Propeller Curve and Engine Load Diagram If you’ve ever stood in an engine room listening to a big two-stroke diesel hum along, you’ve probably wondered: how do engineers know this engine

Tank Sounding a Ship Tank sounding is a routine measurement carried out on board ships to determine the quantity or level of liquid contained in a tank. It is an integral

Hydraulic Jack Working Principle Onboard merchant ships, some of the most critical bolted connections such as main-engine cylinder heads, main bearing bolts, tie rods, exhaust-valve assemblies and shaft-line flanges are tightened

Ship Welding If you’ve ever stood next to a ship being built, you’ve probably noticed the frequent arc flashes, the odour of hot metal, and the persistent hum of welding equipment.  

Reciprocating Pumps Reciprocating pumps are positive displacement pumps in which a piston or plunger reciprocates inside a cylinder to move liquid. When the motion is in one direction, suction of liquid

Electric Motor Maintenance Procedure Every ship runs on dozens of electric motors quietly doing work nobody thinks about until one stops  pumps, fans, purifiers, steering gear, winches. Most of them never

Purifier Overhaul Procedure A purifier does its job at extreme speed; the bowl spins somewhere in the range of 8,000 to 10,000 RPM depending on make and model, driven from a

Principle of Purifier A purifier looks, from the outside, like a box bolted to the engine room floor. What’s actually happening inside :  It’s separating oil from water and solid contaminants

Auxiliary Engine Piston The auxiliary engine doesn’t get the same attention as the main engine, but ask any engineer who’s had a generator trip on load why, and the piston is

Fuel Pump Index Method & Turbocharger Speed Method Introduction Monitoring the performance of a marine diesel engine is essential for ensuring efficient combustion, maintaining engine reliability and detecting abnormal operating conditions

Types of Power in Marine Engines Introduction Power is one of the most important parameters used to evaluate the performance of a marine engine. It indicates the rate at which an

Specific Cylinder Oil Consumption in Marine Engines Introduction The Specific Cylinder / lube Oil Consumption (SLOC) is an essential indicator of the engine’s lubrication regime. The consumption level should be controlled

Tappet Clearance in Ships One specific measurement that gets checked on every unit, every overhaul, without exception: tappet clearance. It looks like a small thing. A tiny gap, measured in fractions

Drinking Water on Ships A ship can carry enough fuel, food, and spare parts for a long voyage, but water is different: people need it every single day, for drinking, cooking,

Indicator Diagrams on Ships Ask any marine engineer what tells you the real story of what’s happening inside a cylinder, not what the gauges say, not what the manual predicts, but

Marine Boiler Burners Ask a boiler operator what fails most often on the auxiliary boiler, and mostly, the answer comes back to the burner. Not the shell, not the tubes, the