Dry Exhaust Systems and Keel Cooling by Solé Advance

Discover innovation and efficiency with our dry exhaust systems and advanced keel cooling technology for boat engines.

Solé Dry Exhaust Kit

Standard Solé Marine Engines are distinguished by their integration of a wet exhaust system. In this configuration, seawater from the cooling circuit mixes with the exhaust gases, a common practice in the industry. However, the critical water injection point is located at the exhaust elbow, a key component in the system.

For those seeking an alternative, we offer the dry exhaust system. This option eliminates the mixture of seawater with exhaust gases, allowing the exhaust line to be completely independent. This design minimizes the risk of water entering the engine through the exhaust manifold, a common concern in traditional systems.

Dry Exhaust Systems and Keel Cooling by Solé Advance

We offer different versions of our Dry Exhaust Kit to suit various needs and applications:

  1. Basic Dry Exhaust Outlet Flange Kit: Includes a basic adaptation plate.
  2. Flexible & Dry Exhaust Kit: Adds a flexible elbow to the basic kit's flange, improving installation in tight spaces or with special requirements.
  3. Quiet Dry Exhaust Kit: Integrates the previous kit with a silencer, significantly reducing noise, ideal for vessels where acoustic comfort is a priority.

Keel Cooling: Discover What It Is and Its Benefits

Keel cooling, also known as keel cooling, is a closed cooling system, externally mounted on the boat's hull, below the waterline. This system is like a car radiator: the engine's coolant circulates through the keel cooler, dissipating heat before returning to the engine.

Thanks to its constant contact with seawater, the keel cooler ensures efficient heat transfer between the coolant and the water, optimizing the cooling system's performance.
This system is designed to be externally mounted on the hull, below the waterline, ensuring efficient and constant heat transfer with seawater.

If you are interested in learning more about the features and advantages of the keel cooling system, keep reading to discover more.

Advantages of Keel Cooling System

Advantages of Keel Cooling System Compared to open circuit cooling systems, closed circuit systems like keel cooling offer multiple benefits:

  1. Eliminates the need for internal heat exchangers, untreated water pumps, filters, and seawater piping, thus reducing required maintenance.
  2. Prevents sediment, algae, and sand accumulation, protecting the system from saltwater corrosion.
  3. Avoids seawater entry into the hull, increasing safety and efficiency.

Types of Keel Cooler Installations


This installation in the hull of the vessel facilitates mounting and provides protection against damage. According to tests in the Vienna Model Testing Basin, drag is minimal. This method is ideal for fast vessels and can be located on the side or bottom of the hull.


An external keel cooling installation usually applies fairing and side plates for extra protection and to improve streamlining. This mounting option is commonly used in retrofit projects.

Side Mounting

This method avoids damage to the unit and is perfect when bottom mounting is not possible.

Internal (Box coolers)

Designed for the commercial maritime transport industry, these compact systems are ideal for fresh or brackish water, and with special coatings, for seawater.

In summary, the keel cooling system simplifies the maritime cooling process, offering an efficient and safe solution.

Keel Cooling Kit for Solé Advance Marine Engines

The standard Solé engine is characterized by its two cooling circuits: the coolant circuit, which cools the engine and is in turn cooled by seawater, and the seawater circuit, an open system that absorbs seawater for cooling and then returns it.
As detailed above, the keel cooling system represents a significant innovation in the nautical field, eliminating the need for a seawater circuit.
This method involves redirecting the coolant circuit to an external cooler, typically installed in the hull of the vessel, allowing the coolant to be efficiently cooled through direct contact with seawater.
When opting for a Solé engine specially designed for keel cooling, you will receive an engine fully adapted for this specific function. The engine we supply as "Prepared for Keel Cooling" includes a dry exhaust flange and is delivered without a circuit for the conventional saltwater cooling system.
If you are planning to install an engine in any commercial vessel, do not hesitate to contact your nearest Solé distributor for personalized advice.

Dry Exhaust Systems and Keel Cooling by Solé Advance

Solé does not design, supply, or take responsibility for the externally installed system.