PaulRainbow
Well-known member
I'm not sure of its size but it is thinner. So you're right it will not be protected but we need the amps for the starter motor. I suspect it is wired that way around for precisely that reason.
It's alost unheard of on a boat for the short wire between the alternator and the starter negative to be fused and this has been the case since alternators were invented. Just make sure it is well supported and cannot chafe.