You could go to sears and buy this tool that is made to grasp things by pressing down a push button of sorts with your thumb as you hold the tool in your hand, it has little fingers that spread out, so that when its at the tube you want to retrieve, you just let go with your thumb and it will grasp the red spray tube. Or spin the engine over slowly by hand till the piston reaches the top of its travel and try to grab it with twezzers or something of that nature. I cant say for sure if it will hurt anything at all, but should atleast try to get it out of there, but it would probably just get ate up and spit out the exhaust since its just plastic.