HI
Thats a Tractor 8, I would say Early to mid 80's, If you look on the front of the engine cowl above the spark plug will be a series of numbers, the last 2 numbers of the "code" are the year it was made.
That was one of the basic electric start models, just a manual solenoid they are about as simple as it gets, negative wire to chassis, positive wire to solenoid - to starter motor. hook up a battery or some jumper leads, pull the lever and away it should go. There is no service manual as such, there are operating instructions in the back of the parts manual, which I just noticed arent in the file for download on this site, I could scan them for you.
