Originally Posted by
Rubberhead*
There's a couple of things - voltage drop is one. Any reasonable gauge wire will still increase the likelyhood that a dying battery can't start the motor. If something goes wrong with radio, depth finder or nav lights, I can still get home.
Something going wrong with the charging system will usually cut a trip short. Something going wrong with the starting system and the trip will usually run way, way longer than planned. I try to keep everything I need in easy to get to places and make connections as perfect as possible and runs as short as possible. I even plan to have to unhook the motor's leads from the boat and connect them directly to a battery to get me started.
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