WhisperPower M-SC6 User manual

USERS MANUAL
M-SC6 / 8 / 10
- 3000 RPM -
Marine diesel generating set 230V / 50Hz
Digital Diesel Control
V1. December 2010
Art.nr. 40200351
WHISPER POWER BV
Kelvinlaan 82
9207 JB Drachten
Netherlands
Tel.: [phone]
Fax.: [phone]
www.whisperpower.eu

CONTENTS
2December 2010 / M-SC6/8/10 / EN
CONTENTS:
1INTRODUCTION.............................................................................................................................................................. 4
1.1 General .............................................................................................................................................................. 4
1.2 Service and maintenance................................................................................................................................... 4
1.3 Guarantee .......................................................................................................................................................... 4
1.4 Liability ............................................................................................................................................................... 5
1.5 Identification ....................................................................................................................................................... 6
1.5.1 General.............................................................................................................................................. 6
1.5.2 Identification plate ............................................................................................................................. 6
2INFORMATION................................................................................................................................................................ 7
2.1 Safety ................................................................................................................................................................. 7
2.1.1 General.............................................................................................................................................. 7
2.1.2 Electrical safety ................................................................................................................................. 7
2.1.3 Earth insulation failures ..................................................................................................................... 7
2.1.4 Installation ......................................................................................................................................... 7
2.1.5 Operation........................................................................................................................................... 8
2.1.6 Fire and explosion ............................................................................................................................. 8
2.1.7 Chemicals.......................................................................................................................................... 8
2.2 Transport, lifting and storage.............................................................................................................................. 9
2.3 The M-SC6/8/10 ................................................................................................................................................. 9
2.3.1 Features ............................................................................................................................................ 9
2.3.2 Remote control .................................................................................................................................. 9
2.3.3 Documentation .................................................................................................................................. 9
2.3.4 Accessories included in the standard delivery................................................................................... 9
2.4 Components ..................................................................................................................................................... 10
2.4.1 Main components to identify............................................................................................................ 10
2.4.2 Generator control panel................................................................................................................... 13
2.4.3 Remote control panel ...................................................................................................................... 13
2.5 Technical Information ....................................................................................................................................... 13
2.5.1 AC alternator ................................................................................................................................... 13
2.5.2 Engine ............................................................................................................................................. 13
2.5.3 Digital Diesel Control system........................................................................................................... 13
2.5.4 Battery charger................................................................................................................................ 14
2.5.5 Alarms and shut down ..................................................................................................................... 14
2.5.6 Control............................................................................................................................................. 14
2.5.7 Remote control ................................................................................................................................ 14
2.5.8 Hour counter.................................................................................................................................... 14
2.5.9 Load indicator.................................................................................................................................. 14
2.5.10 Fuel specification............................................................................................................................. 14
2.5.11 Oil information ................................................................................................................................. 14
2.5.12 Cooling liquid................................................................................................................................... 14
2.5.13 Technical data ................................................................................................................................. 15
2.5.14 Wiring codes and colours ................................................................................................................ 16
2.5.15 Lay out control wiring....................................................................................................................... 17
2.5.16 Electrical diagram 230 V AC / 50 Hz ............................................................................................... 18
2.6 Diagram electronic governor ............................................................................................................................ 19
3OPERATION.................................................................................................................................................................. 20
3.1 General ............................................................................................................................................................ 20
3.2 Operating Instructions ...................................................................................................................................... 20
3.2.1 Summarised operating instructions (daily use)................................................................................ 20
3.2.2 Extended operating instructions ...................................................................................................... 21

CONTENTS
EN / M-SC6/8/10 / December 2010 3
4MAINTENANCE............................................................................................................................................................. 23
4.1 Alternator.......................................................................................................................................................... 23
4.2 Engine .............................................................................................................................................................. 23
4.2.1 Preliminary instructions ................................................................................................................... 23
4.2.2 Bleeding fuel lines ........................................................................................................................... 23
4.2.3 Valve clearance............................................................................................................................... 23
4.2.4 Replacing fuel filter .......................................................................................................................... 23
4.2.5 Replacing oil filter ............................................................................................................................ 23
4.2.6 Readjustment of the V-belt .............................................................................................................. 24
4.3 Regular maintenance ....................................................................................................................................... 24
4.3.1 Maintenance schedule..................................................................................................................... 25
4.3.2 Putting out of service ....................................................................................................................... 26
5TROUBLE SHOOTING.................................................................................................................................................. 27
5.1 Alternator/ electrical faults ................................................................................................................................ 27
5.1.1 General............................................................................................................................................ 27
5.1.2 Trouble shooting table ..................................................................................................................... 27
5.2 Engine faults..................................................................................................................................................... 29
5.2.1 General............................................................................................................................................ 29
5.2.2 Trouble shooting table ..................................................................................................................... 29
5.2.3 Warnings ......................................................................................................................................... 32
5.2.4 Service address............................................................................................................................... 32
5.3 Special procedures alternator........................................................................................................................... 33
5.3.1 Residual voltage check / excitation procedure ................................................................................ 33
5.3.2 Testing rotary rectifier diodes .......................................................................................................... 33
5.3.3 Winding resistant values.................................................................................................................. 34
5.3.4 Meggering ....................................................................................................................................... 34
5.4 Special procedures engine ............................................................................................................................... 34
5.4.1 Setting the RPM .............................................................................................................................. 34
5.4.2 Adjusting valve clearance and retightening the cylinder head bolts. ............................................... 35
5.4.3 Measuring exhaust backpressure.................................................................................................... 36
5.4.4 Disassembling instructions .............................................................................................................. 36
6SPARE PARTS LIST..................................................................................................................................................... 38
MAINTENANCE LOG ............................................................................................................................................................... 40

