Cooling

Raw Water Circuit

We discuss why we need the cooling system, explore the raw water circuit, learn about heat exchangers, and special cases such as direct seawater cooling and keel coolers.

Raw Water System Maintenance

We discuss the need for regular maintenance of the raw water system, including the importance of cleaning strainers and ensuring the functionality of impeller pumps to prevent overheating and potential engine damage.

Impeller Change

We learn how to change the impeller in the raw water pump and discuss the maintenance schedule for this crucial item.

Sacrificial Anodes

We discuss the crucial role of sacrificial anodes in preventing corrosion in the raw water circuit, and the importance of regular checks and replacements.

Descaling Heat Exchangers

We cover the maintenance of heat exchangers, including descaling to ensure effective heat transfer, and inspection for corrosion or scale buildup.

Siphon Breaks

We explore the function and maintenance of siphon breaks, which are a small but crucial piece of kit for preventing seawater flooding of the engine.

Exhaust System

We examine the maintenance of the wet exhaust system, including the inspection of exhaust injection elbows and waterlift mufflers for signs of carbon buildup or corrosion.

The Freshwater Circuit

We introduce the freshwater cooling system and highlight the importance of maintenance for the drive belt, and regular antifreeze replacement.

Freshwater Pump Belt Maintenance

We detail the maintenance of the freshwater pump's drive belt, including tension adjustments and checks for wear or misalignment.

Types of Antifreeze

We discuss different types of antifreeze and their chemical compositions, and emphasize the importance of using the correct antifreeze and not mixing various types.

Changing the Antifreeze

We provide a step-by-step guide on how to change your antifreeze, including draining, flushing, and refilling processes.