I am new to all of this. I got my tractor from a near me with a half full tank. It ran great for about 4 hours then barely go it was empty. The gas companies here you say wet leg and they run. So I figured I could use a forklift tank it lets liquid out. So I turned off both valves on tractor tank. Connected my forklift tank on the left hand side where there is a block a cap on one side and the other side vapor line comes in. I crank it is strong runs great about 6 minutes then starts stumbling like it has no fuel barely goes. Turn off wait 30 minutes same thing strong for s bit then stumbles. Yes forklift tank in on hood and horizontal. Should I be hooking it up some place else to run off of this tank?