Warranty
The owner of the engine is responsible for all safety 
and maintenance checks as well as for following the 
maintenance instructions as set forth in this manual and 
on the Silverwake warranty booklet. The performance and 
reliability of your engine depend on you following these 
instructions.
Maintenance should be entrusted to a specialist authorised 
by Nanni Diesel. The validity of the warranty is dependent 
on maintenance operations being carried out by an 
authorised representative. 
Wear and tear on parts as well as maintenance costs 
arise from normal use of the engine and therefore do not 
constitute manufacturing or material faults under the terms 
of the warranty. 
We strongly advise against making any changes to 
the engine’s settings, as well as any other technical 
modification (accessories, spare parts, hitched equipment 
etc.) not authorised by Nanni Diesel. 
Any modification will cause the warranty to be cancelled as 
we cannot be held liable for work carried out beyond our 
control.
Environmental responsibility 
Nanni Diesel designs its engines to have minimum 
environmental impact and a maximum service life. This 
objective, however, can only be achieved with your full 
cooperation. Our operating and maintenance instructions 
aretohelpyoutoprotectyourengineandadoptresponsible
behaviour vis-à-vis the environment.
Ensure you only use the fuels and oils recommended in this 
manual. Using another type of fuel or oil could cause major 
generator malfunctions: higher consumption, reduced 
engine service life, greater discharge of exhaust gases. 
When draining the oil and changing the oil or fuel filter, 
dispose of the waste in the appropriate container. These 
fluids cause major damage to flora and fauna if discharged 
into nature. Ask the pump attendant for an absorption kit 
in the event of accidental discharge of oil or fuel into the 
water.
The different fluids used to run the engine are a health 
hazard. Carefully read the instructions on the packaging of 
these products and always check that the ventilation in the 
storage compartment is adequate.
 
Preparations before starting:
When the engine has been installed on board and before 
removing the protective elements covering the different 
orifices,clean the exterior surface of the propulsionsystem. 
For transportation reasons, some of our engines are 
delivered without their operating fluids. In all cases, you 
must:
• Check the levels and fill the engine oil if necessary.
• Fill the exchanger with coolant and degas if necessary.
• Check the belt tension.
• Check the tightness of the different connections and 
drain caps (coolant and oil).
• Check the tightness of the alternator electrical lugs 
(check the cabling by referring to the corresponding 
documentation), battery terminals, circuit breaker, 
connection of extension sections, battery electrolyte 
level.
• Make a final check of the fixing elements and a visual 
check of the engine as a whole.
• Check the operation of the ventilation system.
Some of these operations are explained in more detail later 
in this manual. 
I Attention! : The modern diesel engine is precision 
equipment that requires the use of a high-quality fuel and 
lubricant. 
Fuel supply
Ensure that the fuel contains no residues. If it does, use 
special filters.
Avoid using fuel mixed with water or other substances as 
you may damage the engine.
The engine performance is influenced by the fuel 
temperature, the temperature and relative humidity of the 
exhaust air and by the altitude.
Behaviour of the boat 
The weight distribution on board can modify the centre of 
gravity of the boat and have an impact on its behaviour in 
navigation. 
The condition of the hull is also a critical factor. Adirty and / 
or damaged hull will modify the behaviour of the boat.
The propeller must be adapted to the boat and the use that 
is made of it. A faulty operation of the boat is often due 
to an inadequate and / or damaged propeller. 
7
Presentation