INTRODUCTION
4December 2010 / M-SC6/8/10 / EN
1 INTRODUCTION
1.1 GENERAL
The M-SC6/8/10 Marine Diesel Generating set is
manufactured and marketed by WhisperPower.
It is important to read this manual before installing and
operating the generating set. Both safety and durability
rely very much on the correct identification, installation and
a good understanding of ratings, features, design,
maintenance and operation procedures.
The information, specifications, illustrations and
statements contained within this publication are given with
our best intentions and are believed to be correct at the
time of going to press.
All of the specifications, provisions and instructions
contained in this manual apply solely to standard versions
of the WhisperPower M-SC6, 8 and 10 generating set.
This manual is valid for the following models:
Part
number Description
41102005 M-SC6 230V 3000rpm
41102006 M-SC6 230V 3000rpm - ungrounded
41103005 M-SC8 230V 3000rpm
41103006 M-SC8 230V 3000rpm - ungrounded
41104005 M-SC10 230V 3000rpm
41104006 M-SC10 230V 3000rpm - ungrounded
For other models see other manuals available on our
website: www.whisperpower.eu.
Our policy is one of continued development and we re-
serve the right to amend any technical information with-out
prior notice. Whilst every effort is made to ensure the
accuracy of the particulars contained within this publication
neither the manufacturer, distributor, or dealer in any
circumstances shall be held liable for any inaccuracy or
the consequences thereof.
WARNING
A warning symbol draws attention to special
warnings, instructions or procedures which, if
not strictly observed, may result in damage or
destruction of equipment, severe personal
injury or loss of life.
DANGER
This danger symbol refers to electric danger
and draws attention to special warnings,
instructions or procedures which, if not strictly
observed, may result in electrical shock which
will result in severe personal injury or loss of
life.
1.2 SERVICE AND MAINTENANCE
Regular service and maintenance should be carried out
according to the directions in this manual. For service and
maintenance one can appeal to the manufacturer or the
dealers.
1.3 GUARANTEE
WhisperPower guarantees that this generating set has
been built according to good workmanship, according to
the specifications in this manual and according to
European Community safety regulations.
During production and prior to delivery, all of our
generating sets are tested and inspected.
The correct functioning of this generating set is subject to
guarantee. The period and conditions of this guarantee are
laid down in the general conditions of delivery as
registered with the Chamber of Commerce and Industries
for the North of the Netherlands number 01120025 are
available on request. The guarantee period is two years,
limited to 1000 running hours. Some aspects of our
guarantee scheme are given here in more detail:
Guarantee period 1000 running hours or 24 months
whichever occurs first. Warrantee does not cover failures
that are caused by misuse, neglect or a faulty installation.

