Have been looking at a couple of 1010's lately but don't know much about them. They are a 4 cylinder diesel with glow plugs. We've had a 4020 4010 and a 4230's which are 6 cylinders and much bigger, 90 versus 36 hp. These tractors need long glow plug cycles to start where the 4010 and 4020 didn't need any starting aid down to about 20 degrees F. Motors also sound loud for as small as they are. They are 1961 models, any input? DW