The dealer is a very good dealer. I am confident that he will fix it, and the price will be adjusted, thats why I took it back. I know never use ether, but once in its life it wont kill it. The machine does have return lines. The fuel is good. There is no fuel additives in the tank. It also has a tank switch (left tank right tank and off). Maybe those lines are messed up. My guess is that is the next area to diagnose. So if it is a return line clog youre saying the engine would be getting too much fuel correct?