On the Toro zero turn 5000 (22.5 hp engine) there seem to be many safety switches that may be my problem. It seems the engine is seized after removing the cowling and trying to turn the top nut with a ratchet which I can't turn at all. Where do the tow/ no tow rear pins have to be positioned? Where do the arms have to be positioned? and what else has to be positioned to allow a non-frozen engine to be turned? ...I need a good diagram on the Toro 5000 or someone that has turned one with a ratchet.