Nanni N2.10 User manual

Nanni marine engine
Operator’s manual
Engines
N2.10
N2.14
N3.21

CONTENTS
1
Introduction............................. 1
About this manual.........................2
Safety........................................ 3
Emergency kit ..............................3
Safety alert symbols .....................3
Safety icons ..................................4
Safety precautions .......................5
About the engine ..........................9
Overview.................................. 9
About the propeller .....................14
Behaviour of the boat .................14
Engine main components ..........15
Instruments panel................. 19
Standard panel ...........................19
Instrumentation ..........................20
Operation ............................... 25
Before starting ............................25
Starting the engine .....................26
During operation ........................28
Stopping the engine ...................30
Maintenance .......................... 32
Service schedule.........................33
General inspection......................35
Fuel system ................................37
Lubrication system .....................41
Cooling system ..........................43
Raw water system ......................47
Electrical system ........................53
Battery ........................................52
Corrosion protection ...................54
Long term storage ......................57
Troubleshooting.................... 59
Technical data ....................... 61

Thank you for choosing a Nanni product!
Contact a Nanni authorized dealer for the servicing of your product. A list of
dealers can be found on our web site:
www.nannidiesel.com
Nanni engines are the product of many years of experience in the deve-
lopment of marine engines and equipment designed for use in open seas.
Your engine is built with the finest materials in accordance with precise
specifications and strict production methods.
Before operating the engine, make sure that this manual is applicable to the
engine. Refer to the Identification plate if you are not sure about the engine
model designation. If you don’t have the correct manual, please contact
your Nanni authorized Dealer.
Correct installation of the engine on your boat is of the greatest importance
for safe navigation and protection of the environment. The installation
should be carried out by an authorized Nanni workshop in accordance with
the installation instructions.
1
INTRODUCTION
2

About this manual
This Operator’s Manual contains
important information, tips, sugges-
tions and warnings. We urge you
to read it carefully and familiarize
yourself with the engine before
starting.
For your own safety and longer
service life of the engine, follow
the instructions and warnings
contained in this manual and in all
documentation provided with the
boat. Ignoring them could result in
damage to the engine or personal
injury to you or others.
Please ensure that this Manual is
always kept in the boat. It should
always be available to anyone
else using the engine, i.e. anyone
renting, borrowing or buying the
engine from you. Throughout the
document, the following symbols
are used to ease the reading:
Indicates that the text is conti-
nued on the following page.
Indicates the end of a section.

Content and updates
All the informations and specifica-
tions in this Manual are based on
the technical data applicable at the
time of its publication. Changes and
updates may be made by Nanni
without notice.
Illustrations are intended as a
general guide, and may vary from
the equipment fitted in the engine in
some details. Some sections of the
Manual do not apply to all engines.
If this is the case, a text indicates
which engines it applies to.
If there are any equipment details
that are not shown or described
in this Operator’s Manual, or if
you have any questions about the
operation of any equipment, your
authorized Nanni Dealer will be
glad to inform you of correct care
and operating procedures.

2

Read this chapter carefully as it
concerns your safety. Most acci-
dents are caused by failing to follow
basic safety rules. Be aware of the
possible risks involved in handling
the engine and make sure to take
the necessary precautions to pro-
tect yourself, those around you and
the equipment.
Read all informations supplied with
the boat before starting the engine
for the first time.
Always ensure that the mainte-
nance of the boat and all equip-
ment has been done in accordance
with the instructions stated in the
relevant Manual. Have all mandato-
ry and necessary safety equipment
handy in the boat and serviceable.
Emergency kit
You can order an emergency kit
from any Nanni authorized dealer.
The engine emergency kit contains
several components to carry out
simple repair in the event of a fault.
Always have an complete emer-
gency kit onboard and necessary
tools to carry out any repairs.

Safety alert
symbols
General rules of safety precautions
to follow are indicated in this Ma-
nual. They are indicated as follows:
IDANGER
Indicates a hazardous situation
which, if not avoided, will result
in death or serious injury.
IWARNING
Indicates a hazardous situation
which, if not avoided, could re-
sult in death or serious injury.
ICAUTION
Indicates a hazardous situation
which, if not avoided, could re-
sult in minor or moderate injury,
or could cause property damage.
NOTICE: Indicates important infor-
mation in order to facilitate handling
or avoid property damage.

