My Deutz has its fuel hoses on what would be your left side. There is a pre-filter with a screw on cap, a filter you should be changing, and then it goes to the pump. Might want to look at the hoses as they are a bit close to the engine, and seem to wear quicker than normal hoses. Oh, and might make some sense they leak when the engine is off because they are sucking and not under pressure until the engine stops...