MW Fly Spirit 100 Direct L User manual

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LINE MAINTENANCE Manual
SPIRIT engines

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Before starting any maintenance work, carefully read the
regular maintenance manual and the overhaul maintenance
manual: these documents contain important information for
carrying out checks and repairs in compliance and in safety.
The information contained in them must be evaluated and
integrated by technicians with adequate experience and with
specific training on the engine.
The interventions must be carried out with professional
equipment, supplemented by tools specifically designed to
work on the engine components.
All information, illustrations, instructions and technical data contained in this
manual are current at the time of printing. MWfly reserves the right to make
changes at any time, without notice and without incurring any obligation.
Reproduction of any part of this publication is prohibited without the written
authorization of MWfly.
This manual is an integral part of the propeller, and must be kept with it,
even if it is sold.
The original document is written in Italian, which is valid for any dispute of a
technical or legal nature.

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INDEX
01-00-00 INTRODUCTION 7
01-01-00 Identification Data 8
01-01-01 Standard or Non-standard Motor Definition 8
01-02-00 Documentation 9
01-02-01 Notes for Consultation 9
01-02-02 Unit of Measure 11
01-02-03 Technical Documentation Available 13
01-03-00 Safety 14
01-04-00 Maintenance Criteria 16
01-04-01 Line Maintenance 17
01-04-02 Heavy Maintenance 17
01-05-00 Maintenance Equipment 17
01-05-01 Workshop Tools 17
01-05-02 Special Tools 18
01-05-03 Consumables 18
01-06-00 Prolonged Inactivity 19
01-06-01 Preservation 20
01-06-02 Resumption of Service 21
01-07-00 Motor Shipping Precautions 22
01-08-00 MWfly Authorized Service Centres 23
04-00-00 AIRWORTHINESS LIMITATIONS 24
05-00-00 PERIODIC MAINTENANCE 25
05-01-00 Authorized personnel 25
05-02-00 Preparing the aircraft for maintenance 26
05-03-00 Safety locks and seals 27
05-04-00 Troubleshooting 27
05-10-00 Operational limits 27
05-10-01 Hourly operating limit 28
05-10-02 Calendar operating limit 29
05-10-03 Operational limit of lubricants 29
05-10-04 Operating limit of the refrigerant 29
05-10-05 Operating limit of plastic parts 29
05-10-06 Operating limit of other components 30
05-20-00 Periodic maintenance program 30
05-20-01 General rules for maintenance 31
05-20-02 Engine logbook 32

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05-20-03 Scheduled maintenance table 32
12-00-00 INSTRUCTIONS FOR MAINTENANCE 37
12-01-00 Tightening torques 37
12-02-00 Locking the crankshaft 40
12-02-01 Motors without gearbox 40
12-02-02 Motors with gearbox 41
12-02-03 Locking for timing without removing the reducer or front cover 42
12-03-00 Engine test after maintenance or periodic inspection 43
12-04-00 Removal and reassembly of the engine from the aircraft 45
12-04-01 Removal 46
12-04-02 Installation 47
12-10-00 Supplies 48
12-10-01 Cooling liquid 49
12-10-02 Motor oil 50
12-10-03 Gearbox oil 51
12-20-00 Scheduled maintenance 53
12-21-00 Engine cleaning 53
12-22-00 General checks 54
12-22-01 Check for leaks 54
12-22-02 Check crankcase breather 57
12-22-03 Engine suspension check 58
12-22-04 Cylinder compression control 59
12-22-05 Check the tension of the distribution chain 61
12-22-06 Check general smoothness 62
12-22-07 Endoscopic inspection 65
12-22-08 Annual inspection 69
12-23-00 Cooling system 70
12-23-01 Control and cleaning 70
12-23-02 Emptying 71
12-23-03 Check expansion tank 72
12-23-04 Thermostatic valve and pump manifolds 74
12-23-05 Radiator 77
12-23-06 System filling and venting 78
12-24-00 Engine lubrication system 79
12-24-01 Oil change 79
12-24-02 Oil filter replacement 81
12-24-03 Oil sump cleaning 82
12-24-04 Check for the presence of particulate matter 84

