Hello, all. This evening my Hustler Super-Z died while my wife was mowing. It's a 2007 Kohler Command 30, CV750. Long story short, there is no compression at all, a large oil spill on the left side of the engine, and I can also feel puffs of air coming from that area when I crank it. Would you agree this is likely a cracked block? My main question is whether I should buy a short block, or do a full replacement? Price is a concern, of course, but if there is a good reason to do the full engine, I'd do it. From a skills standpoint, I am no pro by anyone's definition, but can certainly handle a full replacement myself, and have two mechanics (one auto, one locomotive) willing to assist. finally, is there a better choice for an engine? Or would switching engines be more complicated? I'd appreciate your thoughts and advice.