dieselrob

Anyone have one of these with the gas engine? I got one for nothing and it was sitting for 2 years. I got the engine running today, got everything moving except the clutch. Its a 2 peice magnet clutch. When it get power it locks together. My problem is the bottom half doesnt work right. The top spins freely, but the bottom is locked up somewhere. Some how the bottom section should be two peices but i dont know how. The plate with the wires and bolts are stuck to the drum. Any one who might have knowledge, can you tell me about the clutch a little bit?