{TAIL ~ The fuel system} 1, wherein the throttle valve comprises a spring urging the throttle valve to a closed position preventing {HEAD ~ fuel} from flowing to the nozzle outlet passage 
{ TAIL ~ The fuel system } 1 , wherein the throttle valve comprises a spring urging the throttle valve to a closed position preventing { HEAD ~ fuel } from flowing to the nozzle outlet passage
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH