Gucbir GJD7000H Datasheet

PREFACE
Thank you for purchasing products from our company. We appreciate your business.
The following manual is only a guide to assist you and is not a complete or compre-
hensivemanual of all aspects of maintaining and repairing your generator. The equi-
pment you have purchased is a complex piece of machinery. We recommend that you
consult with a dealerif you have doubts or concerns as to your experience or ability
to properly maintain or repair your equipment. You will save time and the inconveni-
ence of having to go back to the store if you choose to write or call us concerning m-
issing parts, service questions, operating advice, and/or assembly questions.
Our air-cooled diesel generators have some of the following features:
The air-cooled diesel generators are widely used when electrical power is scarce. Our
welders provide a portable mobile solution in supplying power for field operations
ction and metal welding when electrical power is not available.
This manual will explain how to operate and service your generator set.
If you have any questions or suggestions about this manual, please contact your local
dealer or us directly. Consumers should notice that this manual might differ slightly
from the actual product as more improvements are made to our products, Some of the
picturesin this manual may differ slightly from the actual product as well. We reserves
the right to make changes at any time without notice and without incurring any obligation.
GUCBIR GENERATOR
TYPE
MODEL ENGINE MODEL
STANDBY
kVA
PRIME
PHASE
NET WEIGHT DIMENSIONS
kVA kg mm
GJD7000H
GJD7000H-3
GJD7000S
GJD7000S-3
GJD8000H
GJD8000H-3
GJD8000S
GJD8000S-3
GJD10000H
GJD10000H-3
GJD10000S
GJD10000S-3
GJD16000S
GJD16000S-3
7
7
7
7
8
8
8
8
10
10
10
10
15
15
188FAE
188FAE
188FAE
188FAE
192FAE
192FAE
192FAE
192FAE
1100FAE
1100FAE
198FAE
198FAE
292FAE
292FAE
1
3
1
3
1
3
1
3
1
3
1
3
1
3
110
115
171
176
115
120
175
180
130
135
210
210
320
320
720x492x655
720x492x655
930x530x740
930x530x740
720x492x655
720x492x655
930x530x740
930x530x740
720x492x655
720x492x655
1100x760x860
1100x760x860
1300x700x955
1300x700x955
6
6
6
6
7
7
7
7
9
9
9
9
13,5
13,
Open Type
Open Type
Soundproof Canopy
Soundproof Canopy
Open Type
Open Type
Soundproof Canopy
Soundproof Canopy
Open Type
Open Type
Soundproof Canopy
Soundproof Canopy
Soundproof Canopy
Soundproof Canopy

Overall view of the generator
Chapter 1 Technical Specifications and Data
1-1 Technical specifications and data
1-2 Basic parameters 6
1-3 General overview of the generators
Chapter 2 Operating the Diesel Generator
2-1 General main points of safety during operation of the generator set
2-2 Preparation before operation
2-3 Checking the operation of the diesel engine
2-4 Starting the generator set
2-5 Procedures for starting the generator set
2-6 Proper oper~ion of the generator set
2-7 Loading
2-8 Stopping the generator
Chapter 3 Maintenance
3-1 Maintenance schedules
3-2 Storing for long periods of time
Chapter 4 Troubleshooting
4-1 Troubleshooting procedures
4-2 Questions and doubts
Chapter 5 Part Listings
TABLE OF CONTENTS
1
2
2
6
7
7
9
12
12
14
16
16
18
19
19
21
22
22
22
23

5
Overall view of the generator

6
CHAPTER 1.TECHNICAL SPECIFICATIONS AND DATA
1-1Technical specifications and data
MODEL
GENERATOR SETENGINEPACKAGE
FREQUENCY
VOLTAGE
POWER
MAXIMUM POWER
AMPERE
PHASE
VOLTAGE REGULATION
POWER FACTOR
ENGINE MODEL
PISTON & STROKE
MAX. POWER / SPEED
STARTING SYSTEM
OIL CAPACITY
FUEL CAPACITY
FUEL CONSUMPTION
WEIGHT
DIMENSIONS
20FT (SET)
40HQ(SET)
Hz.
v
KVA
KVA
A
mm
HP/rpm
gxkW/h
kg
mm
50
220
31
1
AVR
1
188FAE
88X75
12HP/3000
1,7
Electric Start Electric Start Electric Start Electric Start Electric Start
13,5
280
110
720x492x655
76
152
50
230/400
10
3
AVR
0,8
188FAE
88X75
12HP/3000
1,7
13,5
280
115
720x492x655
76
152
50
220
31
1
AVR
1
188FAE
88X75
12HP/3000
1,7
15
280
171
930x530x740
72
144
50
230/400
10
3
AVR
0,8
188FAE
88X75
12HP/3000
1,7
15
280
176
930x530x740
72
144
50
220
36
1
AVR
1
192FAE
92X75
13HP/3000
1,7
13,5
242
115
720x492x655
76
152
50
230/400
777788
666677
11
3
AVR
0,8
192FAE
92X75
13HP/3000
1,7
13,5
242
120
720x492x655
76
152
GJD7000H GJD7000H-3 GJD7000S GJD7000S-3 GJD8000H GJD8000H-3
Electric Start
MODEL
GENERATOR SETSENGINEPACKAGE
FREQUENCY
VOLTAGE
POWER
MAXIMUM POWER
AMPERE
PHASE
VOLTAGE REGULATION
POWER FACTOR
ENGINE MODEL
PISTON & STROKE
MAX. POWER / SPEED
STARTING SYSTEM
OIL CAPACITY
FUEL CAPACITY
FUEL CONSUMPTION
WEIGHT
DIMENSIONS
20FT (SET)
40HQ(SET)
Hz.
v
KVA
KVA
A
mm
HP/rpm
gxkW/h
kg
mm
50
220
45
1
AVR
1
198FAE
98x82
14HP/3000
2
13,5
230
130
720x492x655
54
108
50
230/400
14
3
AVR
0,8
198FAE
98x82
14HP/3000
2
13,5
230
135
720x492x655
54
108
50
220
45
1
AVR
1
198FAE
98x82
14HP/3000
2
30
230
210
1100x760x860
30
96
50
220
68
1
AVR
1
292FAE
2-92x75
19,5/3000
4
45
330
320
1300x700x955
24
54
50
230/400
14
3
AVR
0,8
198FAE
98x82
14HP/3000
2
30
230
210
1100x760x860
30
96
50
230/400
21
3
AVR
0,8
292FAE
2-92x75
19,5/3000
4
45
330
320
1300x700x955
24
54
50
220
36
1
AVR
1
192FAE
92X75
13HP/3000
1,7
15
242
175
930x530x740
72
144
50
230/400
10 10 10 13,5
10 13,5
8899915
915
7
7
11
3
AVR
0,8
192FAE
92X75
13HP/3000
1,7
15
242
180
930x530x740
72
144
S00061DJGS00001DJG3-H00001DJGH00001DJG 3-S00061DJG3-S00001DJGGJD8000S GJD8000S-3
Electric Start Electric Start Electric Start Electric Start Electric Start Electric Start Electric Start Electric Start

7
CHAPTER 2 OPERATING THE DIESEL GENERATOR
2-1 General main points of safety during operation of the generator set.
In order to operate the generator set safely，please follow all the instructions
provided in this manual carefully. Doing so otherwise may lead to accidents and or
equipment damage．
2-1.1 Fire prevention
The proper fuel for the diesel generator set is light diesel fuel．Do not use gasoline．
kerosene and or other fuels other than light diesel fuel．Keep a11 flammable fuels
away from the generator as the generator may spark and ignite these gases．In order
to prevent fires from occurring and to provide enough ventilation for people and the
machine，keep the diesel generator at least 1.5meters away from buildings or other
equipment．Always operate your diesel generator on a level site．If the generator
is operated on an incline，the lubricating system within the engine will not perform
well and may lead to failure of the engine．
2-1.2 Prevention from inhaling exhaust gases
Never inhale exhaust gases emitted by the engine．The exhaust gases contain toxic
carbon monoxide.Do not operate your generator in places with poor ventilation．In
order to operate this machinery indoors.
2-1.3 Prevention from accidental burns
system for the building is required to draw the Never touch the muffler and its cover
when the diesel engine is running．Do not touch the muffler and cover after the diesel
engine has been used，as the muffler remains hot for a good period of time．
2-1.4 Electric shock and short circuits
Never touch the generator if the generator is wet．And do not touch the generator if
your hand is wet．Do not operate generator if the weather conditions call for any
type of precipitation such as rain，snow or fogetc．To prevent electrical shocks，the
generator should be grounded．Use a lead to connect the grounding end of the
generator to the grounding surface of choice．Please refer to Fig.2-1 and Fig.2-2
before beginning to use the electric generator．

8
2-1.5 Other safety points
Before operating this generator，all operators should have a good knowledge of how
to break the circuit if any accidents occur．Also，all operators should be familiar
with all the swRches and functions of the generator before using this machine．While
operating the generator，wear safe shoes and suitable clothes during operation．
Always keep children and animals away from the generator．
2-1.6 Battery
The electrolytic liquid of the battery also known as battery acid contains sulfuric acid．
Inorder to protect your eyes，skin and clothing，wear protective gear when working
with the battery．If you come in contact with the electrolytic liquid，wash it
immediately with cleanwater．Also，if the electrolytic liquid comes in contact with
your eyes，see a doctor immediately．
Fig.2-1

9
2-2 Preparation before operation
2-2.1 Fuel choices and fuel treatment
Fuel tank
Use only light diesel fuel．The fuel should
be filtered clean．Never let dust and Water
mix with fuel in the fuel tank．Otherwise
it will clog the fuel lines and oil nozzles．
It may also damage your pressure pump．
Note：It is dangerous to overfill the fuel
tank．Never exceed the red piston in the
filter．
Air filter element
Do not wash the air filter．The
element is madeof dry material，
which does not permitwashing．
When the output of the diesel
engine is bad or the color of the
exhaust gas isabnormal，replace
the air filter element．Never
start the diesel engine without the
air filter．
Note：
Never smoke near the opening of
the fuel tank．Do not let sparks
get near the fuel or fuel tank and
do not overfill tank.After filling，
tighten the fuel cap．
GJD7000H
GJD7000H3
GJD8000H
GJD8000H3
GJD7000S
GJD7000S3
GJD8000S
GJD8000S3
GJD1000H
GJD1000H3
GJD10000S
GJD10000S3
GJD16000S
GJD16000S3
Volume
Type
The effective volume
offueltank
：(L)
14.5 30 4512.5
gearlever

2-2．2 Filling engine oil
Pouring inlet of lubricating oil
Put the generator set at level state，Fill the lubri-
cating oil to it till the inlet．At the same time．C-
heck the oil level with dipstick．It is neecessary
only toinsert the dipstick lightly．Caution：don’t
ratate the dipstick．
Classification of maintenance for diesel engine
The lubricating oil should be CC or CD grade．
Volume
Type
Volume(L)
England gallon
KDF2500X(E)
0.75
(0.16)
1.1
(0.24)
1.65
(0.36)
KDF2500X(E)
KDF6700X(E) KDF7500X(E)
KDF8500X(E) KDF6700Q
KDF7500Q KDF8500Q
Engine oil is the most important factor in determining the life of your generator engine．If you
use poor engine oil or if you don’t change the oil regularly,the piston and cylinder will wear ea-
sily or seize up．Also，the life of the other parts in your engine such as bearings，and other
rotating parts will shorten considerably．
Although there is an alarm system to check for low oil pressure，it is always a good idea to
check the amount of oil inside the engine．If the oil level is low，fill it before starting the
engine．A good time to drain the oil from the engine is when the diesel engine is still hot．If
the engine is fully cooled，it is more difficult to drain all the oil out or some impurities will
remain in the engine．
bolt to drain lubricating oil bolt to drain lubricating oil
dipstick
dipstick
Warning：Don’t fill engine oil when diesel is operating
10
．

2-2.3 Check the air filter
(1)Loosen the butterfly nut，take the cover
ofthe air filter off and take the air filter ele-
ment out．
11
Do not use detergent to wash the air filter
element．When the performance ofthe engine
decreases or when the color of the exhaust
gases is bad，exchange the filter element．
Never start the engine without the air filter
as foreign obj ects may enter the intake and
damage the engine．
(2)After replacing the air filter element，re-
place the cover and tighten the butterfly nut
firmly．
2-2.4 Checking the generator
(Note：Only certain welder generator sets
have an electricfan incorporated on them.)
Before starting the generator，make sure the
air switch is in the“off”position．Starting
the generator with the switch in the“on”
switch is very dangerous．
The generator should be grounded in order
to prevent electric shock．
Use dry compressed air(with pressure about
1.96×105 Pa)to blow the dust out in the
electric control cabinet and at the surface of
the generatonCheck to see how clean the sur-
face of the sliding ring is．Check the pressure
of the carbon brush．Also，check whether the
position of the carbon brush at the slide rig
is correct and the fixture is reliable with a
good contact．
According to the electric wiring diagram，
check to see whether the connecting wire is
correct and the connected place is firm．
tion resistance of the electrical part．The re-
．When
measuring devices，make sure the capacitor
is turned off．Otherwise,it will burn the
capacitor．(For the low noise set，the inspec-
tion may not be performed)．
Filter core
Indicating
lamp
AC output socket AC output
Fuse
Automatic air
Switch
Butterfly
nut
Air filter
cover

