Yamaha wiring harness

Joined
Mar 22, 2009
Messages
16
While redoing my gauges in my 1997 S150TXRW, I noticed the wires the stock wiring harness are not tinned, but just plain stranded copper. They are also all 18 awg. I have read that all wiring for marine applications should be at least 16 awg and always tinned. Why does the Yamaha harness not use tinned wire and under gauged?
 
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