3
SAFETY
3

Safety icons
Several stickers are fixed directly
on the engine. They are intended
to help you to quickly identify the
location of certain components
and avoid possible hazards when
working on the engine.
Ensure these stickers are always
visible and change them if neces-
sary.
Refers to important infor-
mations and instructions to follow
before handling the engine.
Indicates possible electrical
hazards.
This icon indicates a risk of
fire.
Indicates hot parts entailing
substantial risks of burns.
Indicates an area containing
pressurised fluids.
Stipulates that no flames or
sparks should be created in the
vicinity.
Indicates hazardous rotating
parts.
Indicates the de-aeration
orifice(s) (air bleed).
Indicates where to check the
coolant level.
Indicates where to check the
engine oil level.
Indicates the coolant drain
orifice.
Indicates the oil drain orifice.

4

Safety
precautions
Exhaust gas
Exhaust gases contain carbon
monoxide. This colourless and
odourless gas is extremely har-
mful and could lead to poisoning
which could result in loss of
consciousness or death. The first
symptoms of carbon monoxide
intoxication are as follows:
• Dizziness
• Nausea
• Headache
• Throbbing temples
• Vomiting
• Fatigue and falling asleep
• Tense muscles
If you or anyone else in the vicinity
of the engine experiences any of
these symptoms, leave the area
of operation of the engine and find
fresh air. If the symptoms persist,
consult a doctor and have the en-
gine checked.
Ensure the exhaust circuit correctly
expels the gas produced by the
engine. Regularly check that the
exhaust circuit is free of leaks and
that the exhaust elbow is in good
condition.
Burns
Never touch the hot parts of the
engine! An operational engine gets
very hot: the exhaust system, tur-
bocompressor (if equipped), starter,
oil sump, oil, coolant in the hoses
and pipes are hot and can burn.
Fluids ejected under pressure can
cause serious injury. Release all
the pressure in the circuits before
removing the caps. Never open the
oil circuit and coolant caps when
the engine is operational and/or
hot. Never start or run the engine
when the oil fill and coolant caps
are not screwed on as hot oil or
coolant could spray out.
If you come into contact with any
of these fluids, consult a doctor
immediately. If the engine gets too
hot, switch it off and disconnect it
and wait for it to cool down before
checking for failure.
Fire
Do not smoke near the engine and
keep it away from sources of igni-
tion (flames or sparks) or any other
potential flammable vapour or liquid
sources. Do not run the engine
without the air filter.
Do not run the engine in an area
in which flammable or explosive
materials are stored or where gas
is present. Ensure there are no
flammable liquids in the engine
compartment.
5

Immediately clean up any liquids
spilled and keep the engine com-
partment clean and accessible so
as to minimise the risk of fire. Be
careful as fuel can burn. Damaged
pipes can lead to fire.
Explosion
Explosions caused by fuel vapour
can cause serious injury! Carefully
follow the safety rules when filling
the fuel.
Open and ventilate the storage
area of the engine after filling.
Check that there are no fuel va-
pours or leaks before starting the
fan (if fitted). Switch the fan on for 5
minutes before starting the engine.
All fuel vapours are flammable
and explosive. Be careful when
handling and storing fuel. Store
the fuel in a ventilated area away
from sources of ignition (sparks
or flames) and out of the reach of
children.
Stop the engine before filling with
fuel or lubricant. Do not smoke near
the engine and keep it away from
sources of ignition (flames) when
filling with fuel and/or lubricant.
Wear gloves when investigating
possible leaks.
Do not alter or damage the fuel cir-
cuit. Close the fuel circuit whenever
you work on it. Ensure you always
have an appropriate working fire
extinguisher to hand.
Hazardous Voltage/
Electrical Shock
Electrocution is possible whenever
electricity is present. Hazardous
voltage can cause severe injury
or death. Operate the engine only
when all guards and electrical en-
closures are in place.
Open the main circuit breakers
of all power sources before servi-
cing the equipment. Configure the
installation to electrically ground the
engine, transfer switch, and related
equipment and electrical circuits to
comply with applicable codes and
standards.
Never contact electrical leads or
appliances when standing in water
or on wet ground because these
conditions increase the risk of
electrocution. The voltage at these
terminals can cause death.
Short circuits can cause bodily
injury and/or equipment damage
Remove all jewellery before servi-
cing the equipment.
Hazardous backfeed voltage can
cause severe injury or death.
Connect the engine to the buil-
ding/marina electrical system only
through an approved device. Work
on the electrical circuit should only
be carried out by qualified techni-
cians.
Operations on the shore power
equipment must only be carried out
by electricians authorized to work
with high voltage installations.
6

