My 86 Citation is powered by a Yanmar 3GM30f which is under the sink in the galley. It looks like it is glassed in along with the refig-freezer, sink and the back of the settee. The diesel started leaking oil in front of the block, but I can't pin point exactly where it is coming from. Question,has anyone had this problem and how did you fix it? Also has anyone taken the diesel out off your Irwin Citation? It doesn't look easy, does it have to be cut out or the sink removed or does it come out through the opening under the settee cushins? Thanks