LONCIN LC3500i User manual

LC3500i
Maintenance Manual
LONCIN MOTOR CO., LTD.

Safety Precautions
b
Please carefully read the Manual before operating
the generator unit. Safe operation and optimum
performance will only be achieved when the the
equipment is operated and maintained correctly.
Following marks will be found throughout the Manual
to remind you that there may be danger for the
operator, maintenance personnel and equipment.
Remind you that there may be
imperative danger that may cause severe personal
injury or death.
Remind you that there may be
dangerous situation that may cause severe personal
injury or death or unsafe operation.
Remind you that there may be
dangerous situation that may cause personal injury,
equipment damage or property loss or unsafe
operation.
Electricity, fuel oil, exhaust emissions, moving parts
and batteries may cause dangers, and safety
precautions for them must be followed to prevent
severe personal injury or death.
Exhaust Emissions may Cause Death.
The electric generator can only be operated
outdoors and the operator shall keep away from it.
Exhaust port.
Ensure that exhaust emissions from the generator
unit will not enter windows, doors, air vents or air
inlets of adjacent buildings, vehicles or vessels.
The generator unit is not allowed to be used in
residences, garages, basements, granary, wigwam,
cabins, vessels, vessel houses, entertainment
vehicles or tents, closed outdoor spaces (e.g.
alleys, irrigation canals and ditches, parking
garages or courtyards) or any other spaces where
exhaust emissions may accumulate. It shall be
noted that even though the unit is placed indoors
with all windows and doors opened and the air
blower turned on, the concentration of carbon
monoxide, which is harmful, in exhaust emissions
from the engine will also accumulate.
The Gasoline is Inflammable/Explosive.
The fuel oil can only be filled outdoors.
Electrostatic sparks caused by the fuel oil flowing
through the nozzles of oil pumps of gasoline
stations may ignite the gasoline. Nozzles of oil
pumps of gasoline stations are not allowed for
filling fuel oil to the generator unit. Instead, the
fuel oil shall be filled to a explosion-proof fuel
tank placed on the ground first, and then to the
generator unit slowly.
The fuel oil shall not be filled to the generator
during operation. The engine of high temperature
may ignite the fuel oil.
To prevent fire resulted from fuel oil leakage, fuel
valves must be closed and the generator unit must
be cooled down before transporting the generator
unit or preserving it in a closed space.
Smoking and open fire are strictly prohibited
adjacent to the generator unit. Flame, sparks,
electric switches, pilot torches, electric arcs,
equipment generating electric arc as well as any
other ignition sources must be kept away from the
generator unit.
The Voltage of Generator Unit may Cause
Death.
It is not allowed to connect the generator unit to
the electric system of buildings directly. The
feedback current may cause death of electric
power circuit workers due to electric shock and
equipment damages. An approved switchgear
must be used to prevent the connection with
generator unit. Under circumstances of using the
generator unit as power supply for emergencies,
trained and experienced electricians must be
selected to conduct electrical connection.
Make sure your clothes, shoes and skin are dry
when operating electrical equipment.
It is strictly prohibited to operate the generator
unit in rains or snows or on wet ground.
Moving Parts may Cause Severe Personal
Injury or Death.
The spark plug wire shall be disconnected before
any maintenance for the generator unit.
Both of your hands must keep away from moving
parts.

Safety Precautions
c
It is not allowed to repair the generator unit with
loose clothes or jewelry as they may be caught
into moving parts. The jewelry may cause short
circuit of electric terminals, sparks, flame and
electric shock.
Make sure fasteners and fixtures on the generator
unit are securely installed. Shields of fans, rotors,
etc. shall be installed in place.
The Gas Emitted by Batteries is Explosive.
Protective glasses shall be worn when repairing
batteries.
Smoking shall not be allowed.
To reduce electric arcs generated from
disconnecting or reconnecting cables of batteries,
negative (-) electrodes of batteries must be
disconnected in advance and connected at last for
re-connection.
General Precautions
Make sure that children are away from the
generator unit.
Hearing protective devices must be worn when
getting close to the generator unit under operation.
A multi-class (ABC) fire extinguisher shall be
placed near hand. The class-A fire is caused by
general inflammables such as wood and cloth.
The class-B fire is caused by inflammable and
explosive liquid and gas fuels. And the class-C
fire is caused by live equipment (refer to NFPA
NO. 10).
The following instructions and precautions in an incorrect way may
cause severe personal injury or death.
Please follow procedures and precautions in the Manual carefully.
Rocker arm
Incorrect maintenance or repair may result in unsafe situations and
may cause severe injury or death of your clients or other personnel.
Please follow procedures and precautions in the Manual and other
maintenance materials carefully.