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12-24-05 Spectrographic analysis of engine oil 87
12-25-00 Fuel system 87
12-25-01 Check 87
12-25-02 System depressurization 88
12-25-03 FD-m 88
12-25-04 Fuel shunt and pressure regulator 92
12-26-00 Air intake system 95
12-26-01 Removal 95
12-26-02 Reassembly 96
12-26-03 Air filter replacement 97
12-27-00 Exhaust system 98
12-27-01 Removal 98
12-27-02 Control and recovery 99
12-27-03 Installation 100
12-28-00 Electrical components 100
12-28-01 Wiring check 100
12-28-02 Spark plugs 101
12-28-03 Ignition coils and cables 104
12-28-04 Battery and charging system 107
12-28-05 IJ-m 110
12-28-06 AG-m 113
12-29-00 Transmission 114
12-29-01 Direct engine tightenings 114
12-29-02 PSRU engine tightenings 115
12-29-03 Oil change 118
12-29-04 Check magnetic filter 120
12-29-05 Spectrographic analysis of oil 120
12-29-06 Vent control 121
12-29-07 Gear gap control 121
12-29-08 Damper torque control 122
12-30-00 Unscheduled maintenance 124
12-31-00 Warnings and checks for use in extreme climatic conditions 124
12-32-00 Checks after use outside the operating limits 125
12-32-01 Operation with coolant temperature too high 125
12-32-02 Use with too low coolant temperature 126
12-32-03 Use with too high engine oil temperature 126
12-32-04 Use with too low engine oil temperature 127
12-32-05 Operation with gear oil temperature too high 128

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12-32-06 Operation with too low engine oil pressure 128
12-32-07 Use with control units and current regulator temperatures too high 129
12-32-08 Exceeding the maximum number of revolutions 129
12-33-00 Checks after use with unfulfilled prescriptions 130
12-33-01 Ignition spark plug specifications not respected 130
12-33-02 Coolant specifications not respected 131
12-33-03 Engine oil specifications not respected 131
12-33-04 Gearbox oil specifications not respected 132
12-33-05 Fuel specifications not respected 133
12-33-06 Moment of inertia and loads on the propeller shaft higher than allowed 134
12-34-00 Checks for anomalies 134
12-34-01 Accidental impact of the propeller against the ground 134
12-34-02 Excessive vibrations 135
12-34-03 Difficult starting 136
12-34-04 Irregular running at idle 136
12-34-05 Reduction of maximum power (maximum revolutions with fixed pitch propeller) 136
12-34-06 Excessive or abnormal noise 137
12-34-07 Unwanted stopping of the thruster 137
12-34-08 Excessive consumption of engine oil 137
12-34-09 Excessive consumption of gear oil 137
12-34-10 Excessive accumulation of particulates on the magnetic filters 137
12-34-11 Excessive consumption of coolant 137
12-34-12 Presence of water in the engine oil 138
12-35-00 Communication of operating anomalies 138
LIST OF REVISIONS TO THE DOCUMENT 140

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01-00-00 INTRODUCTION
The SPIRIT series of engines are designed and manufactured using the most modern
motor technology with the purpose of achieving good performance combined with a
high level of passive safety. If the engine is used correctly it will return years of
pleasure and reliable service.
Please read this manual carefully before using the engine and apply all safety
standards contained in it, in addition to those that your experience and common sense
suggest.
Remember that regular maintenance and a thorough inspection before take-off are
essential safety factors.
MWfly will be happy to provide additional information and all the technical support you
will need.
This manual collects the essential information to be able to carry out maintenance
work on SPIRIT engines. The operating, installation, extraordinary maintenance
manual and anything else published by MWfly, completes the information contained in
this manual, which must be taken into account to carry out maintenance work. The
technician who performs maintenance is also required to have specific theoretical and
experimental training on the type of engine.
All of this forms the basis for carrying out maintenance safely and without
compromising the reliability of the engine.
Scrupulously follow all the instructions provided in this manual and request further
information or clarification if deemed necessary for carrying out the maintenance
operations in safety.
This engine has not received any certification for suitability
for aeronautical use.
Its use is intended exclusively for experimental or non-
certified aircraft, on which a possible engine failure does not
compromise flight safety.
For engine maintenance, follow any rules and laws in force in the
country where the engine is used.

