I have a hyper 7 and if it flips over and stays upside down for more then a couple seconds, when i flip it back over it will run for a few more seconds then stall out. i realize this is because its sucking fuel from the bottom of the tank and when its upside down it gets air in the line and when the air gets to the engine it stalls. my problem is when i go to restart it, there is a bunch of air in the fuel line. there will be a little bit of fuel then soem air then some fuel and it is liek this throughout the whole line. so i can prime it till some fuel is in the engine and it wll run for a seconds then die. it seems like i also have this samae problem when i try to restart the engine after i refil the fuel tank after it has run out of fuel. i prime it till there is fuel all the way to the engine, and as soon as i pull the starter, the fuel seems to go back down the line just leaving a lot of air right there. how can i fix these problems?