I have just taken ownership of a narrowboat powered by a Kelvin K2 (I have no previous experience with Kelvins), I was going to have my first attempt at starting her today but when I opened the fuel valve (from the day tank), diesel started to come out of the governor case at the aperture where the rod/chain protrudes linking the injector pump. The opposite side of the governor case, there is a level valve (which I opened previous to starting to check there was fuel in the governor and then closed) and next to it is a pipe back to the main fuel tank - there is a valve on this pipe which I have checked is open. I presumed that this return fuel line controls the fuel level in the governor - am I correct? - When the fuel valve is open, what stops the governor case "overflowing" other than this return fuel line or am I missing something? i.e. should there be a seal on the injector pump linking arm which as failed? I am reluctant to start her with diesel leaking down the side of the engine case.