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01-01-00 Identification Data
The engine serial number is stamped
on the top of the engine, near the
gearbox. It consists of the model
identification code (72-02-C) followed
by a six-digit number, of which the
first four indicate the serial number
and the last two indicate the year of
manufacture.
01-01-P
Removing or modifying the serial number will revoke any warranty and obligation by
MWfly toward current owner.
Provide the serial number on any request for an engine part or technical information.
01-01-01 Standard or Non-standard Motor Definition
In some maintenance operations described in this manual, reference is made to
standard motor versions (abbreviated STD) or non-standard motors (abbreviated
NOSTD).
This definition complies with the SAE J824-199506 standard according to which an
engine is standard if, when viewed from the power take-off side, it rotates counter
clockwise.
For greater clarity, the following table shows the type of motor (STD or NOSTD) for
each motor model of the Spirit series: the product code is present on the identification
plate of each motor.

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Name
Product
code
Engine
type
Spirit 100 Direct L
W011
STD
Spirit 100 Direct R
W012
NOSTD
Spirit 115 Direct L
W013
STD
Spirit 115 Direct R
W014
NOSTD
Spirit 135 Direct L
W017
STD
Spirit 135 Direct R
W018
NOSTD
Spirit 160 Direct L
W023
STD
Spirit 160 Direct R
W024
NOSTD
Spirit 122 PSRU L
W015
NOSTD
Spirit 122 PSRU R
W016
STD
Spirit 135 PSRU L
W019
NOSTD
Spirit 135 PSRU R
W020
STD
Spirit 140 PSRU L
W021
NOSTD
Spirit 140 PSRU R
W022
STD
Spirit 160 PSRU L
W025
NOSTD
Spirit 160 PSRU R
W026
STD
01-01-C
01-02-00 Documentation
01-02-01 Notes for Consultation
This manual was originally printed in Italian. This will be the only language used for
any reference or dispute.
The manual is divided into chapters; each chapter is divided into sections; each
section is divided into paragraphs; within each paragraph there may be a further
subdivision into topics. The title of each chapter, section, paragraph or topic is
highlighted as follows.
CHAPTER
Section
Paragraph
Topic

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The numbering system of the contents of the manual consists of a numerical code
using the following criterion.
The content of each document is numbered and divided as follows.
CC-SS-PP
where:
CC indicates the chapter of the document
SS indicates the section of the document
PP indicates the paragraph of the document
The subdivision into CC (chapters) will follow the ATA-100 scheme. The subdivision of
the first digit of each section will also respect the ATA 100 scheme; the second digit of
each section is assigned by MWfly, to correctly subdivide the topic.
Within each section, the numbering in paragraphs will follow a progressive numbering,
starting from number 01.
The identification of the figures and tables shows the chapter number and a
progressive number, followed by the letter P for the figures and the letter C for the
tables (e.g. 21-03-P).
The triad of reference axes
used in the manual is a right
triad that originates on the
helix axis, at the
intersection with the helix
support plane: the x axis
originates on the support
plane of the flange itself and
is positive in the direction of
the engine, the y axis is
positioned with origin on the
centre line of the engine and
is positive in the direction of
the cylinder bank # 1, the z
axis originates on the
propeller shaft and is
positive upwards, on the
intake manifold side.
Symbols used in this manual have the following meaning.
WARNING: Not following this instruction can cause severe
personal injury or loss of life.
CAUTION: Not following this instruction could cause severe damage
to the engine or other components and cause the engine to stop.
01-02-P