INTRODUCTION
EN / M-SC6/8/10 / December 2010 5
Example 1. Faulty installation:
Seawater entering the engine is the most common cause
of damage to combustion engines in boats. (Both to
propulsion and generator engines.) The entry of water
must be avoided under all conditions. Be aware that the
conditions in blue water sailing can be extreme. Refer to
the installation manual for instructions but remember these
are for guidance only as many factors influence the
installation of a generator. The ultimate responsibility will
always be with the owner to ensure a safe and compliant
installation. If in doubt ask!
DAMAGE CAUSED BY THE INGRESS OF
WATER IS NEVER COVERED BY
WARRANTEE
Example 2: Misuse:
Long term running with no load or too little load can cause
the exhaust to get choked with soot or carbon. Cleaning
the exhaust is not covered by warrantee.
Example 3: Neglect
Sometimes the seal of the raw water pump starts leaking.
Mostly this begins with a little drip and slowly gets worse.
Regular visual inspection of the generator is necessary to
prevent damage to occur from a leaking water pump.
When one find serious damage after weeks of neglect
warrantee claims will not be honoured.
Example 4: Neglect
Whisper generators have an option for an auto start/stop
mode or interval mode.
WhisperPower cannot be held responsible for damage
caused by the unattended running generator.
Guarantee means that faulty parts are repaired or
replaced free of charge. If necessary the whole generator
unit will be exchanged. Labour necessary to complete
repairs on board a vessel executed by an authorized
service engineer is covered, but is limited to a reasonable
number of hours and reasonable rates in relation to the
actual repair work that has to be done.
Travel expenses and travel hours are not covered. Also
not covered is the labour required to take a generator out
of a boat or for reinstallation. There is no cover for labour
needed to get access to the generator, for example to
remove equipment or bulkheads etc.
Goods to be delivered under warrantee will be invoiced.
Only after the faulty goods are returned will the invoice be
credited. Payment in advance may be required or
guaranteed by credit card. If after the faulty goods are
returned, it is indicated that the failure was not covered by
guarantee a credit will not be issued. For example if a
Printed Circuit Board is returned with clear damage
caused by seawater, guarantee will be refused.
Freight costs to deliver spares by normal mail or carriers is
covered under guarantee. Special services like express
mail, overnight delivery etc. are not covered. Taxes and
duties are not covered. For shipments to remote off shore
areas any additional costs incurred over normal carriage
will be invoiced to the customer.
The cost for returning faulty goods is not covered under
guarantee.
If any problem arises which could be subject of guarantee,
procedures should be followed as described in the
guarantee certificate, unauthorised repairs could lead to
further damage and violate the guarantee conditions.
Should work take place, which is not in
accordance with the guidelines, instructions
and specifications contained in this user’s
manual and the supplementary installation
manual, then damage may occur and the
generating set may not fulfil its specifications.
In all these cases the guarantee may become
invalid. Use original spareparts only!
1.4 LIABILITY
WhisperPower does not accept responsibility for damage,
injuries or casualties which are the result of operation of
the generating set in specific conditions which brings
dangers which could not be foreseen, or could be avoided
by additional measures. WhisperPower does not accept
liability for damage due to use of the generator, possible
errors in the manuals and the results thereof.
Automatic start/stop
WhisperPower cannot be held responsible for damage
caused by the unattended running generator using the
auto-start/stop mode or interval mode.

INTRODUCTION
6December 2010 / M-SC6/8/10 / EN
1.5 IDENTIFICATION
1.5.1 General
Before using this generating set it is very important to
identify the set correctly. To communicate for service or
ordering parts it is also essential to correctly identify the
generating set. Also for the daily operation of the genera-
ting set it is necessary that the operator knows the correct
specifications.
1.5.2 Identification plate
All required identification data are on the identification
plate. For location of the identification plate see figure 1.
Figure 1: Location identification plate
1 The identity of the generating set is given by the
SERIAL NUMBER.
When this number is available the manufacturer can
trace the specifications of the generating set. On the
identification plate are also some basic features of the
set:
2 POWER
The identification plate gives the nominal maximum
continues load in kVA (= kW) calculated with power
factor one. When calculating a load one should
always take into account the power factor or cos phi
of this load. The power should never exceed the
nominal power as shown on the identification plate.
Power is rated at an ambient temperature of 40°C and
a seawater temperature of 25ºC. For higher
temperatures the generating set has to be derated.
3 VOLTAGE shows the nominal voltage.
This voltage should be within the specified tolerance
at the nominal frequency.
4 FREQUENCY is shown in Hz and is determined by
the speed of the engine (RPM). 50 Hz correlates with
3000 rpm, 60 Hz correlates with 3600 rpm.
5 CURRENT shows the maximum current that is
acceptable at the specified frequency, voltage and
power factor.
6 WEIGHT shows the net dry weight (approximately) in
kg. This is without fuel, oil, packing and external
installation equipment
7 The CE symbol shows that the generating set is build
according to European Community safety regulations.
This includes the regulations regarding the safety of
pleasure craft, machinery, electric safety and electric
magnetic compatibility (EMC) and other relevant
directives.
Safety also relies on the installation, application and
circumstances. See also the remarks in this manual under
SAFETY.
Before changing a factory setting you are advised to
consult the manufacturer. When the generating set you
have to identify is not new you have to take into account
the possibility that former users may have changed the
settings. Check the settings (voltage, frequency, rpm)
when there is any doubt.

