A generator can be used whilst the boat is in motion but there are a couple of limitation to bear in mind. The generator requires raw water for cooling which becomes more difficult to suck in when the boat is moving forward causing the generator to run hotter and sometimes shut down with an overheat. The often becomes an issue when traveling over 8 knots but differs from boat to boat. Another limitation can be angle of sail. The small oil sumps on the generators can lead to oil starvation causing the generator to shut down with low oil pressure. For this reason, we would recommend reducing sail if the generator is required to a heal angle of 10~15 degrees.

All sources of mains power will be separated by a mechanical or electrical isolation switch so you will only be able to use one at a time so you can run a generator when still connected to shore power.

Both engine and generator are to separate systems and can be run at the same time. Both machine have the ability to charge batteries when running and in this case, charge regulators will control the power being sent to the batteries.

The most common reason for this is fuel and typically occurs after a period of inactivity. Single cylinder generators will often suffer from this more than multi cylinder generators as one cylinder is doing all the work. Small amounts of air can seep into the fuel line causing an air lock between the fuel injection pump and the injector. The best way to encourage the air to pass is by connecting an oil extraction pump (like a Pela pump) to the fuel return between the generator and the diesel tank. A vacuum should be applied until no air bubbles can be seen in the fuel.

The generator requires over 12 volts to engage the starter motor so you should check the battery voltage is sufficient. A visual inspection of the generator should also be carried out to ensure there is no water leaks inside the capsule leading to corrosion and seized components.

-          The generator is fitted with protection devices to protect from overheating and low oil pressure. There is no differentiation for either fault so an inspection of the generator will be required. The first inspection should be to check the oil level. If this is okay, you should then check to see if the raw water pump to ensure it is circulating water and the impellor hasn’t failed. Low oil pressure will often stop the generator very quickly after restarting where an overheat will often take a lot longer like 10 to 15 minutes.

-          Low voltage is often diagnosed as no output. Many devices will not accept voltage less than 20% of its rated volage giving the user the impression the is no voltage but the actual voltage will help diagnose the fault. A voltage reading should be taken close or on the generator using a multi meter with any power sources disconnected. Low voltage is often due to a lack of excitation or insufficient engine speed. With a fixed speed generator, the throttle should be set to the maximum position and in the case of capacitor excited generators, replacing the capacitor will resolve the issue. Assistance should away be requested if unsure.

Hunting is caused by poor fuel supply. This could be caused by a blocked fuel filter, crushed fuel line or a loose connection. Fuel bug and water contamination will also cause a fuel related issues so the water and dirt separator should be the first place to look. A careful inspection of the entire fuel system for any leaks should be carried out and check tightening all fittings. It is common for a loose connection to let air enter the system but not leak fuel.