2-2.5 The fuel and oil in a new engine is
drained before sold．Before you start the
engine，please fill the fuel tank and engine
oil first．Then．check to see if there are air
bubbles in the engine．If there are，follow
these procedures．Loosen the connecting nut
between the oil inj ection pump and oil pipe．
Bleed the air from the system until there are
no more bubbles．Then replace the connect-
ing nut and tighten it．
12
2-3.1 Low-pressure alarm system．
2-3.2 Engine break in
2-3 Checking the operation of the die-
sel engine
The diesel engines have a low-pressure
sensor system where if the oil pressure
drops to low．the sensor will shut the
engine off．Thepurpose ofhavingthis
system is to ensure that the engine does
not seize up．If there is not enough oil
in the engine，the temperature of the oil
will be raised too high．On the contrary，
if there is too much oil in the engine，
the engine oil can slow the engine down
considerably．
(1)Avoid overloading the engine when
brand new．
(2)Change the engine oil according to
specifications．An oil change for a brand
new engine is about 20 hours or every mo-
nth，an older engine，the oil change is
about 100 hours or three months．
2-4 Starting the generator set
2-4.1 Manual starting．
Start the engine in accordance with procedures
below：
(1)Put the fuel switch in the“ON”position．
(2)Turn the handle of the engine to the
“RUN”position．
(3)Pull the recoil starter handle out un-
til you feel resistance．It will reset to its
original position automatically．The handle
should be reset into its recoil device slowly
to prolong the life ofthe life ofthe engine
starter．
(4)In cold climate，it iS difficult to start
the engine．To remedy this，pull the rubber
plug out from the rocker of the diesel en—
gine and fill 2 ml of engine oil．Before
starting，put the rubber plug back in place．
If you don’t put the rubber plug back in
place，rain，dust and other dirt can enter
into the diesel engine．It will cause the parts
inside the diesel engine to wear quickly and
lead to engine failure．
Speed handle

2-4.2 Electric starting
The procedures for preparing to start eh engine are the same as the manual starting engine．
1．Insert key into ignition and put it in the“off ”position．
2．Put the speed handle in the “Run”position．
3．TuITI the start switch clockwi~to the ‘‘START”position；to set the silent type，first turn
it clockwise to the “RUN”(ON)position for 1-2 seconds．The electromagnetic iron will be
triggered，now turn it clockwise to the“START”position．
4．After the diesel engine is started，remove your hand from the switch handle；the switch
will automatically reset itself t0 the“ON”position．
5．If the engine is not starting after 10 seconds of cranking，wait about 15 seconds before
trying it again．If you crank to long，the voltage of the battery will drop．This can lead
to improper ignition．When the diesel engine is operating，let the ignition retain on the
“ON”position．
13
speed handle
2-4.3 Battery
Important Notice：SOME OF OUR UNITS DO NOT COME WITH A BATTERY FOR
SHIPPING SAFETY PURPOSES．In order to get your generator started for the first time；
the battery must be purchased at a local hardware or automotive supply store．Please verify
the dimensions of the generator battery tray with the size of battery to be purchased．Also，all
diesel generators need to have a battery with a minimum of 36～38 amp hours．If you purcha-
se a dry battery and fill it with acid，please verify the acid level of the battery once a month．

2-5 Procedures for starting the generator set
This procedure applies to the GJD series recoil starting style models．
14

