Hey everyone. Been lurking for a while and not much posting, but the problem I started having with my 175 has me baffled. After about an hour of mowing, the tractor starts sputtering like its out of gas and has a mostly full tank. When looking at the fuel filter, I noticed its not completely full (fuel level is only 1/4 of the way up the bowl) and some air bubbles. So far, I have replaced the fuel filter and no difference; same problem persists. This morning I replaced the fuel pump and still the same problem. My next thought is replacing the fuel lines from the tank all the way to the carb. Do you have any other thoughts or suggestions before I start taking the seat pan off for this project?