INFORMATION
EN / M-SC6/8/10 / December 2010 7
2 INFORMATION
2.1 SAFETY
2.1.1 General
When correctly installed and used in normal
circumstances this generating set fulfils EC safety
regulations. This generating set could be part of an
installation or could be used in a way that additional
regulations of the EC or other authorities have to be taken
into account.
Circumstances could make it also necessary
to take additional measures. Be aware of wet
conditions and hazardous environments
caused by explosive gases etc
2.1.2 Electrical safety
The voltage of 230 Volt generated by this
generating set is dangerous and if instructions
and procedures are not strictly observed may
result in electrical shock which will result in
severe personal injury or loss of life.
•Check all wiring at least once a year. Defects,
such as loose connections, burned cables etc.
must be repaired immediately.
•Do not work on the electrical system if it is still
connected to a current source. Only allow
changes in your electrical system to be carried
out by qualified electricians.
•Connection and protection must be done in
accordance with local standards.
•Using the auto-start/stop (interval) mode the
generator can start unexpectedly. When
working on the electrical system, the 3 Amp
fuse must be removed from the control panel
and the battery plus cable must be removed
from the battery.
Warning signs indicate parts which could be
live.
2.1.3 Earth insulation failures
According to local regulations and depending on the
application it could be necessary to take measures for
protection against earth insulation failures.
In the standard delivery “neutral” and “ground” are not
connected. To make a connection between “neutral” and
“ground” could be necessary as part of a specific
insulation failure protection system.
Small pleasure craft in Europe is submitted to The
Recreational Craft Directive 94/25/EC. The guidelines of
this directive refer to (ISO 13297).
When the installation complies with this standard the
“neutral” and “ground” should be connected on the
generating set.
Be aware that insulation protection systems can be
different for different applications and even within the ship
there could be different standards for different spaces. We
did refer to the Recreational Craft Directive that applies to
pleasure craft up to 24 m of length. Sometimes one has to
comply with other standards such as the rules of
certification societies like Lloyds Register of Shipping or
Veritas, regulations for the protection of personal, building
legislation, etc. It is of the greatest importance to have
expert advice on this issue.
In all situations the transfer switches between
shore, inverter and generator should switch
both neutral and L1. Of course this is the case
when using a Masterswitch.
2.1.4 Installation
Whisper generating sets are not self-contained and have
to be properly installed in enclosed areas such as a
machine room.
Installation includes measures to be taken to
outlet exhaust fumes which contain carbon
monoxide and are extremely dangerous.
Carbon monoxide (CO) is an invisible odourless gas.
Inhalation produces headache, nausea or death.
Installation includes measures for proper ventilation, safe
electric connections, safe installation of the starting
battery, proper fitting of the cooling system and fuel pipes
etc. Refer to the installation manual.

INFORMATION
8December 2010 / M-SC6/8/10 / EN
2.1.5 Operation
External moving parts like fans and V-belts are covered by
the canopy and therefore the Whispers are very safe when
the canopy is closed.
Nevertheless take note of the signs on the
generating set which show symbols in a
triangle indicating danger.
When service has to be carried out while the
engine is running, be aware of moving parts
like V-belts.
•The generating set should be operated by
authorised personnel only.
•Be aware of hot parts and especially parts of the
exhaust system and the cooling system.
•If the generating set is unsafe, fit danger notices
and disconnect the battery positive (+) lead so
that it cannot be started until the condition is
corrected.
•Do not attempt to operate the generating set with
a known unsafe condition. Disconnect the battery
positive (+) lead prior to attempting any repairs or
cleaning inside the enclosure.
•Always consult the manual before carrying out
maintenance.
•Do not change the settings without consulting the
manufacturer. Keep a record of setting changes
in this manual.
2.1.6 Fire and explosion
Fuels can be flammable. Proper handling
limits the risk of fire and explosion.
•Avoid refilling the fuel tank while the engine is
running. When oil or fuel is leaking do not use the
generating set.
•Do not run the engine close to explosives or
gasses.
•Hydrogen gas generated by charging batteries is
explosive. Ensure for proper ventilation. Do not
smoke or allow sparks, flames, or other sources
of ignition around batteries.
•Keep a fire extinguisher on hand.
•Poor electrical connections or using wiring which
is not suited for the rated currents can cause
overheating and possibly fire.
2.1.7 Chemicals
•Fuels, oils, coolants, and battery electrolyte can
be hazardous to personnel if not treated properly.
Do not swallow or have skin contact with these
liquids. Do not wear clothing that has been
contaminated by fuel or lubricating oil.
•Gaskets may be manufactured from asbestos.
Particles of this material should not be inhaled as
this may result in fatal diseases.
•On no account allow any unprotected skin to
come into contact with the injector spray as the
fuel may enter the blood stream with fatal results.
•Engines may be fitted with seals or O-rings
manufactured from "viton" or similar material.
When exposed to abnormal high temperatures in
excess of 400°C an extremely corrosive acid is
produced which cannot be removed from the
skin. If signs of decomposition are evident, or if in
doubt, always wear disposable heavy duty
gloves.

