
Main Engine Lube Oil Pressure Drops While Running: What Is Happening and What to Do First
The alarm sounds at 02:40. The standby pump cuts in. Pressure recovers. The duty engineer logs it as a pump changeover and the vessel continues. Six hours later, the standby is already running — and pressure does not recover. What started as a manageable situation is now a main engine shutdown at sea. The first alarm was not a pump problem. It was the engine telling you something was wrong in the system.









