Tim, I picked one of these up for my 3205 and so far it has worked fine. I figured for what it cost it was worth a try.
http://www.ebay.com/itm/Fuel-Pump-Fo...BUgBIN&vxp=mtr
***specs say it puts out 3 to 6 psi. My Kawi FD620 is carbureted but maybe they can take more pressure then the Kohlers.