Conventional Injection Systems

We explore conventional diesel injection systems, explain their mechanisms and types, the importance of precise engineering, and differences between direct and indirect injection.

Engine Operation

We learn about the four operating cycles of a diesel engine - intake, compression, power, and exhaust - and the importance of timing and coordination for efficient engine operation.

Engine Cooling

We explain how to manage excess heat from the combustion process through water cooling systems, and briefly cover the distinctions and maintenance implications between wet and dry cylinder liners.

Turbochargers

We learn how turbochargers enhance engine power by increasing air intake and oxygen, the intricacies of their operation and maintenance, and the trade-off between increased power and reduced engine life expectancy.

Reducing Emissions

We address how legislation has forced innovations in emissions reduction technologies, and the implications of these complex systems for engine maintenance.

High Pressure Injection Systems

We discuss the evolution and benefits of high-pressure fuel injection systems, and the limits they impose when it comes to DIY maintenance.

Engine Access

We emphasize the importance of proper engine installation and run through a list of the engine parts that need to be accessible for maintenance.

Engine Mounts

We examine engine mounts and their crucial role as the connection between the engine and the boat, and learn how to inspect and maintain them to ensure optimal engine alignment.

Fire Fighting Equipment

We explain the U.S. Coast Guard's and the ABYC's installation requirements for firefighting equipment in engine compartments, portable and fixed fire extinguishing systems, and the importance of choosing the right type of extinguisher and ensuring proper installation to prevent accidental activation and potential engine damage.

Raw Water Cooling Systems

We talk about installation requirements for seawater cooling circuits and learn about the importance of using the right type of suction hoses and the installation of a siphon break to prevent saltwater flooding of the engine.

Exhaust Installations

We cover the importance of exhaust system geometry in preventing seawater flooding of the engine, and address the risks associated with carbon monoxide poisoning if the system is not properly installed.

Hose Clamps

In this short lesson, we emphasize the importance of using high-quality, corrosion-resistant hose clamps and how to select and install them.

Fuel System

We cover essential installation requirements for fuel systems to prevent leaks and environmental hazards, the importance of using appropriate materials for fuel tanks and hoses, and the requirements for primary and secondary fuel filters.

Air & Noise

In this short lesson we highlight the importance of ensuring an adequate flow of dry air to the engine compartment, which often conflicts with the need to minimize engine noise.

The Oil System

We provide an overview of the engine's oil system, explain its basic components such as the oil pump, filter, and pressure relief valve, and emphasize the importance of regular maintenance for engine longevity.

Oil Filters

We discuss the critical role of oil filters in engine longevity, explain how they function, the significance of micron ratings, and the necessity of selecting high-quality filters to prevent engine wear.

Oil Change Schedules

We focus on when, and how often, to change your engine oil, taking into account different factors such as engine use patterns and fuel sulfur content, and highlight the importance of regular oil analysis for early problem detection.

What Oil to Use?

We delve into different types of engine oils, explain the American Petroleum Institute (API) classification system, the importance of choosing the correct oil viscosity and type for specific engine requirements, and the pros and cons of synthetic oils.

Air Supply

We explore the volume and temperature requirements of intake air, guidelines for engine room ventilation, and various types of air filters.

Crankcase Ventilation

We focus on the function and maintenance of crankcase breathers, exploring different types of varying complexity and their role in preventing pressure buildup and oil mist pollution.

Air System Maintenance

We cover the maintenance of air filters and crankcase breathers, and highlight the importance of regular checks to prevent engine performance issues.

The Exhaust Side

We address the flow of air post-combustion, the importance of preventing carbon buildup in the exhaust system, and the management of turbochargers and their wastegates.

Damper Plates

We examine the role of damper plates, their function in absorbing shocks and vibration, and how to replace them if necessary.

Transmission Configurations

We explore different types of transmission configurations, including planetary and two-shaft gears, and the nuances of their operation and maintenance.

Clutches

We focus on the two main types of transmission clutches - multi-plate and cone clutches - and talk about their operation and common wear-and-tear issues.

Transmission Maintenance

We discuss the importance of regular transmission maintenance, including oil level checks, oil changes, and inspecting the operating mechanism to ensure smooth transmission function.

Couplings & Joints

We cover the critical aspects of propeller shaft couplings and joints in the drive train, including their alignment, maintenance, and troubleshooting tips for common issues.

Stuffing Boxes

We address traditional shaft seals, known as stuffing boxes, including their types, maintenance, and replacement techniques.

Dripless Shaft Seals

We introduce modern alternatives to traditional stuffing boxes, such as face seals and lip seals, and detail their advantages, installation, and maintenance.

Shaft Bearings

We focus on shaft bearings, particularly rubber sleeve ('Cutless') bearings, and discuss their role, wear signs, and replacement procedures.

Propeller Installations

We explore the intricacies of propeller installations, including general selection criteria, installation techniques, and maintenance tips to ensure optimal performance.

Saildrives

We examine the unique features and maintenance requirements of saildrives, and highlight their benefits and potential issues, particularly with respect to galvanic corrosion.

Final Words

We say a few final words and give an outlook to future additions to the course.

Repowering vs. Rebuild

We discuss the advantages and disadvantages of rebuilding versus buying new when an engine needs extensive maintenance.

Testing an Engine

We describe a detailed process for conducting a sea trial and assessing the basic state of an engine without requiring specialized tools or invasive procedures.

Optimized Efficiency

We learn about optimized operating speeds and loads for marine diesel engines and why we rarely see them in practice.

Engine Performance Curves

We dive into the details of published engine data and what it all means.