Section 02
Engines & systems
Parts, the four-stroke cycle, fuel, air, cooling, oil, exhaust, electrics, instruments and sizing.
03Marine Diesel Engine Parts ExplainedLearn the major parts of a marine diesel engine and how fuel, air, cooling, oil, exhaust and propulsion systems work together.04How a Four-Stroke Marine Diesel Engine WorksHow compression ignition, fuel injection, turbocharging and cooling work together in a marine diesel, and why the four-stroke cycle matters aboard.05Mechanical vs Common-Rail Marine Diesel EnginesCompare mechanical and common-rail marine diesels on diagnostics, parts support, fuel tolerance and efficiency, and see which suits a cruising boat.14Horsepower, Torque and RPMWhat kW, horsepower, torque, rated rpm and continuous ratings mean on a marine diesel, and how propeller demand decides what you can actually use.15What Size Marine Diesel Does a Boat Need?Size a replacement marine diesel using displacement, hull form, propeller, gearbox ratio, duty and installation constraints.16Marine Diesel Fuel SystemsTrace a boat diesel fuel system from tank to injectors and learn the causes of air leaks, contamination and fuel starvation.17Marine Diesel Cooling SystemsHow raw water and coolant share the job of cooling a marine diesel, and where heat exchangers, impellers and thermostats fail before an overheat.18Marine Diesel Lubrication SystemsWhat oil pressure actually tells you, how to choose the correct grade for a marine diesel, and the early warning signs of lubrication failure.19Air Intake, Turbochargers and Charge-Air CoolingHow a marine diesel breathes: air filters, turbochargers, intercoolers and crankcase ventilation, and why restricted air shows up as black smoke.20Marine Diesel Wet Exhaust SystemsHow a yacht wet exhaust works, and how back pressure, a failed anti-siphon loop or a tired hose lets seawater or carbon monoxide reach the engine.21Starting and Charging SystemsHow starter batteries, solenoids, alternators and cabling work together on a boat, and how voltage-drop testing finds faults a meter alone misses.22Marine Engine Instruments and AlarmsWhat oil pressure, coolant temperature, tachometer, charging and saildrive alarms are telling you, and which ones mean stop the engine now.23Engine Mounts, Couplings and AlignmentHow flexible mounts, couplings and shaft alignment control vibration on a boat, and why poor alignment quietly destroys seals, bearings and mounts.24Engine-Room Ventilation, Fire Protection and NoisePlan engine-room airflow, insulation, fire control, access and carbon-monoxide protection so the space around the engine is as sound as the engine.