HELP!!!! I just " inherited a troy bilt tiller. On the control neck is says Garden Way TH-1019 S/n 388218 built 1/3/79 it has an electric start 8hp briggs on it. Except for the gas and oil its all original 1 owner unit. I need to know what is the true model-horse??, It has fwd, reverse,slow and fast, so is that a 2 speed?? Any ideas how good the cd discs for these are?? or where can i get a manual copy? jim