hi. my dad has an old GT 18 twin. i put a new battery in it today. i got some clicking and a buzz, but it would not turn over. this fine tractor ran great last summer. i checked the 15 and 30 amp fuses which were ok. the lights were bright when i turned them on. is there an alternator on this tractor? can you please help me get this fine machine running once again?? the wires to the silanoid feel tight, but i can't seem to get to the silanoid. thanks for any input........ister mowrey