04-09-2012 09:01 AM
You engine may be equipped with a Hydramechanical shutdown system
This system uses engine oil pressure to operate a hydraulic actuator on the governor.
The system has a shutoff control group that is typically located at the right rear of the engine mounted to the outside of the cam cover.
Several steel hydraulic lines connect the control group to the various protection devices such as, coolant temp and low oil pressure and includes overspeed. The engine may also have an inlet air shutdown. Finally there is an actuator attached to the governor that directly connects to the fuel rack.
If the engine is equipped with this system and it is the older design it may cause your symptoms, The older units did not require a reset procedure in order to restart the engine.
04-24-2012 11:27 AM
Well the vessel is back in port and a technician has looked at the engine.It has no overspeed protection fitted so he has removed the govenor to calibrate and test on the bench.I will post back when I have an update.