For fail safe designed structural components
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1getting 2 size 3 heads 4 circulating 5 ubricating 6 cooling 7 filters 8 valves
2. How long do preparations for starting last?
Preparations for starting usually begin about one hour or more before departure. The time required depends mainly on the size and complexity of the engine.
3. Why must an engine be heated up before starting?
The engine must be heated to allow its components to expand gradually. This prevents excessive stress, reduces wear, and ensures safe operation when the engine is put under load.
4. How is a marine diesel engine heated up?
A marine diesel engine is heated by circulating hot water through the cylinder jackets and other important parts, bringing the engine up to the correct operating temperature.
6. Why is the crankshaft turned before restarting?
The crankshaft is turned using the turning gear to make sure all moving parts are free and working properly. It also helps to remove any water that may have collected inside the cylinders.
4. Are all marine engines made to run in reverse?
No, not all marine engines are designed to run in reverse. Ships equipped with controllable pitch propellers or reversible gearboxes can change direction without reversing the engine itself.
5. What is meant by “firing speed”?
Firing speed is the speed at which the engine is rotating fast enough on compressed air to allow fuel injection. At this point, compressed air is cut off, fuel is admitted, and combustion starts to accelerate the engine.
6. Can reversing be done at full speed?
No, reversing cannot be carried out immediately at full speed. The engine must first be slowed down, often with the help of compressed air. Once the ship reaches a lower speed, reversing can be performed safely and effectively.
1 Before a large diesel is started… 7 Auxiliary scavenge blowers… 9 The engine is now available… 3 The lubricating oil pumps… 4 All control equipment and alarms… 5 The indicator cocks are opened… 2 The various supply tanks… 6 The fuel oil system is checked… 8 The turning gear is removed…