I couldn't get my 1973 mercury 50hp to fire.12 footer, I checked the control box like you suggested and found every wire in the box <br />naked and corroided from age.I think the neutral switch wasn't making,but everything is going have to be replaced from the looks of it.I tried stripping the wire back but the wire is bad almost all the way back.Does anyone have a suggestion,or does anyone know how much a new cable and switches would cost.