designed for 1996-2016 Johnson and Evinrude engines being adapted to 1976-1995 controls; Sierra recommends checking the part numbers recommended for your specific engine and control combination before ordering to confirm a proper fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this harness to connect an older control box to a newer outboard?\u003c\/strong\u003e Yes, that is the harness's purpose: adapting a newer (1996-2016) Johnson\/Evinrude engine so it can work with an older (1976-1995) control system, which is useful when a powerhead is upgraded but the boat's controls are kept.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99402 rated for marine environments?\u003c\/strong\u003e Yes, the harness is built for use in a marine environment, where it is exposed to moisture, vibration, and temperature changes typical of an outboard engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99402 include connectors on both ends?\u003c\/strong\u003e The harness is a complete adapter cable intended to plug in between the engine wiring and the boat's control wiring; check your engine and control part numbers against Sierra's fitment guidance to confirm connector compatibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this part?\u003c\/strong\u003e The UPC for the Sierra 18-99402 wiring adapter harness is 808282394837.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need any other parts to use this harness?\u003c\/strong\u003e No additional parts are specified; the 18-99402 is installed inline between the existing engine wiring and control wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this harness only for Johnson and Evinrude engines?\u003c\/strong\u003e Yes, the Sierra 18-99402 is built specifically to adapt Johnson and Evinrude engine wiring to Johnson\/Evinrude control systems.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988442984667,"sku":"SIE-18-99402","price":158.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-423-6349_lg__81441.1558111549.500.750.jpg?v=1785188923","url":"https:\/\/www.goodvibesmarina.com\/products\/johnson-evinrude-adapter-harness-for-1996-2016-engines-to-1976-1995-controls-sierra-18-99402-cdi-423-6349-18-in-marine-wiring-adapter","provider":"Good Vibes Marina","version":"1.0","type":"link"}