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Thermal engines vs electric engines: focus on common breakdowns and their costs

Thermal vs electric engines: discover why the KRONOS from Weenav reduces breakdowns and maintenance costs.
4 July 2025 by
Thermal engines vs electric engines: focus on common breakdowns and their costs
Weenav, Sophie Castelain

Frequent malfunctions of thermal engines

In the field of boating, whether for leisure or professional purposes, the outboard thermal engines are often faced with technical problems that can spoil a trip at sea. These breakdowns impact not only performance but also the maintenance budget of the boater. With the rise of electric engines, such as the KRONOS developed by Weenav, it is relevant to analyse these common difficulties to better understand the advantages of switching to electric.

Common breakdowns on thermal engines

Thermal engines, particularly four-stroke ones, have several sensitive points. Among them, we find:

  • The lubrication system, which can be a source of serious problems when the oil level is not properly maintained or when the filter is clogged. These neglects can lead to premature wear or even severe engine failure.
  • The ignition, often affected by the condition of the spark plugs. Their wear can cause misfires, difficulty starting, or irregular engine operation.
  • The fuel supply is also a frequent cause of breakdown: the presence of impurities or water in the tank can lead to filter clogging and poor combustion.
  • The battery, particularly when the voltage is insufficient, can compromise starting or recharging, making the engine difficult to use.
  • Finally, some mechanical problems related to gear shifting, often due to poorly adjusted cables or obstacles, can block the transmission and require manual or technical intervention.

The electric motor: simplicity and reliability

Unlike thermal engines, the KRONOS electric motor from Weenav benefits from a streamlined design that eliminates many sources of failure. The absence of fuel, oil, spark plugs or filters drastically reduces the risks of malfunction related to these elements.

Moreover, the KRONOS integrates a high-performance lithium-ion battery, ensuring a stable range and instant starting, without the constraints of traditional batteries. The electronic control simplifies gear shifting, providing smooth and seamless navigation.

Costs and frequency of breakdowns: an estimate

According to feedback from boating professionals, the average annual cost of repairs and maintenance for a thermal engine can quickly accumulate, reaching several thousand euros over a decade. These costs include oil changes, replacement of wear parts, interventions on the ignition system, or repairs related to fuel.

In comparison, the electric motor has significantly reduced maintenance costs., with simplified and less frequent maintenance. The higher initial investment is offset by a significant reduction in long-term expenses.

In summary, electric propulsion, exemplified by the KRONOS, offers boaters a reliable, economical and ecological solution, eliminating common breakdowns associated with thermal engines. For a calm and sustainable navigation, the choice of electric is a natural evolution.

Published on: 04/07/25

Editor: Sophie Castelain

Thermal engines vs electric engines: focus on common breakdowns and their costs
Weenav, Sophie Castelain 4 July 2025
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