I want to thank chip for the info on the heater. I noticed that the ignition switch turns counter clockwise and looks like it might be for the heater. Will run out and check tomorrow. I note that no one has commented on the origin of the engine design. When I got the tractor I noticed that the key had IZUZU written on it. Further investigation states the IZUZU help in the design of the 4 cyl engine. Sure runs nice. Don't want to get to wordy one this post, but want to know about some other items. The books stink.