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NOTE: Refers to supplementary information to completely or fully
understand the instruction.
1., 2., ... This numbering is used to list tools and consumables needed to run an
installation or maintenance; it is also used to bring in parts lists or engine
parts shown in the illustrations.
a., b., … This lettering is used to indicate a list of actions or subjects with relation
to inclusion: all of the actions or options listed must be verified.
oThis symbol is used to indicate a list of actions or subjects with relation to
exclusion: only one of the actions or options listed with this symbol must
be verified.
This symbol is used to list the general characteristics of the engine,
component specifications or options for installation or maintenance.
(…) A text enclosed in brackets clarifies an aspect, or constitutes an example
or a reference to a chapter of the same or another document (e.g.
DMB.E10.2.3).
01-02-02 Unit of Measure
All the units of measurement reported in this and other MWfly manuals are expressed
in technical units (ST), judged to be more usable and understandable than the units of
the International System (SI). Table 01-01-C shows the conversion factors between
the technical units used in compiling the manuals, the equivalent units of the
International System and the equivalent units of the Imperial System. To obtain from
the quantities expressed in technical units the corresponding value in For S.I. or
Imperial simply multiply by the coefficient shown in the tables. As an example, we
report some conversions.
100CV = 100*0,735kW = 73,5 kW
100CV = 100*0,986Hp = 98,6 Hp
82 Kgf = 82*9,81 N = 804,42 N
82 Kgf = 82*2,205 lb = 180,8 lb
If in doubt about the meaning of the measurements, their value or interpretation,
contact an authorized MWfly service centre. If measurements made on the engine or
relating to it refer, these must be expressed in units consistent with the Technical
System used in the manuals, which is the only one adopted by MWfly.

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CONVERSION FACTORS BETWEEN MEASUREMENT SYSTEMS
Type of
measurement
ST Unit
S.I. Unit
Anglo-Saxon unit
Length
cm
mm
m = 100cm =
1000mm
ft = 30,48cm = 304,8mm
in = 2,54cm = 25,4mm
Surface
cm2
mm2
m2= 104cm2 =
106mm2
sq ft = 77,42cm2 =
7741,9mm2
sq in = 6,45cm2 =
645,16mm2
Volume
cm3
mm3
m3= 106cm3=
109mm3
cu in = 16,3871cm3
cu ft = 28316cm3
Capacity
L
m3= 103L
gal (UK) = 4,5461L
gal (US) = 3,7854L
Mass
Kg
g
Kg = 103g
lb = 0,453Kg = 453g
Weight
Kgf
gf
N = 9,81Kg = 9814g
lb f= 2,205Kgf= 2205gf
Density
g/cm3
Kg/m3= 10-3g/cm3
lb/ft3 = 62.43g/cm3
Flow Rate
m3/h
m3/min
m3/s
m3/s =
1/3600*m3/h
m3/s =
1/60*m3/min
cu ft/s = 0,0284 m3/s
Force
N
N
lbf = 4,448N
Pressure
bar
mbar
Pa = 10-5bar = 10-
2mbar
psi = 0,0689bar =
68,9mbar
in Hg = 0,0338bar =
33,8mbar
Torque
Kgm
Nm = 9,81Kgm
ft lb = 0,138Kgm
Power
CV
kW = 0,735CV
Hp = 0,986CV
Fuel
Consumption
g/CVh
g/kWh = 1,359g/CVh
lb/Hph = 447,59g/CVh
Time
s
min
h
s = 1/60m in =
1/3600h
s
Velocity
m/s
Km/h
m/s = 1/3,6Km/h
kn = 1,852Km/h =
0,514m/s
Temperature
°C
K = °C-273,15
°F = (1,8*[°C])+32
01-02-C
Table 01-03-C shows the conversion between the section of the electrical cables,
expressed in square millimetres, and the corresponding AWG measurement, most
commonly used by installers.

