The gal in my office has a Gehl 4615 that is no longer running. She claims that she had someone come out and look at it and that person said that the motor is toast. I would like to find out what motor is in it so I can at least see if one can be found and at what cost. Can anyone help with this? I have tried some serial number searches and the only thing that comes up, past model identification is the opportunity to buy something. The serial number is 11822.