Be aware, There are different pin-outs for the cannon plugs, different number of pins depending on the vintage of the cable. New wiring harnesses are available, even on Ebay, complete with the cannon plug molded onto the wires, much better than trying to splice onto the old cannon plug. I've only done this for accessories, not sure I would do it on something as important as the engine harness. It's not the best, but at least you will have a permanent mark on the wire and can tell it apart from other wires of the same color. Cut up 1/2" pieces of white, red or black (etc.) and shrink it onto the wire every 4-6". (.Not that I'm suggesting it.) Something I have done in the past to differentiate wire runs of the same colored wire is to use colored heat shrink tubing. Look at as they have pretty good prices on marine wiring in different colors and gauges. Anything you use to mark the wires can fall/wear off over time and then you are stuck with a bunch of unmarked wires. Spend the extra $$$ and get the correct colored wire, in the proper gauge. What gauge is that wire? The engine harness has wire from #10 to #16 (?) and you want to follow what's there. and put the label on both ends of the wire (at the motor and under the console). To remedy this, I thought about getting a label maker and either use the colored labels that match the original color of the wire, or just write the color(s) on the labels so it will be easier to follow the factory wiring diagrams in the future or if I ever sell the boat. The only thing I'm concerned about is that the new wires obviously won't be of the original color codes. Does that make any sense? I'm wondering if this idea is ok, or should I be doing this a different way? Even if I could find a brand new wiring harness for this old motor, it's $$, and I believe I can do it just as well myself. The house side is no problem, but what I'm wanting to do for the engine side is take the wires where they come out of the wiring harness hookup on the motor (the big round plug with the clamp) and leave about 8-10inches and cut the rest, then take new wires of the same awg and splice them in with polyolephin butt connectors to the original wires so I can have a fresh pieces of wire running to the console. What I want to do is have all fresh wiring in the boat on both the house and the engine side. I'm working on a boat that is from 1978-1980 (not sure yet) so the wiring is obviously in rough shape. Hey guys, my rebuild is getting close to the time to run some wires (finally!).
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