ok so have gone through 4 mechanical piumps in 3 months, now i was running vegitalble oil and i might have #### in the tank no i havent ran any since i stuck the 1st new pump in there. ok i have been told that there is pumps in the tank ok if thats true the is there sock on the pumps like in a gas truck. im gonna drop my tanks and clean every thing. i can only imagine what is in there. if u guys know about the tanks and the fuel pump in the tank pls let me know thanks so much for ur help.