Recently I thought the starter motor was turning a little slow,now I have my batteries unbolted and cleaned every three months. In fact, I cleaned them myself in May,so i stopped at a truck stop and had my batteries checked they all checked good. With one showing less amps than the rest, so I asked the technician what would cause that to happen.He replied a dirty cable well I just cleaned them in May I told him. Makes no difference he remarked. The summer heat causes the batteries to heat up causing the cables to green up and not charge properly. sure thing, he unhooked the battery and it was dirty. So I guess we should check the batteries more often. Well what do you think? until next time, be safe
Dick