I have a 8-9 year old Scag Turf Tiger. Has a 25 HP Kohler. Running it for the first time this season, after about 10 minutes of mowing, the blade clutch dropped out but the engine kept running. I noticed that the ammeter was pegged and it had blown (melted!) one of the 20 Amp fuses on the back of the operator panel. Things I've checked: Removed both battery terminals and cleaned. They looked OK. Checked the battery ground to the engine block. This was slightly loose. I cleaned and tightened. The battery was replaced middle of last year. After cleaning the terminals and replacing the fuse, I was able to finish mowing, BUT the ammeter will still showing around 8-10 amps all the time. (If I recall, this normally would show around 2-3 amps) Would anyone have any suggestions on areas to troubleshoot? Thank you!!!