UST GG7500N Series User manual

Owner s Manual
GG7500N Series Gasoline Generators
Do Not Return To Store
866 797 2738
Read carefully before attempting to assemble, install, operate or maintain the product described. Protect
yourself and others by observing all safety information. Failure to comply with the user , s manual
could result in personal injury and/or property damage! retain the user ,s manual for future
reference.call toll free number 866 797 2738 for parts and service.
Distributed by
Fullerton, CA 92833
One year or 60 hours Limited Warranty (see page23)
For customer service or warranty information call toll free
DISCLAIMER:All picturesmay notbe identicalto productinside box.

SAFETY ALERT SYMBOL: Indicates danger, warning, or
caution.Attention is
required in order to avoidserious personal injury.
The signal word (DANGER, WARNING, or CAUTION) is used with the alert
symbol toalert youto specialinstruction abouta particularoperation
that may be hazardous if pe rformed incorrectly or carelessly. Observe them
DANGER: Failure to obey a safety warning will result in
serious personal injuries or deaths.
WARNING:Failure to obey a safety warning can result in
serious personal injuries or deaths.
CAUTION:Failure to obey a safety warningmay result in
minor or moderate injuries
carefully.
CAUTION:Never remove the caution symbols. Failure to follow all
instructions may cause damage to your engine or other property.
If you do not understand any portion of this manual, about engine,
please call customer service.

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CONTENTS
1.SAFETY
2.COMPONENTIDENTIFICATION
3.PRE-OPERATION CHECK LIST
4.STARTING THE ENGINE
5.GENERATOR USE
6.STOPPINGTHE ENGINE
7.MAINTENANCE
8.STORAGE
9.TROUBLESHOOTING
10.WIRING DIAGRAM
11.SPECIFICATIONS
12.WHEELKIT
13.PARTS LIST AND DIAGRAM
13.1 CRANKCASE ASSY.
13.2 CYLINDER HEAD ASSY.
13.3 CAMSHAFT ASSY.
13.4 CRANKSHAFT ASSY.
13.5 CRANKSHAFT ASSY. & PISTON
13.6 CENTRIFUGALTIMING IMPLEMENTASSY.
13.7 INFLAME ASSY.
13.8 STARTER ASSY.
13.9 ENGINE SPROCKET COVER
13.10 CARBURETOR ASSY.
13.11AIR CLEANERASSY.
13.12 CHOKE ROD ASSY.
13.13 GENERATOR
13.14 GAS TANK ASSY.
13.15 PANEL ASSY.
13.16 MUFFLER ASSY.
13.17 MOTOR SHIELD ASSY
13.18 FRAME ASSY.
13.19ACCESSORIES.
13.20 EXHALATION SYS
14 PARTS REPLACEMENT LIMITED WARRANTY
15 PRODUCT REGISTRATION CARD
1
3
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5
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24

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- 1 -
1. SAFETY
1.1 SAFETYLABELS
ADD OIL
BEFORE
USE
ADD OIL
BEFORE
USE
Connect ground to earth
before operating
Connect ground to earth
before operating
Using a generator indoors CAN KILL YOU IN MINUTES.
Generator exhaust contains carbon monoxide. This is
a poison you cannot see or smell.
Only use OUTSIDE and
far away from windows,
doors, and vents.
NEVER use inside a home
or garage, EVEN IF doors
and windows are open.

DO NOT CONNECT TO HOUSEHOLD
CIRCUIT.
DO NOTUSE INSIDEAHOUSE
OR ANYENCLOSED AREA.
DO NOT LEAVE THE GENERATOR EXPOSEDTO
RAIN, SNOW OR SLEET. IF THE WORKING PARTS
OF THE GENERATOR GETWETIT WILLCAUSE THE
GENERATOR TO FAIL. EXCESSIVE MOISTURE
DAMAGES THE ROTORAND STATOR OFTHE
GENERATOR.
CAUTION:HARD WIRINGTHIS
GENERATOR TOABUILDING S
POWER SYSTEMIS NOTADVISABLE.
`
1.2 GENERATOR SAFETY
- 2 -
WARNING:User assumesall risksto hisperson orproperty for
failure to heed thesewarnings.

