where can i get diagram of the engine and fuel lines & carb. I need to see which fuel lines go where. I had to replace some parts and do some clean up. I just want to double check everything so it last and is as good as it has been in past. Have had it for many years and never any issues until gas lines and the rubber grommet on the tank that lines go into. their are three one is the vent, the other is the line with filter on it and the last one i think is the return.