Contents
d
Chapter I Introduction
1-1 Structure of electric generator........................................................................................................................1
1-2 Technical specifications.................................................................................................................................2
Chapter II Repair standards
2-1 Standards for engine repair ............................................................................................................................3
2-2 Standards for electric generator repair...........................................................................................................4
2-3 Torque parameters of fasteners......................................................................................................................4
2-4 Torque parameters of standard parts..............................................................................................................5
Chapter III Maintenance
3-1 Maintenance schedule....................................................................................................................................6
3-2 Change engine oil ..........................................................................................................................................7
3-3 Air filter .........................................................................................................................................................8
3-4 Cleaning of the fuel filter...............................................................................................................................9
3-5 Spark canceller...............................................................................................................................................9
3-6 Spark plug....................................................................................................................................................10
3-7 Adjustment of valve clearance.....................................................................................................................11
Chapter IV Faults & Repair
4-1 Fault diagnosis .............................................................................................................................................12
4-1-1 Difficulty in starting..............................................................................................................................12
4-1-2 Low power ............................................................................................................................................13
4-1-3 Unstable speed ......................................................................................................................................14
4-1-4 Low speed/voltage ................................................................................................................................15
4-1-5 Abnormal exhaust colors ......................................................................................................................16
4-1-6 No alternating current output voltage ...................................................................................................17
4-1-7 No direct-current output voltage ...........................................................................................................17
4-2 Prepare for repairs ........................................................................................................................................18
4-2-1 Safety Precautions.................................................................................................................................18
4-2-2 Special tools ..........................................................................................................................................18
4-3 Diagram for disassembly..............................................................................................................................19
4-4 Engine ..........................................................................................................................................................20

Contents
e
4-4-1 Crankshaft/piston ..................................................................................................................................20
4-4-2 Cylinder head/valve ..............................................................................................................................28
4-4-3 Flywheel/ignition coil/igniter/hand starter............................................................................................34
4-4-4 Carburetor .............................................................................................................................................37
4-5 Generator......................................................................................................................................................40
4-5-1 Fuel tank................................................................................................................................................40
4-5-2 Silencer .................................................................................................................................................41
4-5-3 Rack baseplates.....................................................................................................................................42
4-5-4 Motor parts............................................................................................................................................43
4-5-5 Inverter parts .........................................................................................................................................45
4-5-6 Control panel parts................................................................................................................................48
4-5-7 Appearance assembly............................................................................................................................53
Chapter V Circuit Diagram ...............................................................................................................................54

Chapter I Introduction
- 1 -
1-1 Structure of electric generator
消声器
Shutter
Carburetor
Air
filter
Oil-level
gauge
Left
appearance
cover plate
Fuel tank
Spark plug
Silencer
Inspection
window for
engine oil
Hand tube
combination
Inverter
parts
Starting
handle
Supporting
wheel parts
Control
panel parts
Maintenance
cover of
batteries
Batteries
Right shell of electric
generator
Right
appearance
cover plate
Top cover of rack
Fuel tank cap
Gum cover of oil inlet
Brake handle

Chapter I Introduction
- 2 -
1-2 Technical specifications
Unit Model
LC3500i
Electric Generator
Type
Variable frequency
Frequency/Hz
50/60
Nominal voltage/V
100/120/230
Maximum power output/kVA
3.3
Rated power output/kVA
3.0
Power factor
1.0
Quality of AC output
ISO8528 G2
Waveform deviation factor/%
≤5
Noise acoustical power (3/4
load)
87.5
DC output/V-A
12-8
Overload
protection
DC
No fuse overcurrent protector
AC
Controlled by the overcurrent protection
program of inverter
Engine
Model of engine
LC170FD-3
Type of engine
Single-cylinder, four-stroke-cycle, forced-air
cooling and overhead valve
Displacement/cc
212
Type of fuel oil
Unleaded gasoline
Engine
Fuel tank capacity/L
9
Continuous operating period/h
(rated output)
6
Capacity for engine oil/mL
600 ml
Model of spark plug
E6TC/E6RTC
BPR6ES/BP6ES (NGK)
Starting mode
Hand starting
External Dimensions
L × W × H/mm
578 * 440 * 510
Net Weight/kg
45

