I have a 2002 Exmark 52 inck ZTR with a kawasaki FHV680 23 HP on it. The oil has been changed every 50 hrs or so including the oil filter. The mower itself only has 384 hrs on it. I was cutting the other day and the mower just shut off on me. The drive pulley under the seat like seized up and the belt slid on the pulley. The first thing I noticed was the smell of a burnt belt so I thought maybe I had broke my drive belt. I looked, it was on the pulley in the back and around all my blade pulleys fine. I pushed the arms out, raised the brake and turned the PTO off and tried to start it again. It ran for about 2 seconds then shut of again. This time when I turned the key, it did nothing. I called my local dealer, they said to try and jump it off the starter selonoid with a screwdriver. i pulled the rubber ends back and tried that..it sparked so i know the battery it good but the engine just like trys to move but doesnt. I swear its like its siezed or something. I just cant see how a machine like this with this little of hours can need a major engine repair now. Does anyone have any idea on what is the problem or what you can do if it is a seized engine? Can you rebuild or just swap them out? It has a clutch in it so you can spin the drive pulley freely. I pulled the plugs and the housing off the top of the engine and put a screwdriver on the sprocket on the top and I cant even budge it. That motor should turn. Am I screwed myself here?