INFORMATION
EN / M-SC6/8/10 / December 2010 9
2.2 TRANSPORT, LIFTING AND STORAGE
When lifting the generating set avoid any risk
of personal injuries, do not stand un-der the
generating set..
•Use soft slings to avoid damage
•On the engine are two lifting eyes, only to be
used to take the generator out of the capsule. Do
not use to lift the set including the capsule and
certainly not including the steel foundation plate !
•After transporting the generating set check for
damage before installation.
•Long term storage can have detrimental effects
on engine and alternator. The engine should be
put through an engine preservation procedure.
(Refer to the maintenance chapter).
•The alternator windings tend to condense. To
minimise condensation, store the generating set
in a dry and warm storage area.
•After removing the generating set from long term
storage perform an insulation check. (Refer to the
alternator maintenance paragraph for
procedures)
•While the battery is stored it should be recharged
every 12 weeks.
2.3 THE M-SC6/8/10
2.3.1 Features
This generating set includes a diesel engine which is
connected by close coupling to an alternator in a sound
attenuated capsule. The set is mounted on a steel base
frame and mounted securely on anti-vibration mounting
pads to the capsule base. All cables and hoses are guided
through the capsule’s left side. The set is not self-
contained and is only operable after proper installation
using additional accessories and installation materials.
Installation accessories are listed in the installation manual
and are available through the supplier of the genera-ting
set. The full automatic Digital Control is based on
microprocessor technology. Several automatic start/stop
functions can be programmed and monitored (refer to
Digital Diesel Control user manual).
2.3.2 Remote control
The full automatic remote control panel including 15 mtr
cable comes as standard with the M-SC6/8/10.
2.3.3 Documentation
Included in the delivery are:
•This user manual (number: 40200351)
•An installation manual (number: 40200361)
•A user manual for DCC (number: 40200261).
•A quick reference guide for DDC (number
40200275)
Not included in the standard delivery but available as
options are:
•Parts manual; number: 40200381 (M-SC6/8)
•Parts manual; number: 40200382 (M-SC10)
•Workshop manual; number: 40200171 (M-
SC6/8/10)
However in this manual there is a list of important parts for
maintenance and spare parts as well as a chapter on
maintenance and problem solving.
2.3.4 Accessories included in the standard
delivery
•Special hose connector for measuring exhaust
backpressure.
•Expansion tank, hose and fittings.

INFORMATION
10 December 2010 / M-SC6/8/10 / EN
2.4 COMPONENTS
2.4.1 Main components to identify
Figure 2: Front view main components M-SC6, 8 and 10
Figure 3: Front view main components M-SC6, 8 and 10
01 Fuel injection pump
02 Fuel injector
M-SC6: 2x
M-SC10: 3x
03 Glow plug
M-SC6: 2x
M-SC10: 3x
04 Alternator (12VDC)
05 Engine oil dipstick
06 Coolant drain plug
07 Oil sump hand pump
10 Air cleaner element
11 Control panel
12 Fuses
13 Digital Diesel Control
(DDC)
14 Identification plate
15 Hoist eye front
16 Injection pump air
bleeding screw
17 Engine speed adjustment
screw
18 Fuel solenoid
19 Raw water pump
20 Fuel lift pump
21 Engine oil filter

INFORMATION
EN / M-SC6/8/10 / December 2010 11
Figure 4: Rear view main components M-SC6, 8
Figure 5: Rear view main components M-SC6, 8
25 Cooling water injection
bend
26 Temperature switch
exhaust
27 Heat exchanger
28 Starter motor solenoid
29 Starter motor
30 Rubber engine mounting
31 Fuel in Ø8mm
32 Battery negative (–)
33 Battery positive (+)
34 Fuel out Ø8mm
35 Raw water inlet
36 V-belt
37 Engine coolant pump
38 Exhaust manifold
(watercooled)
40 Temperature switch
41 Thermostat housing
42 Filler cap engine oil
43 Filler cap engine coolant
44 Rocker cover
45 Hoist eye rear
46 Expansion tank
47 Bypass cooling water out
48 Bypass cooling water in
49 Generator
50 Exhaust hose Ø40mm
51 AC power output
52 Remote control
53 Engine air intake

INFORMATION
12 December 2010 / M-SC6/8/10 / EN
Fig. 6: Rear view main components M-SC10
Fig. 7: Rear view main components M-SC10
25 Cooling water injection
bend
26 Temperature switch
exhaust
27 Heat exchanger
28 Starter motor solenoid
29 Starter motor
30 Rubber engine mounting
31 Fuel in Ø8mm
32 Battery negative (–)
33 Battery positive (+)
34 Fuel out Ø8mm
35 Raw water inlet
36 V-belt
37 Engine coolant pump
38 Exhaust manifold (water-
cooled)
40 Temperature switch
41 Thermostat housing
42 Filler cap engine oil
43 Filler cap engine coolant
44 Rocker cover
45 Hoist eye rear
46 Expansion tank
47 Bypass cooling water out
48 Bypass cooling water in
49 Generator
50 Exhaust hose Ø40mm
51 AC power output
52 Remote control
53 Engine air intake

