Having some issues with one of my Ranchers. We've been out 4 times in the last 5 weeks and 2 out of the 4 times I've had some sputtering with one of my Ranchers. They are both 2013 macghines, both fuel injected. When it happened the first time I thought maybe it had something to do with the heat (94 degrees) and that there might have been some vapor locking going on. And it happened right at the end of the ride about a mile or so from the truck. The tank is vented, and it acted as if is was starting to run out of gas, but a quick stop and check on the fuel tank, it showed 3/4 full after roughly 35 miles of riding. Made it back to the truck loaded up and went home. I try to run ethanol free fuel if I can find it but that is getting tougher and tougher to find around here, but do run premium with an additive that is suppose to combat the ethanol. Over the course of the week I pulled the plug, it didn't look terrible but put a new one in anyway, added more fuel treatment and when for a ride last Sunday, ran like a top, not one miss or sputter. Fast forward to today, headed out at 8a.m. this morning, unloaded, road all morning into early afternoon with out any problem then as it warmed up and we were about 10 miles from the truck it started acting up again. I looked at the fuel gauge and it was at the 3/4 mark. Question: This is seeming like a fuel supply issue, at first I thought fuel pump or injector, but with it running fine one day on the entire ride and running good all morning into the afternoon today, I'm wondering if it could be a fuel filter issue? that maybe the bottom part of the filter is plugged and with a full tank of fuel it's getting ample supply. I have read the fuel filter and pumps are inside the tank so this isn't a real simple fix. Any thoughts as to what might be causing this? The other one is running flawlessly in the same exact conditions, same fuel, and same fuel treatment. Thanks to anyone with some suggestions. FF.