Chapter II Repair Standards
- 3 -
2-1 Standards for engine repair
Unspecified unit: mm
Part
Item
Standard
Service limit
Engine
Maximum no-load speed
Cylinder pressure
5,000 rpm
≧1.17 Mpa (1,400 rpm)
6,000 rpm
--
Cylinder
Inner diameter of cylinder
70
70.165
Piston
Skirt O.D.
69.985
69.845
Piston-to-cylinder clearance
0.015-0.05
0.12
Piston pin bore ID
18.002
18.048
Piston -to-piston pin bore clearance
0.002-0.014
0.06
Piston pin
Outside diameter
18.0
17.954
Piston rings
Ring side clearance (Top/Second)
0.015-0.045
0.15
Ring end gap (Top/Second)
0.2-0.4
1.0
Ring end gap(Oil ring)
0.15-0.35
1.0
Ring width (Top/Second)
1.0
0.88
Ring width (Oil ring)
2.5
2.37
Connecting rod
Small end I.D.
18.002
18.07
Big end I.D.
30.02
30.066
Big end oil clearance
0.04-0.063
0.12
Big end side clearance
0.1-0.7
1.1
Crankshaft
Crankshaft O.D.
29.98
29.92
Valves
Clearance(cold) (IN)
0.10~0.15
－
Clearance(cold) (EX)
0. 10~0.15
－
Stem O.D. (IN)
5.48
5.318
Stem O.D. (EX)
5.44
5.275
Valve guide
I.D. (IN,EX)
5.50
5.572
Stem-to-guide clearance (IN)
0.02-0.044
0.10
Stem-to-guide clearance (EX)
0.06-0.087
0.12
Valve seat
Seat width
0.8
2.0
Valve spring
Free length
30.5
29.5
Camshaft
Cam height (IN)
27.7
27.45
Cam height (EX)
27.75
27.50
O.D. (bearing section)
13.984
13.916
Crankcase cover
Camshaft holder I.D.
14.0
14.048
Carburetor
Main nozzle
0.65
－
Float height
13.7±1.5
－
Number of turning circles of mixture
adjusting screw
2-1/8 circles
－
Spark plug
Gap
0.7-0.8
－
Ignition coil
Air gap (at flywheel)
0.4±0.05
－

Chapter II Repair Standards
- 4 -
2-2 Standards for electric generator repair
The resistance among windings of 230 V 2 KW is as follows:
Color of Guide Line
Resistance
Main winding
Brown
2.0-2.4 Ω
Power supply
winding
Orange
0.50-0.55 Ω
DC winding
Blue
0.19-0.21 Ω
The resistance among windings of 120 V 2 KW is as follows:
Color of Guide Line
Resistance
Main winding
Brown
0.75-0.85 Ω
Power supply
winding
Orange
0.50-0.55 Ω
DC winding
Blue
0.19-0.21 Ω
The resistance among windings of 100 V 2 KW is as follows:
Color of Guide Line
Resistance
Main winding
Brown
0.57-0.67 Ω
Power supply
winding
Orange
0.50-0.55 Ω
DC winding
Blue
0.19-0.21 Ω
2-3 Torque parameters of fasteners
Fastening Item
Fastening Parts
Fastening Torque (N.m)
Fastening bolt of connecting-rod
M7 × 1
12-14
Fastening bolt of cylinder head
M8 × 1.25
32-35
Fastening bolt of flywheel
M8 × 1.5
30-36
Fastening bolt of crankcase cover
M8 × 1.25
26-32
Seal screw plug (crankcase-body oil
drain plug)
M10 × 1.25
20-25
Mounting nut of air filter
M6 × 1
8-12
Mounting nut of silencer
M8 × 1.25
27-30
Fastening nut of speed-regulating
support
M6 × 1.0
9-13
Fastening bolt of starting motor
M6 × 1.25
8-12
Spark plug
27-30

Chapter II Repair Standards
- 5 -
2-4 Torque parameters of standard parts
Standard Torque Value
Fastening Parts
Fastening Torque (N.m)
5 mm Bolt and nut
4-7
6 mm Bolt and nut
8-12
8 mm Bolt and nut
20-28
10 mm Bolt and nut
35-40
12 mm Bolt and nut
50-60

