It could be a lot of things, but check that fuel drain tube coming out of the bottom of the filter block. It should be tight. That is what was wrong with mine. It was that way when I picked it up. Our conditions sound the same. If it is leaking out of the line at the top left of the fuel block, that is the air bleed. Both of those should be screwed in thumb tight, both are black plastic. I changed the lift pump on mine, the guy at the pump shop said they have a check valve that goes bad fairly regulary and even though the pump is not leaking and makes good pressure, it allows the fuel to drain back from the injection pump. I am glad mine was simple, I wish I would have found it a lot sooner! I think my starter is dragging a little as well, it will not crank very long before killing the batteries. Glen