Special attention must be brought
on boat with metallic hull, especially
concerning the protection of the
persons against electrical shock
and the protection against galvanic
and electrolytic corrosion.
Battery acid
The acid in batteries can cause
serious injury and even death!
When servicing the batteries, wear
protective gloves and goggles. Bat-
teries contain sulphuric acid which
is highly corrosive.
Acid can spurt from batteries when
they are handled. If the acid comes
into contact with the skin, rinse tho-
roughly in fresh water and consult
a doctor.
Risk of battery explo-
sion
A battery explosion can cause
serious injury and even death! En-
sure the battery storage compart-
ment is corrected ventilated.
Do not smoke near the batteries
and keep them away from sources
of ignition (flames or sparks). They
produce hydrogen which could
ignite or explode on contact with an
electrical arc or a flame.
Switch off all electrical appliances
in the vicinity when you are working
on the batteries.
Ventilate correctly storage batteries
compartment. Avoid touching the
battery terminals with metal tools
so that no sparks are created which
could cause an explosion. Remove
the rings, bracelets and necklaces
before handing the batteries.
Rotating parts
Rotating parts can be extremely
dangerous and cause serious injury
and even death!
Do not work on the engine when
it is operational. If work on the
engine when running is absolutely
necessary, do not touch any hot or
rotating parts.
Baggy clothing, hair or objects
could be pulled in and/or caught
and cause serious injury or subs-
tantial property damage.
Do not wear bracelets, necklaces
or rings when working on a engine.
Check that the bolts and screws
are properly tightened and that
the protection mechanisms are in
place. Do not check the tension of
the alternator belt when the engine
is operational.
7

Accidental starting
Accidental starting can cause se-
rious injury and even death!
Disconnect the battery before wor-
king on the engine. Ensure no one
is alongside the engine or working
on before starting it. A rotating
propeller can cause serious injury
or death. Ensure all the protection
mechanisms are in place before
starting the engine.
Chemical products
The different fluids used to run the
engine are a health hazard. Ca-
refully read the instructions on the
packaging of these products and
always check that the ventilation in
the hold space is adequate.
Follow environmental regulations
concerning the disposal of oil, fuel,
coolant, filters and batteries. Do
not put your hands over pipes when
looking for possible leaks.
Water ingress
The engine should be protected
against from water ingress by any
means. Water ingress leads to
complete engine failure. This is not
cover under any warranty terms.
Water can enter the engine after
filling the exhaust system.
Correct installation of the engine on
your boat is of the greatest impor-
tance for safe navigation and pro-
tection of the environment. The first
protection against water ingress is
a correct installation of the engine.
A correct use of the engine is also
important to protect the engine
against water ingress. The ope-
rator/owner is responsible for the
correct operation of the engine and
for the implementation of all neces-
sary means to protect the engine
against water intrusion.
After a vessel capsizing, or if the
engine has been filled with water,
do not start the engine, except in
extreme emergencies, and contact
an authorized Nanni dealer.
8

About the engine
Engine identification
Both the engine and the transmis-
sion has an identification plate that
contain several informations.
Keep these plates accessible and
in good condition. Record and keep
the engine and transmission serial
number and designation. These
numbers should always be quoted
when ordering service and replace-
ment parts.
The engine identification plate is as
follow:
• TYP indicates the commercial
designation of the engine.
• NR indicates the engine serial
number.
• CODE lists various specifications
of the engine.