15

16
2-6 Proper operation of the generator set
2-6.1 Operating the diesel engine
1.Pre-heat the diesel engine for 3 min-
utes under no load conditions．
2.First check the height of the lubricat-
ing oil level，if it is low，refill it．
Our diesel engines are equipped with
an alarm system that will notify you if
the oil pressure is too low．The alarm
system will shut down the engine if
the oil pressure is too low．
3.Do not adjust the speed limit regula-
tion bolt or the fuel adj ustment bolt．
These bolts have been set by the fac-
tory already，changing them will af-
fect the porpertie s of the engine
performance．
2-6.2 Checks during engine operation
1. Check to see if there are abnormal noises.
2. Check to see if the performance is
good or bad．
3. Check the color of the exhaust gases
(whether it iS too black or too white)．
If any of these conditions exist，stop
the engine and find the cause of the
problem．If no problems are found，
please contact your local dealer or our
nearest company branch．
2-7 Loading
2.7.1 Load conditions
Exert loads in accordance with the
specified parameters．
2.7.2 Output of electricity
1.Raise the revolutions per minute(turn
the speed handle to the max setting)
of the generator to get the maximum
power out of the generator．If not，the
automatic voltage regulator device
will excite and doing this for long pe-
riods of time will cause the capacitor
to burn．For the rated speed of the
generator，please refer to Chapter 1，
item 1-1 technical specification and
data．
Fuel adjustment bolt Speed limit bolt
High-pres
fuel pipe nut
Fuel adjustment bolt Fuel adjustment bolt

17
2. Observe the pointerofthe voltmeter,it shouldpointto 230V/400V±5％(50Hz)．(For 60Hz
set,itwill be 240V±5％)．Meanwhile putthe switchinthe GEN(genemtor)position．
The AC voltage from the socket of the power supply canbe output．
3. When connecting devices to the generator，make sure to connect these devices in order．
Connect the large loads onto the generator first．If everything is functional，
smaller loads can then be added．If the generator shuts off,it may be because the
load being drawn by all the various devices are too high．In this event，decrease the
number of small devices until everything is functional．The total drawn power should
not exceed the maximum output power of the generator．Please see Table 1-1 for
technical specifications of what the generator can output．In order to reset the gen-
erator after overdrawn power，let it sit for several minutes．If the indication of the
voltmeter is too high or too low，adjust the speed accordingly．If there are problems，
stop the generator immediately and fix the issue．
4. During operation，the generator should be in a place that has very good ventilation．
Never cover the engine to solve a ventilation problem，as this will damage your
equipment．
Note：Do not start more than two devices simultaneously．Each device should
be started one by one to prevent overloading the generator．
The generator should be running at 3000/3600 revolutions per minute in order to
achieve the(50/60Hz)fequenty．The speed of the engine can be adjusted from
the speed governor．
2-7.3 Charging the battery
1. For the electric starter on the generator，the 12V battery is automatically charged
through the regulator on the side of the engine when it is running．
2. If the generator is not used for long periods of time，the battery should be discon-
nected to avoid energy loss from the battery．
3. Do not connect the negative and positive terminals of the battery together at any
time．Doing so will damage the battery．
4. Do not reverse the polarities when attaching the battery cables to the battery．Doing
so will damage both the battery and the electric starter．
5. When charging the battery,the battery produces flammable gases．Do not smoke，let
flames，and sparks far away the battery while it is charging as this may cause a fire．
To avoid sparking while connecting the cables to the bakery,first，connect the cables
to the battery then to the motor，To disconnect battery cables，first disconnect the
motor end of the cable．

18
2-8 Stopping the generator
1．Take the electrical load off the generator．
2．Putthe speedhandle inthe‘‘RUN”position and let the engine run for 3 minutes after
unloading．Do not stop the diesel engine immediately let it warm down．Stopping
the diesel engine suddenly may raise the temperature of the engine abnormally and
lock the nozzle and damage the diesel engine．
Note：
1.If the speed handle is in the “Stop’’ position and the engine is switch running，turn
the fuel switch to the “Off’’ position or loosen the high pressure oil pipe nut．The
engine could be stopped more than one-way other than the speed handle way．
2.If you cannot stop the engine with a 1oad on it．then remove the load first than stop
the engine．
3．Press down on the brake handle．
4．Ifequipped with an electric starter，turn the key to the“ Off' ”position．
5．Put the fuel handle to the“Stop”position．
6．Finally，pull slowly on the recoil handle until you feel resistance(this is when the
piston is on the compression stroke，where the intake and exhaust valves are closed)．
What this does is prevent the engine from rusting when not in use．

