What engine is that Fector? Two stroke engines with Walbro diaphragm carbs have an internal fuel pump that should work in your application. They work off the crankcase pulse. Four strokes, to my knowledge, all have vented crankcases and would require some type of mechanically driven pump. I do recall a thread about a GXH50, where the poster thought there was a way to add a pump. Don't recall the outcome.