User manual
Page 23 sur 24
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If starting up the engine using an external service
battery and jumper cables, proceed as follows :
-Connect the service battery to the main battery by
connecting the + to the + and the – to the -. Once the
engine has started up, remove the jumper cables and do
not switch off the main battery circuit.
You must disconnect the two battery cables when :
-you use a battery charger other than that of the boat.
-before intervening on the electrical equipment.
-before performing any welding work on a metal hull.
Alternator belt (see page A-4)
Regularly check the tensions of the alternator belt
2
.
Tension the belt between the pulleys in accordance with
the tension or deflection given in the technical
characteristics (appendices pA-2) using a DENSO
meter.
Zinc anode (see page A-4)
A zinc anode
23
forms part of the exhaust elbow
22
. It
serves as an anticorrosion anode. The anode must be
replaced when more than 50% of it has been consumed.
Refer to its dimensions in the technical characteristics
(appendices pA-6)
Control unit: inspection of accelerator/gearbox and
trolling cables, general lubrication.
Inspect the cables and check that they are not shredded
or loose. Grease the connections.
Servicing performed by dealer:
This section details a few operations which must be
performed by a qualified technician approved by
NANNI INDUSTRIES, except in an emergency
situation.
Cleaning of air filter
(see page A-5)
:
Remove the clamp from the hose and remove the
filter
10
.
Remove the spring inside the filter. If necessary, clean
the filter by washing it with soapy water. Then, rinse the
filter with clear water. Press the filter to remove any
water and to dry it.
NANNI DIESEL has designed a cleaning kit which is
suited to certain models of the air filter.
Use of this kit is recommended on our engines to
perform effective cleaning and ensure good engine
"breathing".
Be sure no impurities get into the engine.
Fuel filter (see page A-5) :
Replacement of fuel filter
The fuel filter
20
is a throw-away type filter. The
fireguard envelope and the water probe must be
preserved and reinstalled correctly (if equipped). The
fire guard must not come into contact with the plastic
purge screw.
-Close the fuel valve.
-Unscrew the cartridge from the filter head.
-Coat the seal of the new cartridge with clean oil.
-Screw the new cartridge on the filter head, then tighten
by hand by ¾ turn (do not use a tool). Reinstall the
probe and the purge screw (if equipped). Check the seal.
-Open the fuel valve.
-Purge the circuit.
-Start up the engine and check for any leaks.
Always sponge up any fuel which may have spilled
Observe the environment protection rules.
Replacement of air filter
10
(see page A-5) :
On certain engine models, the air filter must be
replaced.
Replacement of fuel air prefilter :
The fuel prefilter
PF
is an optional equipment.
Close the fuel valve at the fuel tank. Place a recipient
under the fuel prefilter. Remove the filter bowl by
loosening the corresponding screw. Empty and drain the
filter bowl. Replace the cartridge and reinstall the filter
bowl. Open the fuel valve. Purge the supply system.
Start up the engine and check for any leaks.
Dispose of the old fuel cartridge in an
appropriate refuse treatment center.
Replacement of seawater pump rotor :
See page A-5
Close the seawater intake valve as there is a risk of
water penetrating into the engine.
-Close the seawater intake valve.
-Close the seawater pump cover
34
-Using a channel lock pliers, remove the worn rotor.
- If the rotor shows any signs of cracks or defects, it
should be replaced.
-Clean the parts preserved.
-Fit a new rotor by applying a clockwise rotary
movement.
-Install the seawater pump cover using a new seal.
-Open the seawater intake valve.
-Startup the engine and check for any leaks in the
circuit.
