The hot start problem is on a Kawasaki 19HP FH601V with 192hrs. The motor will start fine if it is the first start of the day, if it has been given time to cool down in between mowing and if it is started right back up after shutdown for about 5 mins. When hot and sitting the motor will just crank and not catch. It seems that the mower is flooding but I havent been able to find the problem. I have replaced both coils, throughly cleaned the carb & replaced the needle valve, checked the float, replaced the spark plugs, checked the solenoid on bowl for power and while cranking, and finally checked and adjusted the valves at 185hrs. Intake valves were at .012 and exhaust valves .011. I adjusted all to .005. I just recently checked them again at 192hrs and noticed that the exhaust valves were both at .009. I just readjusted them again to .005. I believe that I have covered everything I could think of and the dealer as well. I think it definately is a fuel or valve related problem but I cannot pinpoint it. The dealer said it sounds as though the valves are seating fine and by ear they sound okay. Also, when cranked up to full throttle or PTO engaged a hesistation is noticed with some black smoke with these problems occuring all the time. Upon shutdown a nice backfire was present before both valve adjustments. Also, while looking into the carburetor while cranking excessive fuel is puddling towards the air cleaner and when opened up to full throttle from idle. Any advice as to this problem would be greatly appreciated. Thanks.