I would try a better screw driver first. One that fits the phillips correctly. I looked at the web site and it looks like you could grab the head of the clutch screw with small channel lock pliers. Unless the screw head is already stripped out. Then we use a dremel with a cut off wheel to make a slot across the head to use a slotted screw driver. As for the make of that .18 GO engine its generic, chinese. Basically no name.