it is a 21horse Kawasaki on my scag 52 hydro. It starts, runs for 10 seconds and then dies. If I give gas, it dies immediately. I can get it running eventually, but then I have to leave it on. -battery is OK -fuel pump is pumping, filter is clean -checked all my safety connections and other wires, seems OK -carb is clean -fuel hoses that I can reach are fine, spark plugs fine Anybody have any clues based on what the engine is doing? like I said it starts up perfectly, then dies.