12.13.2 Navigation with one only engine

The yacht is driven by two powerful propulsion systems designed to operate together and at the same time.

In case of failure of one of the propulsion systems, you may navigate with only one engine.

Therefore we suggest You to:

• Shut OFF the failed propulsion engine;
• Adjust the position of the rudders in the opposite direction to that of the faulty propulsion system; if the rudders are unable to counteract the asymmetrical thrust of the system in motion, also help by lowering the trim tab on the side of the faulty system, or reduce the speed again;
• Head to the nearest landing at a reduced speed;
• Keep the yacht at speed that allows you the best manoeuvrability.

In case one engine stops due to a failure and the gear box is in idle position, during navigation keep constantly an eye on the oil temperature of the gear box connected with the failed system.

The propeller shaft is kept rotating thanks to the water flow through the propeller, under these conditions also some parts of the gear box are kept rotating.
If the temperature increase excessively over 80°C, lock the propeller shaft by engaging the gear box: in this way the resistance will be higher, because the gear box is jammed, but oil will not overheat.

WARNING

The yacht has been designed to navigate driven by two engines; please remember that it is possible to navigate with one engine only in case of emergency and for a very short time.

DANGER

It is absolutely forbidden to perform reverse run with one of the two engines stopped. This operation is allowed only in case of life danger for the persons on board and for the safety of the yacht itself, however when the engine is running it should not run higher than 1000 rpm.

This yacht is equipped with a Trailing Pump on the gearbox module; this system allows navigation with a single engine while safeguarding the mechanical components of the engine switched off.

For long distances a “sea water” cooling circuit has been provided with the following modes of use:

For prolonged navigation with one of the two engines switched off, operate as follows:

• With both motors working, the 3-way valves, positioned between the engine and the inverter, must be kept in configuration “A” (no partialization of the water flow towards the other inverter);
• If one of the two motors shuts down or fails (engine OFF), the corresponding valve must be set to position “B” (the inverter now receives part of the cooling water from the operating gearbox flow).