These Gensets were in the vessel I Captain and have been rebuilt and maintained under my watch for the last 10 yrs. They have around 6,500 hrs and run fine.  The only reason we replaced them is we moved to 65kw. The vessel was undersized for the 40 kw we are selling and need both to run the vessel 80% of the time.  This is the only reason they are not still in the vessel and operating today.  These are currently salt water cooled and can be converted to air cooled by replacing the header tank with a fan.  Please call me if interested we don't have a set price and willing to work with you as I need the storage space they occupy currently. Who ever wants these will get a very good deal.