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Mercury SmartCraft SC1000 installation

Old 05-18-2008, 01:41 PM
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Default Mercury SmartCraft SC1000 installation

Need some help installing a new set of SmartCraft sc1000 gauges. Recently re-powered with a pair of 2002 Mercury Opti's and am now trying to install a new set of gauges to go with the engines. Having read the 4-page installation manual that came with the gauges and browsing the Mercury website to no end, I can't figure out how to intace the engines to the gauges. The main engine harnesses (new) have a 5-pin round connector labeled "tach" which I thought would just plug into the Smartcraft junction box (has 4 ports, each sqaure with 8 or so pins)but it does not. I have the gauges (2 tachs and 1 speedo) connected to 3 ports of the 4 port junction box. Now what? My guess at this stage is that I'm missing cables that probably has to run back to the engines (nb: engines were previously connected with older analog tachs wired into engines harness) or maybe there is some sort of adapter that uses the 5-pin round connector on my new engines harnesses and plugs into the junction box. Will the 4 port junction box work in my dual engine set-up or do I need to replace with a 6-port box? I'd be grateful to have any help that can be offered. Thanks
Old 05-18-2008, 02:57 PM
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Default Re: Mercury SmartCraft SC1000 installation

Call or email Merc via their standard support protocol listed on their web site (be sur eyo have you engine serial numbers ready and include them) and Merc support should be able to help you get everything hooked up correctly. They were very helpful to me.

You probably need the gauge connection from the key/choke harness connecting to the 4-way junction box, and the SC gauges also hooked into the 4-way. You cannot have any open connection on the junction box and may need a weather cap or terminator to cap an open port on the junction box.
Old 05-18-2008, 06:26 PM
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Default Re: Mercury SmartCraft SC1000 installation

Coming off the engine should be an open connecter that you will need to connect a cable from there to your junction box. You have to order the cable to the length you need, ebay is a great place for that. You might have to have more than one junction box since you have so many gauges and two engines. I think the cable from the engine is a 10 pin connector. It should have a weather proof cap on it. Mine was tucked under the starboard side of the engine block. If you buy a service manual from Mercury it will show you a wiring diagram of how it all plugs together. It really is simple once you get the right cables. It's as easy as plugging a telephone into a wall.


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