Ok I am swapping a motor out of my 312-8 (motor ran fine tractor in rough shape) into a 310-8 (blown motor has sat for 5 years) and have the motor swapped and hooked up gas line is good brand new battery, starter is good, problem is when I turn the key now nothing happens but if I cross solenoid it rolls right over am I right to think it's either key switch or solenoid?