It appears that I also have some loose screws...on my fuel lift pump. My buddy and I purchased a 30' sailboat with a Yanmar 2GM20F. As we were tracking down the source of the diesel
smell, we determined that at least one source is the diaphragm
of the fuel lift pump. With the heat exchange directly on top of this pump we can't tighten the screws directly. We will have to remove the pump from the block. My question is what sacrificial parts
will we need on hand to put the pump back in service
once we've tightened things down? Replacing the gasket
between the pump and the block seems appropriate. What about the fittings that connect the fuel lines to the pump? What about the diaphragm
itself. The engine is 20 years old and although some parts
seem to be newer, the lift pump appears to be original. The boat is used for coastal weekend cruising. The engine runs fine and start fine. The boat is in FL.