I don't know all the specs of that motor, so it is difficult for me to answer. If you cannot measure the current draw, then you might be guessing too. If you can find all the specifications for that motor, then eCalc can give you a good idea of the numbers.
http://www.ecalc.ch/motorcalc.htm?ecalc&lang=en
or you might prefer:
http://www.ecalc.ch/motorcalc.htm?ecalc&lang=es