Go to
www.go-fast.com and do the parts search->search with pictures-> and keep selecting your engine type, model, serial number range. When you get to the main parts breakout there's a selection for service/support material. The main list stays in the upper left corner, the exploded diagram at the top of the page, and the parts breakout and cost at the bottom window. The service manual for a 350Mag Horizon was listed at $67.85 and change. The sternleg manual was about the same.
I started with analog gauges since those were in the boat I bought and it was simple to plug in to the big round connector on the back of the engine. The I bought a monitor for the fuel use info. Then I had a buddy give me a Smartsystem Tach so I went out and got a Smartsystem Speedo and the link gauge for temp, oil and batt. Getting a tank gauga and digital trim gauge was more trouble than I though it was worth as it required new tank sender and trim switches. The guages are awesome and easy to connect.
The main thing is to get the right cables. The cables can either connect directly to an end device like the Monitor or the engine, or to a Hub. With a single engine you need the terminated cable and it just connects to a connector on the back of the engine near the analog connector. That cable goes forward and connects into the back of the Monitor Guage if it's terminated on that end, or you can connect the cable into a Hub, and then use a different short cable to go to the guage. For multiple engine you can have a Hub on each end of the boat and connect all the engines to the one in the back, and all the guages to the one in the front. So the layout is really easy....you just have to kow what cables. With the Speedo/Tach they each connect to the hub and then the oil, batt and temp gauge daisy chain with a two wire connector. Talk about eliminating wiring.
And while I haven't met you I've seen you post on the board many times so I kind of know you...
