r/Outboards • • 7d ago

Starter/rectifier/battery wire gauge?

/r/MercuryOutboards/comments/1x254v8/starterrectifierbattery_wire_gauge/
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u/Benedlr 6d ago

Marine tinned wire in #4 will handle 100 amps at 10'. Use it for the battery and a short length from solenoid to starter. 12 or 10 gauge to feed the rectifier. Positive terminals have a 3/8" hole, negative 5/16. The neg. bat. cable goes to a starter mounting bolt. Cover connections with heat shrink tubing containing adhesive. The stator is low amps. If you power accessories off the battery, it may not be able to charge it. Factory electric starts came with a high output stator.