Had a problem the other day was hoping maybe someone else has run into also. 2005 puma with the belly tank and 2 10 gallon kickers, previous owner said he never used the kicker tanks but Im wanting to now, I filled only the left rear the other day and ran the big tank almost empty and when I switched tanks I couldnt get the bulb to prime up hard and when I tried running it would only run about 30 sec then starve for gas. All the lines look in great shape, I wondered if you must fill both tanks so the line doesnt draw air in from the empty tank or if I may have a bad selector switch.