Break in
Operate the engine with care for
the first 50 hours of operation.
Do not race the engine while it is
cold. Do not operate it at full load
except for short periods. Never
run the engine at constant engine
speed for long periods during the
break in period.
Check the oil and coolant level
frequently during the running-in
period. The oil consumption can be
more important during the running-
in period.
Engine installation
The installation must be carried out
by an authorized Nanni workshop
in accordance with the installation
instructions. Correct installation
of the engine is of the greatest
importance for safe navigation and
protection of the environment.
It also ensure maximum service life
under normal conditions of use.
Engine damage caused by failure
to follow installation instructions is
not covered by the warranty.
9
OVERVIEW
4

Remote Control
The remote control is an optional
extra not in the scope of supply
of the engine. The remote control
installed on the boat can be diffe-
rent than the ones shown in this
document.
On most boats, the control lever
controls both the engine rpm and
the gear shift (ahead / astern).
However, some boats can be
equipped with a separated shift
command.
It can also be fitted with a neutral
safety switch that prevents the
engine from starting until the lever
is in neutral position.
Consult the boat builder or your
Nanni dealer if you are not sure
about the operation of the remote
control.
Power Take Off
Some engines can be fit with a
Power Take Off system. This sys-
tem allows to power accessories
like bilge pump, watermaker, etc.
NOTICE: Any mechanical power
taken from the engine from a PTO
reduces the power delivered to the
propeller. The use of a PTO should
always be studied and approved
by the R&D department of Nanni
Industries S.A.S France. Contact
your Nanni dealer for more informa-
tions.
Trolling valve
The Trolling valve system allows
to reduce the rotation speed of the
propeller below its speed when the
engine is at idle. The boat speed is
reduced by 30% to 70%.
ICAUTION
The Trolling valve system must
never be used for manoeuvring.
It also must never be used at an
engine speed of more than 1200
rpm.
10

Operation in cold
weather conditions
Nanni engines are designed to ope-
rate effectively in cold weather.
However, for effective starting
and cold weather operation, extra
care are necessary. Contact your
Nanni dealer for additional infor-
mation and local availability of cold
weather aids.
WINTER GRADE FUEL
Winter grade fuel allows to protect
the injection system when tempera-
tures fall below 5°C (40°F). Winter
grade fuel is best suited for cold
weather operation thanks to its
lower cloud and lower pour points.
However, using winter grade fuel
may reduce power and fuel efficien-
cy as winter grade fuel has a lower
BTU (heat content) rating. Check
the grade of fuel being used before
troubleshooting for low power com-
plaints in cold weather operation.
In all cases, fuel quality and fuel
sulfur content must comply with all
existing emissions regulation for the
area in which the engine operates.
Oil viscosity
Use seasonal grade viscosity
engine oil based on the expected
air temperature range between oil
changes.
Follow the diagram below to adapt
the oil viscosity:
50 C
SAE 5W-30
SAE 10W-30
SAE 15W-40
SAE 15W-40
o
40 C
o
30 C
o
20 C
o
10 C
o
0 C
o
-10 C
o
-20 C
o
-30 C
o
-40 C
o
122 F
o
50 F
o
32 F
o
14 F
o
-4 F
o
-22 F
o
-40 F
o
104 F
o
68 F
o
86 F
o
As an option, some engines are
available with an air intake hea-
ter to aid cold weather starting.
Contact your Nanni dealer for more
informations.
11

Engine homologation
The engine type can be exhaust
emission certified. It means that
Nanni guarantees that all engines
of the same type that are manufac-
tured are approved and certified by
the authorities in accordance with
different exhaust emissions stan-
dards.
However, for the engine to be in ac-
cordance with this standards, spe-
cial requirements for maintenance
and service are to be followed:
• Only Nanni replacement parts
must be used.
• Maintenance intervals must be
observed.
• The engine must not be modified
in any way except with accesso-
ries and service kits approved by
Nanni Industries S.A.S. France.
• Service of the fuel system must
always be carried out by an au-
thorized Nanni workshop.
• No modifications to the air intake
and exhaust system may be
undertaken.
• Seals may only be broken by
authorized personnel.
• The operation instructions stated
in the relevant manuals should
be follow by the user.
Nanni’s responsibility for the engine
specification being in accordance
with the certification will be invali-
date if one or several of this condi-
tions are not followed.
Environmental
responsibility
Nanni designs its engines to have
minimum environmental impact.
This objective, however, can only
be achieved with your full coopera-
tion.
Our operating and maintenance
instructions are to help you to pro-
tect your engine and adopt environ-
mentally responsible behaviour.
Ensure you only use the fuels and
oils recommended. Using ano-
ther type of fuel or oil could cause
major malfunctions, an higher fuel
consumption, a reduced engine
service life, and a greater discharge
of exhaust gases.
When draining the oil and changing
the oil or fuel filter, dispose of the
waste in an appropriate container.
These fluids cause major damage
to flora and fauna if discharged into
nature. Use an absorption kit in the
event of accidental discharge of oil
or fuel into the water.
12

