check fuse then if good check to see if motor is stuck small screw driver thru the open end of motor it has slots in it I have one that sticks every time i use it
there should be a bolt on the bottom of the clutch pulley that holds it on. be sure to unplug it first as they are fairly heavy. if it wont just slide off sometimes you may need to pry it off . there are a lot of videos on you tube that show this job.