INFORMATION
EN / M-SC6/8/10 / December 2010 13
2.4.2 Generator control panel
Start / Stop
Remove fuse
Internal fuel pump
Fuse 3A
before maintenance
Digital Diesel Control
Fuse 3A
Auxiliary
Fuse 10A External Fuel Pump Fuse 3A
Observe instructions in the manual
Replace fuseswith same type and rating
Whisper Digital Diesel OperationUnit
Fig. 8: Control panel
Fig. 9: Digital Diesel Control unit
2.4.3 Remote control panel
1 Start button;
2 Stop button;
3 Select button;
4 Set button;
5 Failure lamp;
6 Generator load indicator.
7 Display
2.5 TECHNICAL INFORMATION
2.5.1 AC alternator
The single phase alternator is directly coupled, one
bearing, brushless, rotating field design, two poles (3000
RPM) and self-regulating.
Residual magnetism causes a small voltage over the
stator windings and allows a current to flow in the
windings, which is magnified because of the feedback
effect between rotor and stator. The field windings in the
rotor are short-circuited over a diode to rectify the current.
A capacitor over an additional winding in the stator which
is at an angle with the power-winding keeps the voltage
stable within 5 % at the specified rpm and provides voltage
fall off with speed, preventing over-excitation at low engine
speeds and softening the effect of load switching to relieve
the burden on the engine. The M-SC8 and 10 can be
equipped with an optional voltage regulator to keep the
voltage tolerance within 2%.
Further technical data on the design of the alternator can
be found in drawings and diagrams in this manual.
2.5.2 Engine
The M-SC6 and 8 generating set is based on the
Mitsubishi L2E 2 cylinder diesel engine. The M-SC10 on
the L3E 3 cylinder. The engine is indirectly injected. The
engine is oil cooled and the oil is cooled by a heat
exchanger and raw water. The heat exchanger and all
other parts which are in direct contact with the raw (sea)
water are made of seawater resistant material like naval
brass and gunmetal.
The engine has been specially adapted for the
WhisperPower application and is very different from the
standard engine supplied for industrial applications!
2.5.3 Digital Diesel Control system
The standard electrical engine control system is 12 Volt
negative earth, non-earth return (ungrounded) is available
as optional. Check your identification data to determine
which system is applied. The system is designed
according to the "energise to run" system. The Digital
Diesel Control is a very advanced microprocessor based
full automatic system. Besides automatic start the system
offers many monitoring options. Refer to the separate
Digital Diesel Control user manual.
The microprocessor unit is located on top of the alternator.
1 26 5
347
Fig. 10: Digital Diesel Remote Control panel

INFORMATION
14 December 2010 / M-SC6/8/10 / EN
2.5.4 Battery charger
On the engine is an alternator generating 40 Amp 12V.
This current is rectified to charge the battery. The voltage
is regulated at ±14.4V.
2.5.5 Alarms and shut down
In the event of malfunctioning this will be indicated by the
failure light and details will be shown on the display the
engine will be shut down. There are three functions
guarded: oil pressure, oil temperature and exhaust
temperature.
Exhaust temperature too high indicates the cooling water
to be blocked.
All alarm switches are closed when no malfunction occur.
A contact is cut in the event of an alarm. This means that
the generating set will not work when the alarm switches
are broken or there is a loose wire. The system therefore
is intrinsically safe. The panel will display details about the
alarm.
2.5.6 Control
The generating set can be operated by push buttons on
the panel on the alternator or by the remote control. By
pushing the START button the control system is activated
and will start the engine automatically. Pushing the STOP
button will stop the engine and the electrical system will be
deactivated.
2.5.7 Remote control
All wiring connections from the remote control to the board
are made by plug in connectors.
An intermediate communication cable is in the standard
supply. If necessary an optional longer 8 wire cable can be
connected if the standard length does not suit the required
distance. Numerous remote control units can be put in
parallel by using the connectors on the back of the units.
(Refer to installation instructions)
2.5.8 Hour counter
The remote control offers several timer functions that help
to schedule maintenance.
2.5.9 Load indicator
On the remote control the load will be indicated on the
display and by the LED-bar. The load is measured by a
current transformer on the alternator.
2.5.10 Fuel specification
The engine must only be used with diesel fuel oil which
conforms to the standards for use in modern diesel
engines. Fuel free from water and contaminants is of the
utmost importance.
2.5.11 Oil information
1 Specification:
The oil must be suitable for oil changes as specified in
the maintenance chapter. The engine must be run on
heavy duty lubricating oil meeting the requirements of
API class CD, CF or CF_4.
It is very important to use the correct oil
specification. Very often local oil suppliers
recommend a higher class, because they
assume that a higher class is allowed. This is
not the case. One should not follow these
recommendations.
Using the wrong specification will cause high
oil consumption.
2 Oil viscosity:
We recommend a multigrade oil 15W40.
3 Oil capacity:
Excluding the oil filter the content of the crankcase of
the M-SC6/8 is 2.4 l; M-SC10: 3,6 l. Including the oil
filter it is 2.9 l; M-SC10: 4,1 l. Note that the engine
may contain some residual oil due to testing at the
factory.
While filling, check the lubricating oil level by means
of the engine oil dipstick. Do not overfill with
lubricating oil as this may have a detrimental effect on
engine performance.
4 Oil pressure
•Minimum at idle 49 Kpa (0,5 kgf/cm2 - 7psi).
•Normal at 3000 rpm between 147 and 490 Kpa
(1,5 up to 5 kgf/cm2 - 21 up to 71 psi).
•Minimum at 3000 rpm 98 Kpa (1,0 kgf/cm 2 - 14
psi).
2.5.12 Cooling liquid
The engine is cooled by cooling liquid. The capacity of this
system of the M-SC6-8 is 2 litres and of the M-SC10 3,5
litres.
Always use coolant which is compatible with
aluminum components of the cooling system.
Do not mix coolants with different kinds of
chemical compound, as this may cause
congelation of the coolant. In case of doubt
refresh the content of the entire cooling
system.
We recommend not using water but cooling liquid that is
marketed for the use in combustion engines. Cooling liquid
protects the engine against frost to minus 25° C. Also it
protects the engine block against corrosion. One can fill
the engine via the filling cap on the exhaust manifold. Fill
up till the level is just below the filling cap. When the
engine is on temperature the liquid will expand and the