Chapter III Maintenance
- 6 -
3-1 Maintenance schedule
Favorable maintenance is the best guarantee to
achieve the safe, economical and zero fault operation. In
addition, it also contributes to the environmental
protection. When operating in hot or dusty environment,
the frequency of some maintenance shall be increased as
specified in notes below the table.
The data of maintenance and operation shall be
recorded. Maintenance records will help you to conduct
periodic maintenance and provide evidence for your
warranty requirement.
Accidental starting of the generator unit
during maintenance may cause severe personal injury
or death. The spark plug wire must be disconnected
prior to maintenance.
The generator unit of high temperature
may cause severe scald. Maintenance or repair must
be conducted after the generator unit is completely
cooled down.
Periodic Maintenance Schedule
Periodic Maintenance Schedule
Time
of Use
20 H or the First
Month of Initial
Use (3)
50 H or
Every 3
Months (3)
100 H or
Every 6
Months (3)
300 H or
Every Year (3)
Engine oil
Check the
oil level
○
Replaceme
nt
○
○
Air filter
Check
○
Clear
○(1)
Fuel filter
Clear
○
Spark canceller
Clear
○
Spark plug
Clear
○
Replacement
Valve clearance
Readjustme
nt
○(2)
Cylinder head
Wash
Every 500 h (2)
Fuel tank & strainer
Wash
Every 2 years (2)
Oil pipe
Replaceme
nt
Every 2 years (2)
(1) Maintenance intervals shall be shortened when it is used in a place full of dusts.
(2) These maintenance items shall be conducted with supports from LONCIN franchised dealers.
(3) Under circumstances of frequent use, long-term use can only be guaranteed through maintenance with
correct intervals specified above.

Chapter III Maintenance
- 7 -
3-2 Change engine oil
Note: the engine oil shall be discharged under the
circumstance of heat engine, so that the discharge
can be conducted rapidly and completely. Do not
discharge the engine only immediately after the
electric generator is powered off. As the temperature
of engine oil is extremely high, please be careful to
prevent scald during operation.
1) Please place the electric generator onto the level
plane.
2) Loosen the hand-rotary type unloosening screw ①
and remove the inspection window for engine oil
②
3) Uplift and tilt the machine, remove the end cap on
the baseplate ③.
4) Open the oil-filling cover ④and pour out the
engine oil in the crankcase.
5) Place the oil basin below the baseplate of machine,
remove the oil drain plug ⑥and the the engine oil
will be discharged from the fuel tank.
6) Check the oil level gauge ④, seal ring ⑤, drain
plug ⑥and seal gasket ⑦. If any damages are
observed, please replace them at once.
7) Re-install the oil drain plug and seal gasket.
8) Place the engine onto a level position in halt status
and fill new engine oil till the oil level reaches the
upper limits of the gauge. Screw the oil-filling
cover.
9) Re-install the inspection window for engine oil and
fasten the screw; re-install the drain end cap.
Note: prior to each use, please place the electric
generator onto a level plane and check the engine oil
level in halt status of the engine.
1. Remove the oil level gauge and wipe out the engine
oil.
2. Insert the oil level gauge into the oil-filling hole but
do not screw it up, then check the oil level.
3. If the oil level is too low, fill the recommended
engine till it reaches the upper limits indicated by the oil
level gauge.

Chapter III Maintenance
- 8 -
Skin cancer may be caused by the
long-term and frequent contact with engine oil.
Though it is not inevitable, we still recommend
washing your skin contacted the engine oil clean
with soap and water.
3-3 Air filter
Air filterAir inflow will be affected and
the power of engine will be reduced after the filter
cartridge gets dirty. If the operation area is full of
dust, the maintenance shall be conducted more
frequently.
Washing the filter cartridge with
gasoline or inflammable solvent may case fire or
explosion. Only soap water or nonflammable solvent
can be used.
It is strictly prohibited to operate the
electric generator without air filter, or the abrasion
process of engine will be accelerated.
1) Remove the unloosening screw ①and the
appearance cover plate ②.
2) Remove the air filter cover and foam filter cartridge
①
3) Wash the foam filter cartridge with solvent and dry
it
4) Drop clean engine oil into the foam filter cartridge
and knead it till even, edge out redundant engine oil
and make it be distributed evenly in the filter
cartridge. Do not twist the foam filter cartridge hard
to avoid damage.
5) Place the foam filter cartridge into the air filter.
Hint
Please confirm that the surface of foam filter
cartridge is cling to the air filter without any
interspaces for air leakage
Do not start the engine without air filter as the
excessive poison gas and abrasion of the fuel tank
Recommended engine oil:
SAE 10W -30
Recommended engine oil level:
API standard SE or higher level
Capacity for the engine oil:
0.6 L (0.72US qt, 0.6 lmp qt)