19
CHAPTER 3 MAINTENANCE
3-1 Maintenance schedules
Kepping your generator well maintained will prolong the life of your generator．Everything
needs to be checked including the diesel engine，welder，generator，control cabinet，and
frame．For overhauling procedures，please refer to the instruction manual of the relative
subassembly．If you need these manuals，plsaes call our company and we will send you one．
Before starting the maintenance，make sure the diesel engine is off．
Pleaes refer to the Table 3-1 for the proper maintenance schedule．
Table 3-1 Maintenance schedulefor diesel generator set
Interval of
Every time
1st month or 3rd month 6th month Every year
maintenance Item
after 20 hours
or 100 hours or 500 hours or 1000 hours
Check and fill enough fuel
Discharge fuel
Check and fill enough engine oil
Check whether it leaks oil
Check and screw each fastened part
Exchange engine oil
Clean filter of engine oil
(Exchange)
Exchange air filter element
Clean filter of fuel
(Exchangel)
Check high pressure oil pump
Check nozzle
Check fuel pipe
(If necessary,exchange it)
Adjust the gaps of air intake and air exhausted gate
Grind air intake and air exhausted gate
Exchange piston ring
Check electrolytic solution of accumulator
(each month)
Check electric brush and slide ring
Check insulation resistance
The time of stop is over 10 days.
Note:“ mark indicates that it needs special wrench,please contact with dealer.
If operated at dusty region the period of maintenance
should be shorten
(1st time) (2 nd time late)
head firmly
Screw the boII of cylinder head firmly
(Exchange)
(1st time)

20
3-1.1 Changing the engine oil(every l00 hours)
Take the oil cover out．Remove the oil drain
plug when the diesel engine is still hot．Be
careful of hot oil and hot engine as you may
get burned．The bolt is located at the bottom
of the cylinder．After draining the oil，put
the bolt back and tighten it．Then fill with
the proper engine oil to the proper level．
High-pressure
fuel pipe bolt
Oil drain bolt
Dipstick
3-1.2 Air filter maintenance schedule
1. Clean air-filter every 6 months or 500
hours of operation．
2. If necessary．exchange it．
3. Do not use detergent to clean air
filter element．
Note：
Never start the engine without the air filter．
This can cause serious damage to the engine
if foreign objects enter the intake system．
Always change the air filter on time．
3-1.3 Fuel filter maintenance
1. The fuel filter should be cleaned often to
keep the engine running at maximum pe-
rformance．
2. The recommended time period for clean-
ing the fuel filter is 6 months or 500 hours
of operation．
a.To do this，first drain the fule from the
fuel tank．
b. Loosen the small screws on the fuel sw-
itch and remove the fuel filter form the
port．Use diesel fuel to clean the fuel
filter．Also,remove the fuel injector and
clean the carbon deposit around it．The
recommended time period for this is 3
months or l00 hours．
3-1.4 Cylinder head bolt tensions
The cylinder head bolts should be tightened
to specifications please refer to the diesel
engine manual for specifications and the spe-
cial tools reuired to do this．
3-1.5 Battery check
Make sure the battery acid is full．The en．
gine uses a 12V battery．Due to numerous
starting cycles，the battery acid may be used
up．Also，before filling，verify that the bat-
tery is not damaged in any way．Add dis-
tilled water to the battery when filling．Per-
form checks on the battery once a month．

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3-2 Storing for long periods of time
If your generator needs to be stored for long periods of time，the following preparations
should be made．
1. Start the diesel engine for 3 minutes then stop it．
2. When the engine is still hot，change the engine oil with new engine oil of the proper
grade．
3. Pull the rubber plug out of the cylinder head cover and put 2CC of lubricating oil in it，
then cover the plughole up again．
4. For manual starting generator welders，press the decompression handle down and
pull the recoil handle 2 or 3 times．This pushes the intake out．(Do not start the engine)
5. For electric started generator，press the decompression handle down and crank the
engine for 2-3 seconds．To do this，put the starter switch in the“Start”position．
(Do not start the diesel engine)
6. Finally，pull the recoil starter until you feel resistance；this is when the piston is on the
compression stroke where the intake and exhaust valves are closed．Having the intake
and exhaust valves closed will prevent rust，as moisture cannot get inside the combus-
tion chamber．
7. Clean the engine and store it in a dry place．