INFORMATION
EN / M-SC6/8/10 / December 2010 15
redundant liquid will be pressed into the expansion tank.
This tank has to be filled up till the mark. When cooling
liquid is not available clean fresh water could be used with
an additive of anti-freeze. When using water with anti-
freeze the right mixture has to be calculated according to
the information of the supplier of the anti-freeze. When the
cooling is based on keel cooling or radiator cooling the
capacity of these coolers and piping has to be taken into
account calculating the right mixture. The cooling liquid in
the engine is pressurised and has a boiling point above
100° C. The temperature switch in the thermostat housing
switches at 110° C. When keel cooling or radiator cooling
is applied the cooling system is not pressurised. There
should be a special cap on the manifold without valves
leaving the connection to the expansion tank open. Refer
to the manual on keel cooling and radiator cooling.
2.5.13 Technical data
Model M-SC6 M-SC8 M-SC10
GENERAL
RPM 3000 3000 3000
Alternator water cooled, synchronous
Engine: Mitsubishi diesel, model L2E L2E L3E
Number of cylinders 2 2 3
Displacement 635 cm3 635 cm3 952 cm3
Bore X stroke 76x70 mm 76x70 mm 76x70 mm
Combustion air consumption 0.9 m3/min 0.9 m3/min 1,4 m3/min
Continuous power engine 5 kW 6,4 kW 10,5 kW
Cooling system indirect cooling by raw water, 10-15 l/min.
Cooling water pump PTO driven WhisperPower self priming impeller pump, type M
Fuel lift pump engine electric pump (12 V DC), additional pump available upon request
Starting battery (optional) 60-90 Ah 12V
Fuel consumption 1.5-4 litre/hour, load dependent
Control Digital Diesel Control including automatic start/stop
ELECTRICAL SPECIFICATIONS
Output voltage 230V 50 Hz alternating current (AC) single phase
Output rating at powerfactor cos phi = 1 5 kW 6,4 kW 9.4 kW
Voltage tolerance ± 5% ± 5% ± 5%
Frequency tolerance ± 5% ± 1% * ± 1% *
Alternator brushless, two pole, synchronous
Voltage regulation: capacitor capacitor + AVR (option) capacitor + AVR (option)
MECHANICAL SPECIFICATIONS
Supply includes generating set, built into tugged GRP sound shield with steel base plate, mounted
on rubber anti vibration mounts
Dimensions hxwxd 660x495x550 mm 660x495x550 mm 810x525x615 mm
Colour top white, bottom green
Weight (including canopy) 178 kg 182 kg; 210 kg
Max. installation angle 25 degrees 25 degrees 25 degrees
Standard supplies remote panel (+15 m cable), fuel lift pump, expansion tank
Optional mobile Installation kits, mobile (vehicle) version, non-earth return, spare part kits
* Electronic governor

INFORMATION
16 December 2010 / M-SC6/8/10 / EN
2.5.14 Wiring codes and colours
number colour cable code no
cross section
battery > starter motor red 25 mm2
starter motor > DDC 1 red 6 mm2
starter motor > LCP 13 red 2,5 mm2
battery > ground black 25 mm2
ground > LCP ground (GND) 2 black 2,5 mm2
DDC > glow plug 3 brown 4 mm2
DDC > starter solenoid 4 yellow 2,5 mm2
LCP > fuel lift pump + 5 brown 1,5 mm2
LCP > fuel lift pump – 15 black 1,5 mm2
DDC > LCD 5 grey 1,5 mm2
DDC > oil pressure switch 6 purple 1 mm2
LCP > oil pressure switch 6 purple/black 1 mm2
DDC > oil temperature switch 7 blue 1 mm2
LCP > oil temperature switch 7 blue/black 1 mm2
DDC > exhaust temperature switch 8 blue/green 1 mm2
LCP > exhaust temperature switch 8 blue/rose 1 mm2
DDC > fuel solenoid (hold) 9 green 1,5 mm2
DDC > fuel solenoid (pull) 20 pink 1,5 mm2
DDC > fuel solenoid (com.) 17 black 1,5 mm2
B+ terminal alternator > starter motor 21 red 6 mm2
DDC >R terminal alternator 18 white 1,5 mm2
DDC > L terminal alternator 19 orange 1,5 mm2
DDC > current measuring transformer 11 black 1 mm2
DDC > current measuring transformer 11 red 1 mm2
DDC > LCP 12 black 1,5 mm2
DDC > LCP 14 red 1,5 mm2
DDC > LCP 16 red/green 1,5 mm2
DDC > generator AC output 33 brown 1 mm2
DDC > generator AC output 33 blue 1 mm2
DDC=Digital Diesel Control Unit
LCP=Local Control Panel

