Clean. And new tanks and filters. Tank sits on shelf above height of engine. No fuel returning into stock tank.
OK lets try this again. there is a fuel tank inside the housing, i don't use that one but instead i use a outboard motorboat tank with a squeeze primer bulb.the tank is a little higher than the Genny so i should have plenty of gravity to push the fuel through. the tank is brand new as is the Genny with only 4 hours on her. if there was some type of return the on-board tank would be leaking allover the Genny but i have no leakage.the on-board tank has a filler on the top which if it was not in a bulkhead would be easy to fill.