Warranty
This manual is supplemented by
a Warranty Information Booklet.
We recommend that you read this
publication thoroughly.
Pay special attention to the appli-
cable duty cycle and to the limita-
tions that result. Failure to comply
with the warranty conditions will
void the Warranty.
The validity of the Warranty is also
dependent on proper installation
and maintenance operation being
carried out by an authorized Nanni
representative.
NOTICE: Late or improper mainte-
nance or use of spare parts other
than Nanni original spare parts will
invalidate Nanni’s responsibility for
the engine accordance with homo-
logation and will void the Warranty.
Modifications to the engine’s set-
tings, as well as any other tech-
nical modification (accessories,
spare parts, additional equipment,
etc) ARE FORBIDDEN WITH-
OUT WRITTEN AUTHORIZATION
FROM NANNI INDUSTRIES S.A.S.
Any modification will void the War-
ranty. Damage caused by failure
to follow operation instructions or
incorrect operation is also not cove-
red by the warranty.
Commissioning
inspection
Commissioning inspection is a
condition of the validity of the Limi-
ted Warranty. Moreover, it allows
the registration of the product at the
factory and record important infor-
mations regarding the product.
By registering the product, you will
receive the best warranty coverage
possible and Nanni will be able to
contact you in the event of updates
or service notifications.
Operations to be performed during
commissioning inspection are spe-
cified in the Warranty Booklet. The
commissioning inspection must be
signed by the seller and the owner
of the engine.
It’s the owner responsibility to
control that the commissioning
inspection has been fully comple-
ted and signed by the person who
carried out the inspection.
The informations regarding the
RPM must be taken using an elec-
tronic tachometer. Never use the
tachometer of the instrument panel
for this purpose.

13

About the
propeller
The propeller is a critical compo-
nent of the propulsion system. It
converts the engine power in thrust.
To be efficient, the propeller must
be perfectly adapted to the boat
and to its use.
In all cases, the propeller should
allow the engine to reach its rated
rpm with the maximum boat load.
A faulty operation of the engine is
often due to an inadequate and / or
damaged propeller.
Behaviour of the
boat
If this is your first boat or if you are
not familiar with the boat, we urge
you to practice controlling the boat
at slow speed as a first step.
Avoid violent manoeuvres or
unexpected speed changes while
sailing. People can fall over or
overboard.
Keep also in mind that the weight
distribution (passengers, equip-
ments, etc.) inside the boat has
an impact on the behaviour of the
boat when cruising. Depending the
position of the load, the behaviour
of the boat may change, particularly
in the case of a planning hull.
The condition of the hull and the
propeller is also a critical factor. A
dirty and / or damaged hull will mo-
dify the behaviour of the boat and
therefore the engine performance.
It can also cause cavitation which
can seriously erode the surface of
the propeller, the drive, etc.
14

Engine main components
NOTICE: The engine may not be exactly as represented here. Some com-
ponents may not be part of the engine ordered.
P/N COMPONENTS
1 Alternator
2 Alternator belt
3 Starter
4 Fuses box
5 Air filter
6 Fuel filter
7 Fuel feed pump
8 Fuel injection pump
9 Heat exchanger
10 Coolant filler plug
11 Coolant pump
12 Recovery tank
13 Coolant drain plug
14 Raw water pump
15 Oil filter
16 Oil filler port
17 Oil gauge
18 Water cooled exhaust elbow
19 Transmission
15

N2.10
16
1
5
2
3
11
13
14
15
12 16
18
7
17
8
9
10 4
6
19

N2.14
17
1
5
2
3
6
11
13
14
15
12 16
18
7
17
19
8
9
10 4

N3.21
18
1
5
2
3
6
15
18
7
8
9
10
4
11
12
13
14
16
17
19