{"product_id":"mercruiser-remote-starter-test-harness-2006-and-older-sierra-18-99561-marine-engine-cranking-tool","title":"CDI Electronics Remote Starter Test Harness 18-99561 for Mercruiser Engines, 2006 and Older","description":"\u003cp\u003eThe CDI Electronics Remote Starter Test Harness, part number 18-99561, is a diagnostic tool built for bench-testing and remote-starting Mercruiser stern drive and inboard engines outside of the boat. It lets marine technicians and DIY boat owners crank and run an engine on a test stand or in the shop without needing the boat's factory ignition switch, wiring harness, or dash-mounted controls connected. This makes it a practical addition to any marine repair bay, allowing quick verification that an engine starts, runs, and responds correctly after service work such as carburetor rebuilds, ignition repairs, fuel pump replacement, or engine swaps.\u003c\/p\u003e\u003cp\u003eBecause it bypasses the boat's normal wiring, the harness speeds up troubleshooting by isolating the engine and its ignition system from the vessel's electrical system, helping technicians confirm whether a no-start or rough-running issue originates with the engine itself or with the boat's wiring and controls. It is designed for use with Mercruiser engines built through 2006, covering the older generation of Mercruiser ignition and starting systems.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e CDI Electronics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99561\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Remote Starter Test Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine Brand:\u003c\/strong\u003e Mercruiser\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Model Years:\u003c\/strong\u003e 2006 and older\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 pound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282395506\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser engines, 2006 and older\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the CDI Electronics Remote Starter Test Harness 18-99561 used for?\u003c\/strong\u003e It is a diagnostic harness that lets you crank and start a Mercruiser engine outside the boat, bypassing the factory ignition switch and dash wiring so you can bench-test or troubleshoot the engine directly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines does part number 18-99561 fit?\u003c\/strong\u003e The 18-99561 test harness is designed for Mercruiser engines built in 2006 and older.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this harness work on newer Mercruiser engines built after 2006?\u003c\/strong\u003e No, the 18-99561 harness is intended for Mercruiser engines from 2006 and older; newer engines with different ignition and control wiring are not covered.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the CDI Electronics 18-99561 test harness weigh?\u003c\/strong\u003e The remote starter test harness weighs 1 pound.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to disconnect my boat's dash wiring to use this harness?\u003c\/strong\u003e Yes, the purpose of the 18-99561 harness is to bypass the boat's normal ignition switch and dash controls so the engine can be started and run independently of the vessel's wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine CDI Electronics part or an aftermarket copy?\u003c\/strong\u003e The 18-99561 is sold as a CDI Electronics branded remote starter test harness, not a generic aftermarket copy.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this harness help diagnose a no-start problem?\u003c\/strong\u003e Yes, by isolating the engine's starting and ignition circuits from the boat's wiring, the 18-99561 harness helps determine whether a no-start issue is caused by the engine or by the boat's electrical system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99561 harness meant for professional mechanics only?\u003c\/strong\u003e It is commonly used by marine technicians in a shop setting, but boat owners comfortable with engine wiring can also use the CDI Electronics 18-99561 harness for bench testing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes with the CDI Electronics remote starter test harness?\u003c\/strong\u003e The product is the 18-99561 remote starter test harness itself, used to crank and run a compatible Mercruiser engine outside the boat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill part number 18-99561 work on inboard and stern drive Mercruiser engines?\u003c\/strong\u003e The 18-99561 test harness is built for Mercruiser engines from 2006 and older; specific inboard versus stern drive distinctions are not specified beyond that engine coverage.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988446949595,"sku":"SIE-18-99561","price":233.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-511-7950_lg__36938.1558114371.500.750.jpg?v=1785189065","url":"https:\/\/www.goodvibesmarina.com\/products\/mercruiser-remote-starter-test-harness-2006-and-older-sierra-18-99561-marine-engine-cranking-tool","provider":"Good Vibes Marina","version":"1.0","type":"link"}