I own a Gravely 260-z, I have had starter issues for a while and I'm fed up. Here is my issue, last year when I tried to crank it nothing would happen. If I kept turning the key finally it may turn over and crank. Sometimes it never would, so with a tap of the hammer it would crank. I have replaced the battery, ignition switch, starter solenoind and starter. It still does the same thing. I've checked voltage from ignition switch to the starter which reads 12v. I have ran out of ideas and options.