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ELECTRICAL CABLES SECTION CONVERSION
mm
2
21,200
13,300
8,350
5,270
3,310
2,080
1,310
0,820
0,519
AWG
4
6
8
10
12
14
16
18
20
01-03-C
01-02-03 Technical Documentation Available
The technical documentation and directives are to be considered a necessary tool for
personal training, but they cannot in any way replace adequate specific instruction,
both theoretical and operational
The information provided in the following manuals contains procedures and checks
that can be carried out by qualified professionals operating in the sector.
DMA.E10 - Installation manual: contains the information necessary for the proper
installation of the engine.
DMB.E10 - Operating manual: contains the information necessary for the proper
use of the engine.
DMC.E10 - Ordinary maintenance manual: contains the information necessary for
the compliant execution of scheduled maintenance.
DMD.E10 - Extraordinary maintenance manual: contains the information
necessary for the execution compliant with unscheduled maintenance, i.e.
determined by failures.
DME.E10 - illustrated spare parts catalogue: contains the list of spare parts and
accessories expected.
DSL.E10 - service letter: contains information aimed at improving the product or
use of the same.
DSB.E10 - Service bulletin: reports the substitutions, checks or warnings to be
applied within the indicated deadline.
The variety of installations can make the information contained in
the aforementioned manuals inapplicable, inadequate or
insufficient.
The illustrations in this manual do not represent in detail the details
of the engine, but provide an indication of their function and
structure: for these reasons it is not possible to deduce
dimensional information or verify details from the published
illustrations.
All further necessary documentation is however available at the MWfly authorized
service centres.

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01-03-00 Safety
This manual is a guide for the correct maintenance of SPIRIT engines.
In addition to reading all the publications relating to the engine in use, to operate
correctly and safely it is necessary to have good mechanical experience and have an
in-depth knowledge of the problems connected to workshop operations. Specific
preparation on the type of engine is also required.
For your safety, here are some important tips, suggested by common sense and by
the usual norms of prudence, without however being able include all of the situations
or behaviours that constitute opportunities for potential risk.
Installation or any kind of adaptation not performed in
accordance with the technical requirements of the manuals
or by staff not authorized to operate on the product itself
are a source of grave danger and releases MWfly from any
obligation and responsibility to the user.
All maintenance work must be carried out in a suitable
place, with the engine cold and off, avoiding the dispersion
of liquids or polluting substances.
The prescribed tightening torques must be scrupulously
observed to avoid the risk of detachment of components
during use of the engine: non-compliance will void any form
of guarantee and automatically release MWfly from any
liability.
All safety sealing elements, such as self-locking nuts or
washers must be installed according to the prescriptions
and replaced at each disassembly: this serves to guarantee
the function of safety elements.
Never carry out test engine start-ups before having totally
completed the maintenance work, and having made sure
that you have reassembled the propeller in all its parts.
Carry out an adequate inspection before starting the engine
for the first time: this helps to prevent accidents or damage.
In case of doubt about installation first contact an
authorized service centre.

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Only authorized and technicians trained on the product are
qualified to work on the engine. Failure to comply with this rule
voids any type of product warranty and releases MWfly from any
further obligation and liability towards the user.
This engine has received no airworthiness certification, nor is it
subject to any aeronautical standards. Its use is intended for
experimental aircraft or certificates, on which a possible engine
failure does not affect the flight safety. You assume all risks arising
from the use of the engine and recognize and are aware of the
foregoing.
Do not start the thruster without the propeller: this can cause
serious damage to the thruster.
To work properly and safely on the engine, adequate workshop
equipment is required, including specific tools designed to work on
engine components.
It is good practice to avoid interrupting any operation on the
engine before completion: one of the main causes of failure is
represented by oversights or omissions committed during
maintenance.
As spare parts it is necessary to use only original MWfly
components: the use of non-original components and not expressly
approved in writing by MWfly automatically invalidates any form of
product warranty and releases MWfly from any liability.
Always keep the engine in perfect working order by following the
maintenance table contained in this manual and performing the
coupons at the envisaged intervals.
Replace the sealing elements (gaskets), the fixing elements
(screws, bolts) and all the details which, upon disassembly, show
damage or reduced functionality, even if not explicitly prescribed in
the manual.
The description and illustration of components or parts of the
engine refer to the configuration at the time of publication of the
manuals. The sole purpose of the illustrations is to allow the
identification of the parts and to assist in the manual operations:
they are not to be interpreted as technical drawings or as
representations of reality.

