I guess on a "used" mower I would change the oil/filter, grease everything (zerk, zerk, zerk), check the tire pressure (before deck leveling), level the deck (side to side and front to back), check the blades (sharp, bent, chipped), probably even take a look at the air and fuel filters, battery charge level... hell maybe even check the plugs (oil, burnt, gap, etc).
Now, since yours is 1.4 hours... I might do everything except the oil (probably just check to make sure it is at the right level). I would still change it at 5 hours. You don't know who put those 1.4 hours on it so you don't know what it's been through.
Now, since yours is 1.4 hours... I might do everything except the oil (probably just check to make sure it is at the right level). I would still change it at 5 hours. You don't know who put those 1.4 hours on it so you don't know what it's been through.