sounds like the condensor fan motor, what you need to do is get the model #, voltage, and HP of the fan. if you cant get a hold of the greek (jason) then get a hold of me, i could get one through my AC school.
just be advised you dont want to go to a bigger HP motor, (bigger is not always better). just get what the manufacture recomends.
(Ragdoll MX) on daves screen name