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When there are differences between what is specified in this manual and local
regulations, you must proceed under the more stringent rule.
In case of doubts or difficulty in interpreting what is written, it is necessary to ask for
clarification from an authorized MWfly assistance center before proceeding.
It is the responsibility of the user and the installer to observe all the safety
recommendations contained in the manuals, applying them in compliance with the
regulations in force regarding safety in the workplace. These recommendations
constitute important warnings and instructions on how to operate the engine in safety,
making its use compliant with the requirements: non-observance can cause
malfunctions, damage to people or things and sometimes death.
The recommendations and instructions given in the manuals are not exhaustive, nor
do they eliminate other safety standards that current legislation, common sense and
experience impose: the user and the installer must inform themselves by any possible
means regarding the method of operate in safety, for themselves and for others, with
regard to the methods of carrying out ordinary and extraordinary maintenance work,
as well as pre-flight checks.
Reading the manuals alone does not eliminate the risks connected to the use of the
engine for the project purposes, nor the damages that a possible malfunction can
cause to people or things: the user, with the use of the engine, accepts the resulting
risks.
01-04-00 Maintenance Criteria
Information regarding maintenance can be collected in two categories: regular
maintenance and overhaul maintenance. This subdivision is respected in the drafting
of the two respective maintenance manuals.
All maintenance work must be carried out in accordance with what is specified in the
maintenance manuals.
Any interventions carried out with criteria other than those
described in the maintenance manuals can be very
dangerous for safety and harmful for the integrity of the
engine, and must be absolutely avoided.
Non-compliant maintenance operations involve the
revocation of the guarantee on the engine and its
components and release MWfly from any obligation or
liability.
At the end of the maintenance operations, both ordinary and
extraordinary, it is necessary to carry out the engine test on the
ground.

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01-04-01 Line Maintenance
The purpose of line maintenance is to perform checks and adjustments, install engine
components, or perform consumable changes (e.g. lubricant) that do not necessarily
involve removing the engine from the aircraft.
In some cases, line maintenance operations must be completed
with heavy maintenance operations, for which it is necessary to
consult the appropriate manual.
The line maintenance operations are described in detail in this “line maintenance
manual”(DMC.E10), together with the equipment and consumables necessary for its
execution.
01-04-02 Heavy Maintenance
The purpose of heavy maintenance is to carry out operations for the removal, control
or replacement of engine components not contemplated in line maintenance since
they are caused by breakdowns or malfunctions; heavy maintenance operations often
require a prolonged stop or the removal of the engine from the aircraft.
In some cases, heavy maintenance operations must be completed
with line maintenance interventions, for which it is necessary to
consult the appropriate manual.
The heavy maintenance operations are described in detail in the “heavy maintenance
manual”(DMD.E10), together with the equipment and consumables necessary for its
execution.
01-05-00 Maintenance Equipment
The workshop tools and tools specifically designed to perform routine maintenance on
the engine are listed below. The same equipment is listed and numbered at the
beginning of each paragraph describing maintenance operations: the number will be
recalled in square brackets to indicate the use of the associated equipment, in the
specific maintenance action; in the case of combined use of several tools, they will be
recalled separated by the semicolon sign; in the case of combined use of torque
wrench and insert, they will be recalled separated by the + sign.
01-05-01 Workshop Tools
Torque wrench from 50 and from 150 Nm
Blade screwdriver from 2 mm
4 mm Phillips screwdriver
6 mm blade screwdriver
7, 8, 10, 13, 16, 17, 19, 32, 36 mm fixed-polygonal wrench
10 mm hexagonal socket wrench
Allen key 3, 4, 5, 6, 8 mm

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3mm Allen key
3mm Allen key with ball head
8mm Allen key with ball head
Swivel wrench for 16 mm spark plugs
Needle nose pliers
Pliers for seeger assembly for holes with 1.5 mm pins
Scraper for floors
Hammer with plastic knockers
Air compressor
01-05-02 Special Tools
Reducer locking tool cod. X278
Oil filler cap tightening lever cod. X283
Chain tension control lever cod. X298
Propeller flange locking lever cod. X290
Engine lifting tool
cod. X299 for motors with gearbox
cod. X342 for motors without gearbox
Crankshaft locking screw cod. X300
Differential pressure gauge with compensation orifice with 1 mm diameter and 10
mm length
M10 spark plug adapter for differential pressure gauge
If the use of a torque wrench is prescribed in the description of
maintenance operations, all the tools listed must be supplemented
with the corresponding inserts required to perform torque
tightening.
01-05-03 Consumables
Use only the specified components and consumables, or technically equivalent
components and materials for carrying out maintenance work; the spare parts of the
engine must be original in order not to void the warranty and not to compromise
reliability and safety.