INFORMATION
EN / M-SC6/8/10 / December 2010 17
2.5.15 Lay out control wiring
Fig. 11: Lay out control wiring

INFORMATION
18 December 2010 / M-SC6/8/10 / EN
2.5.16 Electrical diagram 230 V AC / 50 Hz
Fig 12: Electrical diagram 230V
EARTH AND NEUTRAL CONNECTED
EARTH AND NEUTRAL NOT CONNECTED
L1
PE
N
DDC/AC-1
230V / 50Hz
ROTOR
EXCITATION
WINDING
MAIN WINDING
MAIN WINDING
STATOR
CAPACITOR
DDC/ct-1
YELLOW/GREEN
BLACK (4)
RED (3)
BLACK (4)
RED (3)
GREEN (1)
GREEN (2)
RED (11) BLACK (11)
BROWN
YELLOW/GREEN
BLUE
BLUE (33)
BROWN (33)

INFORMATION
EN / M-SC6/8/10 / December 2010 19
2.6 DIAGRAM ELECTRONIC GOVERNOR
The M-SC8 and 10 3000 rpm are equipped with an
electronic governor in addition to the mechanical governor
that is on other Whisper models. A governor keeps the
speed (RPM=Rotations Per Minute) of the engine at a
fixed value. The RPM of the engine correlates with the
frequency of the electrical output (3000 RPM =50 Hz) of
the alternator.
Under full load the RPM of the Whisper models that has
only a mechanical governor can drop 75 RPM (=2.5 Hz) at
full load and will go further down or collapse when further
loaded. However the engines with the electronic governor
will keep the RPM and frequency at the set value. As the
voltage is related to the frequency, the voltage will be
more stable as well.
The RPM represents power and the alternator performs
better as well on a higher speed. Whisper models with an
electronic governor will bring more power.
So the electronic governor offers three advantages: a
more stable frequency and voltage and more power.
The electronic governor system contains two parts:
1 The actuator controls the engine speed. This actuator
replaces the standard hold solenoid that is on all other
mechanical controlled Whisper engines. The actuator
controls the RPM directly on the fuel rack inside the
fuel pump without levers and other mechanical
transmissions.
2 A microprocessor keeps the speed at the set value by
controlling the actuator. The microprocessor is
programmed at the WhisperPower factory and many
parameters are set to perform well. It should not be
necessary to make adjustments. When adjustments
are necessary this can only be done with the help of
an interface to a computer and special software to get
access to the microprocessor.
The WhisperPower electronic governor does not need a
pickup device in the flywheel housing that counts the
passing tooth of the flywheel and determines the exact
RPM of the engine, because the processor uses the 50 Hz
of the AC output voltage as a reference.
Fig 13: Diagram electronic governor

OPERATION
20 December 2010 / M-SC6/8/10 / EN
3 OPERATION
3.1 GENERAL
The generating set is operational after full installation and
filling up with: fuel, engine lubricating oil and cooling liquid,
filling the starter battery with acid, connecting the battery
to earth and connecting the digital remote control panel.
Fig. 14:
3.2 OPERATING INSTRUCTIONS
3.2.1 Summarised operating instructions (daily
use)
Routine "pre-start" checks:
1 Check oil level (refer to fig. 14).
2 Engine cooling system (all valves open).
3 Power source selector switch (off/shore
power/generator power). Switch to power source
switch "OFF", or switch off all consumers in the usual
way.
4 Switch on battery switch (when installed).
5 Fuel valve: open.
Starting:
Push the start button to initiate the full automatic
starting procedure. You can monitor the procedure on
the display.
In operation checks:
1 Check for abnormal noise or vibration
2 Check the voltage
3 Check sea water flow at exhaust outlet
4 Power source selector switch (off/shore
power/generator power). Switch to power source
generator. If a Masterswitch is installed, this operates
automatically.
5 Before loading the generating set up to maximum,
have it run warm. Continuous load should be
restricted to 70 % of maximum load.
Stopping generator:
1 Switch off all electrical devices (consumers). If the
generating set has been running under full load for a
longer period, do not shut it down abruptly. Reduce
the electrical load to about 30% of the rated load and
let it run for approx. 5 minutes.
2 Press the STOP button.
3 Close the inlet sea water cock.
4 Switch to another AC power source, if available.
1
2
1 Maximum oil level
2 Minimum oil level