I bought a used chipper that hasn't been used but a few times I know thi becaue I know the old owner he didn't have a manuel for it but now it just won't start I know it set up a couple of years any ideas what's wrong

Start by doing an oil change, plug replacement & gap, drain old gas and open the carb bowl. Drain the carb and flush the bowl, carb and needle valve with carb cleaner. Temporarily remove the air filter completely until you get it started, then install a new filter. Spray a bit of cold weather starting fluid into the air intake and give it a go.

Carb is probably gummed up. Remove the carb and clean it thouroughly and then reassemble and readjust.