I'm about to go into the boat yard to replace my SD40
sail drives. While I'm there I will have the injectors out of my yanmars to get them serviced. My engines have burned excessive oil
since I bought the boat. Since the engines start on the first turn even in cold weather
I doubt there is anything seriously wrong with them. The PO used to charge his batteries with the engines rather than the Genset and I imagine the cylinders got quite glazed from s doing so. After reading a bunch about the problem the prevailing opinion seems to be that oil
residue on the cylinder walls is the most likely cause of the problem. Does anyone know of a chemical treatment I might pour in the cylinders while the injectors are out that might remove this residue? I can buy a lot of oil for the price
of getting the cylinders honed but a chemical treatment might just be worth the effort. FYI, I use about a quart of oil every 16 hours at 85% rpm
and maybe a quart every 30 hours at 66% rpm
and have done so for the pat 9.5 years.