Line maintenance manual
SPIRIT engines
Document
DMC.E10.1
Edition
Revision
A
1
TRANSLATED
FREE DISCLOSURE
Page 19 of 140
When using chemical materials, it is necessary to comply
with the local legislation in force for disposal, as they are
special waste. When using, take the utmost care to protect
yourself and the environment from possible contamination.
Denatured alcohol for domestic use
Absorbent paper cloth
White petroleum
Fibre brush for diameters 50 ÷ 60 mm
Weak red threadlocker
Medium blue threadlocker
Strong green threadlocker
Strong blocker
High temperature gasket form
Copper-based high temperature grease
Anti-corrosion compound
Antioxidant for electrical contacts
Consumables are also listed and numbered at the beginning of each paragraph
describing maintenance operations and referred to during the description of the
maintenance phases.
01-06-00 Prolonged Inactivity
All external surfaces of the engine are protected against corrosion produced by
humidity in the air: the components made of aluminum are painted or anodized, the
steel components are galvanized or made of stainless steel. However, in case of long
periods of inactivity (more than 4 months), it is necessary to carry out engine
preservation, as described below. The resumption of service after a prolonged stop
must also take place after the prescriptions listed below.
Necessary Material
1. Torque wrench 50 Nm
2. Socket wrench for 16 mm spark plugs
3. 17 mm hex wrench
4. Kerosene or white petroleum (3 litres)
5. 2 x 5 later liquid container
6. Nylon hose clamps
7. Charger
8. Plastic bag D140
9. 2 x rubber plug D35-40
10. Scotch tape
11. 5 meters of 8 mm internal D fuel hose

Line maintenance manual
SPIRIT engines
Document
DMC.E10.1
Edition
Revision
A
1
TRANSLATED
FREE DISCLOSURE
Page 20 of 140
12. 2 x M12 banjo screw eyelet with D8 tube holder
13. Spray silicone-based anticorrosive
01-06-01 Preservation
a. Carry out a slow recharge [7] of the battery.
b. Connect approximately 2.5 meters of pipe [11] to each eyelet [12].
c. Remove [3] the fuel inlet pipe from the pump unit and screw one of the two
preparations to the prescribed torque [1 + 3], leaving the opposite end free.
d. Remove [3] the fuel return pipe to the tank from the fuel shunt and screw it to the
prescribed torque [1 + 3] one with the opposite end free.
e. Pour about a litre of kerosene [5] into a container [4].
f. Introduce the free end of the tube connected to the pump group into this
container.
g. Introduce the free end of the tube connected to the shunt into a second container.
h. Remove [2] both spark plugs from each cylinder. The spark plug cables must be
kept at a distance from the engine block and from each other using clamps [6].
i. Feed the auxiliary fuel pump until all the kerosene in the container is used up: in
this way the petrol residues will be completely removed from the fuel circuit and
from the pump unit.
j. Pour about two litres of kerosene [4] into the first container [5].
k. Move the pipe connected to the branch from the second to the first container [5].
l. Move the kill switches of both injection control units to the "on" position.
m. Power the auxiliary fuel pump and, at the same time, the starter motor for about
5 seconds: in this way the petrol residues will also be completely removed from
the injectors.
When operating the starter motor, avoid touching the spark
plug cables, keeping a safe distance from them: possible
electric shock.
During the activation of the starter motor, there must be no
electric arcs in the vicinity of the spark plug caps: otherwise it is
necessary to isolate them better.
n. Repeat the previous action three times, at intervals of about 10 seconds, each
time switching off and on the master relay.
o. Keep the auxiliary pump powered for about 1 additional minute.
p. Turn off the master relay.