Get your wire from genuinedealz.com. I saw someone post about it a year out so ago and bought from them. Much cheaper than Anchor for the same spec marine grade wire made in Massachusetts if I remember right.
Well, you should shop around: Sailnet, Genuinedealz and Gregs Marine. I'll bet Greg's will have better prices. I am not connected, just a customer.
Basic Battery Wiring Diagrams This is a very good basic primer for boat system wiring: Basic Battery Wiring Diagrams
This is another very good basic primer for boat system wiring: The 1-2-B Switch by Maine Sail (brings together a lot of what this subject is all about)
1/BOTH/2/OFF Switches Thoughts & Musings - SailboatOwners.com
Only difference for you with an outboard is that the negative for your boat is the battery (-) not the engine.
++1 on that
I am half way thru my rewiring project using the learnings I got here and from electrical handbooks from Charlie Wing (highly recommended) and Don Casey.
The trick? plan, plan, plan, do.
1) Draft a diagram based on Stu's links above.
2) Measure all the wire distances taking the wire runs up and downs around furniture into account.
2) Make a list of wire sizes (depends on the distances X 2) and colors
3) Shop around:
- For wires
- For connectors and heat-shrink
- For a crimping tool (Pro's kit was the most cost effective for my project)
- A good stripper and wire cutter
- Bus bars
5) Get moving.
Best of luck