My gas JD 3020 was running good, but yesterday when I turned the starter on it made a fairly loud thud sound, then just clicking of the solenoid. It has a front loader so access to the starter is tough. First question is: how many bolts hold the starter on, 3 or 4? I can see two ok. Could it be a sticking starter? How can I check without taking the starter off? Where to start. ken