This morning we were getting ready to leave for 3 weeks. Right before we were to cast off the engine shutdown. It gave me a low oil pressure. Later on I was unable to start the engine. The engine had ran fine a couple days ago. I can't even find the oil pressure sensor sending unit. The manual from Yanmar dosen't tell you much. Anyone know if Yanmar has any info online? I would first like to replace the sending unit to see if that does anything.