Chapter III Maintenance
- 9 -
will be caused.
6) Install the filter cover to its original position.
3-4 Cleaning of the fuel filter
The fuel filter cup is to prevent the dust or water
from entering into the carburetor. The filter cup shall be
cleaned after long time without operation of the engine.
1) Remove the unloosening screw ①and the
appearance cover plate ②, then pour out the
fuel oil in the fuel tank ③.
2) Hold the clamp ④and move it down, then pull
out the oil tube ⑤connected to the fuel tank
downward.
3) Take out the fuel filter ⑥.
4) Wash the fuel filter with gasoline.
5) Wipe out the fuel filter, install it onto the oil
nozzle ⑦of fuel tank and screw it down, then
place the oil tube onto the oil nozzle and install
the clamp.
6) Install the oil tube back as well as the clamp,
switch on the fuel valve and check if there is
any leakage.
7) Install the appearance cover plate back.
The gasoline is extremely inflammable
and explosive. Smoking, open fire and sparks are
strictly prohibited in the operation area.
After the re-installation is completed,
the operator shall check if there is any fuel leakage
and make sure the operation area is dry prior to
starting the engine.
3-5 Spark canceller
The silencer of high temperature may
cause severe scald. The generator unit shall be cooled
down prior to the maintenance of silencer.
Please refer to the “Maintenance Schedule” for the
cleaning of spark canceller. Remove the mesh of spark
canceller after the electric generator is cooled. Check if
there are any damages and change damaged one. Sweep
away the carbon deposition accumulated on the mesh
with wire brush. Re-install the spark canceller and
fasten the screws.

Chapter III Maintenance
- 10 -
3-6 Spark plug
The use of spark plug with incorrect models or
heat values may reduce the engine performance or
damage the engine.
The spark plug and silencer will be overheated
under the continuous operation of the engine. Take care
not to touch the silencer or spark plug.
1) Loosen the unloosening screw ①and remove the left
appearance cover plate ②.
2) Remove the spark plug cap ③, place the sleeve ④
onto a proper position on the spark plug.
3) Insert the driver ⑤into the sleeve and rotate it along
anti-clockwise direction to remove the spark plug.
4) Check the spark plug.Model of the spark plug:
E7RTC/F7TC
BPR6ES / BP6ES (NGK)
If the machine is required to meet the EMC
certification, only the E6RTC spark plug can be
used.
The spark plug shall be replaced under
circumstances of damaged electrodes and insulators. If it
can be further used, sweep away the impurities
including carbon deposition, etc. accumulated on the
spark plug with wire brush.
5) Measure the clearance of spark plug with thickness
gauge. Adjust the clearance through bending the
side electrodes carefully. The clearance between
electrodes shall be 0.60-0.70 mm.
6) Check the status of gasket of spark plug. Screw in
the spark plug with hands during the installation of
spark plug to prevent incorrect match of screw
threads.
7) After pressing the gasket with spark plug, impact
them tightly with the socket spanner of spark plug.
When installing new spark plug, screw 1/2 circle
more after the gasket is impacted. When
re-installing the used spark plug, screw 1/8-1/4
circle more after the gasket is impacted.
Spark plug torque value: 20.0 N*m (2.0 kgf*m,
14.8 lbf*ft)
The spark plug must be securely
fastened, or the engine may be damaged.
Please use the recommended or
equivalent spark plug.Spark plug of improper heat
values shall be prohibited.
0.6-0.7 mm
Side electrode
Wire brush

Chapter III Maintenance
- 11 -
3-7 Adjustment of valve clearance
The check and adjustment of valve
clearance must be conducted when the engine is cold.
1) Take apart the cylinder-head cover, pull the
starting handle until you feel the obvious resistance
to make the piston reach nearby upper dean center
of compression stroke. At this time, both inlet and
exhaust valves are in the closed status.
2) Insert the thickness gauge into the clearance
between the rocker arm and valve to measure the
valve clearance.
3) Operate as per the following steps if the adjustment
is required:
a) Fix the valve-adjusting screw with a clamp
and unscrew the valve lock nut with a spanner.
b) Rotate the valve-adjusting screw and adjust it
to the specified valve clearance.
c) Fix the valve-adjusting screw with a clamp
and fasten the valve lock nut.
d) Re-check the valve clearance after fastening
the lock nut.
Standard Valve
Clearance
Inlet
0.10 ~ 0.15 mm
Exhaust
0.10 ~ 0.15 mm
ROCKER ARM
PIVOT
LOCK NUT
To increase valve clearance, screw out the pivot
To decrease valve clearance, screw in the pivot
FEELER GAUGE

