Quote:
Originally Posted by AnthonyAllen72
I have another question in relation to the above wiring diagrams. Where do the gauges come in to play?? (Oil,speedometer,battery level,etc.) Are they run directly from the Outboard Motor via a harness?? I think if I could figure that out I will be going in the right direction.
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Most older outboards have wiring on their harness to connect gauges. Yours has a 2.5 150 merc so you will have (or need) a sub harness for your gauges. The gauge harness plugs into the main harness that comes up to the key switch. You will have to loop the power (+) and grounds (-) to the gauges but the signal wire to each gauge should come off of the outboard harness. I have a factory manual and can email you the diagram showing the color code for what wire goes to what gauge. You probably can find it online also.
Far as the speedo will connect to a hose off of the lower unit and works off water pressure. They suck and a gps speedo is more accurate. Most speedo kits also come with a rear mounted pick up that goes on the transom to pickup water pressure also (junk as well) I use the speed off the chart plotter but if you want a gauge go for the gps type.