recently purchased this machine. It has 1560 hours on it. I've put about 100 of them on there with no issue. I used the machine for half a day with no issue running it at WOT. then I noticed it was starting to break up and would blow white smoke when it did. It was very rich smelling. If I let off the throttle a little it would smooth out and run fine. By the end of the day it had gotten worse with more smoke and running rough from 3/4-WOT so far I've installed 4 injectors, new lift pump, fuel filter, and eliminated the fuel tank and fuel filter housing by running the machine off a 1 gallon tank going straight to injector pump. Any ideas or suggestions ? Thanks in advance