I have a 52" exmark lazer z as, 2009 model that im having trouble with......i hade the starter rebuilt in february, have cut 50+ yards with it since then......without a problem......not its started acting up! It was just dying but would start back, then it would start sometimes but not always, not it wont do a thing! Wont even click, nor does digital display work......i have taken the starter off and cleaned all up, checked fuses, thought possibly a safety switch initially, batter tests good on a load tester. but now im stumped! Its 90* here and grass is growing! I dont have time to spare with a tore up mower.....any suggestions? Solenoid maybe?