Chapter IV Disassembly & Repair
- 12 -
4-1 Fault diagnosis
4-1-1 Difficulty in starting
(Refer to Section 4-4-2)
Ignition system
Compression
system
(Refer to Section 4-4-1)
(Refer to Section 4-4-2)
(Refer to Section 4-4-2)
(Refer to Section 4-4-2)
(Refer to Section 3-7)
(Refer to Section 4-4-1)
(Refer to Section 4-5-6)
(Refer to Section 4-4-3)
(Refer to Section 4-4-3)
(Refer to Section 3-6)
(Refer to Section 3-2)
Difficulty in
starting
Fuel system
(Refer to Section 3-3)
(Refer to Section 4-4-4)
(Refer to Section 3-4)
(Add fuel oil into the fuel tank)
Fuel oil level too low
Fuel filter blocked
Improper adjustment of carburetor
Air filter dirty
Engine oil level two low
Improper spark plug gap
Fault of spark plug cap
Fault of ignition coil
Fault of starting switch
Fault of engine-oil protective system
Improper valve clearance
Cylinder-head gasket damaged
Loosen fastening bolt of cylinder head
Valve fault
Wear of cylinder/piston/piston ring
Excessive wear of camshaft
(Re-start after stopping for several minutes)
Excess fuel oil flowing into the engine

Chapter IV Disassembly & Repair
- 13 -
4-1-2 Low power
(Refer to Section 4-5-2)
(Refer to Section 4-4-1)
(Clean)
(Refer to Section 4-5-4)
(Refer to Section 4-4-4)
(Under the “operation” position)
(Refer to Section 3-3)
(Refer to Section 4-4-3)
(Refer to Section 3-6)
(Refer to Section 4-4-1)
(Refer to Section 3-7)
(Clean)
(Refer to Section 4-4-2)
(Refer to Section 3-4)
Low power
Fuel system
Ignition system
Compression
system
Improper adjustment of carburetor
Fuel filter blocked
Choke-valve handle not opened completely
Air filter dirty
Fault of spark plug cap
Fault of ignition coil
Wear of cylinder/piston/piston ring
Improper adjustment of valve clearance
Cooling fan dirty
Wear or damage of valve seat
Cylinder cooling fin dirty
Silencer blocked
Motor phase loss & short circuit for some
turn-to-turn of machine winding
Others
(Use new fuel oil of specified quality)
Poor quality of fuel oil
(Disconnect surplus load)
Excessive electrical load
Wear of camshaft

Chapter IV Disassembly & Repair
- 14 -
4-1-3 Unstable speed
Fuel oil is of low level/of poor
quality/polluted
Fuel filter blocked
(Refer to Section 3-4)
(Use new fuel oil of specified quality)
(Refer to Section 4-4-4)
Carburetor blocked
(Refer to Section 4-4-2)
(Refer to Section 4-4-1)
(Refer to Section 3-7)
Unstable
speed
Fuel system
Compression
system
Improper adjustment of valve clearance
Wear and air leakage of valve seat
Wear of camshaft
(Refer to Section 4-4-4)
Speed-regulating
system
Speed-regulating step motor damaged
(Refer to Section 4-5-5)
Speed-regulating part of converter
damaged
(Add new engine oil)
Others
Engine oil level too low
(Disconnect surplus load)
Excessive electrical load

Chapter IV Disassembly & Repair
- 15 -
4-1-4 Low speed/voltage
(Refer to Section 4-5-4)
(Refer to Section 4-5-4)
(Refer to Section 4-4-4)
(Under the “operation” position)
(Refer to Section 4-4-4)
(Refer to Section 3-3)
Low
speed/voltage
Fuel system
Water inside the carburetor
Choke-valve handle not opened completely
Air filter dirty
Fault of step motor
Motor phase loss and short circuit for some
turn-to-turn of machine winding
High temperature of alternator
Others
(Refer to Section 4-5-4)
(Disconnect surplus load)
Excessive electrical load
(Use new fuel oil of specified quality)
Fuel oil is of poor quality/polluted
High temperature of alternator
(Refer to Section 4-5-5)
Fault of converter
Speed-regulating
system