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DO NOT SPILL. STOP ENGINE.
BEFORE REFUELING
NO SMOKING.
KEEP FLAMMABLE MATERIAL
AT LEAST 1m(3FT).AWAY
- 3 -
2.COMPONENT IDENTIFICATION
1 FUEL TANK CAP
2 FUEL TANK
3 FUEL GAUGE
4 ENGINE SWITCH
5 DC PROTECTOR
6 DC TERMINALS
7 HOUR METER
8 VOLTMETER
9 CIRCUIT BREAKER
10 HANDRAIL
11 DOUBLESOCKET
12 FORE POLE SOCKET
13 GROUND TERMINAL
14 OIL FILLERCAP
15 WHEEL
16 RECOIL STARTER
17 FUEL VALVE
18 AIR CLEANER
19 CHOKE ROD
20 FRAME
21 FRAME COVER
22 CHECK VALVE
17
18
19
20
21 1234567
8
9
10
11
12
13
14
15
16
22

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3.PRE-OPERATION CHECK
- 4 -
.
WARNING:

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3.AIRCLEANER
1.Unsnap theair cleanercover springs,andremove theair cleanercover
2.Check theair cleanerelement tobe sureit isclean andin goodcondition.
3.If it isdirty,remove and clean
the element. (1)Wash in solvent (2)Squeeze
(3)Soak oil
(4)Squeeze dry
4.Reinstall the air cleaner element
and secure the coverby setting
the cover spring.
4.STARTING THEENGINE
1.Disconnect any load from the
AC receptacle. 2.Turn the fuelvalve to the ON position.
3.Pull the choke rodout to the CLOSED position.
Check the air cleaner element tobe sure itis clean.
4.Turn the engine switchto the
ON position.
- 5 -

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5.GENERATOR USE
5.Pull thestarter griplightly untilresistance isfelt
then pullbriskly.
1.To prevent electrical shock fromfaulty appliances, the generator
should be grounded.
2.Combined load of the connected apparatusmust not exceed the rated capacityof the generator
Electric apparatus, particularly motor-drivenequipment, will draw a higher currentwhen starting. The
following table is providedfor your reference when connectingsuch apparatus to your generator.
Warning:Do notallow thestarter gripto snap
back againstthe engine.
Return itgently.
6.Push thechoke rodto the OPEN position
as theengine warmsup.
To keepthe generatoralways intop mechanicaland electricalcondition, observethe following:
WARNING
TYPE WATTAGE
STARTING
RATED
TYPICALAPPARATUS
EXAMPLE
APPARATUS
STARTING
RATED
Incandescent lamp Incandescent lamp
100W
100VA
(W)
100VA
(W)
X1 X1
X2 X1.5
X2
X3~5
Fluorescentlamp
Fluorescentlamp
80VA 60VA
(W) (W)
40W
Refrigerator
Electricfan
Refrigerator
150W
450~750VA 300VA
(W) (W)
Incandescent lamp
Heating appliance
Fluorescent lampMotor driven equipment
TV
- 6 -
Connect a copper wire to the generator and the other end of wire
to a metal stake driven into the ground.

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3.When twoor morepieces ofapparatus areconnected toyour generator, turnthem onbeginning
with theone drawinghigher currentwhen starting.
1.Start theengine
2.Make surethat theneedle onthe voltmeterindicates thevoltage.
3.Plug inthe appliance
Note:
a: Overcurrent willautomatically turnoff theACbreaker.When thatis
turned off,the generatorshall berestarted withload reduceda few
minutes thereafter.
B: Generally5-10% varianceof voltageoutput isallowed.
ACAPPLICATION
- 7 -
ON
OFF

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DC APPLICATION
The DCterminals maybe usedfor charging12V automotive-typebatteries only
1.Connect thecharging cablesto thebattery terminal.
2.Start theengine andcharge thebattery
An overloadedDC circuitwill tripthe DCcircuit breaker
(push buttoncomes out)If thishappens. Checkthe short
circuit orcounter connectionand waita fewminutes
before pushingthe circuitprotector.
NOTE:
3.Stop theengine, thendisconnect the
charging cablesin thereverse orderof
connection.
1.Turn off allelectrical appliances.
6.STOPPING THE ENGINE
2.Turn theengine switch
to the OFF position.
3.Disconnect theelectrical
appliance. 4.Turn thefuel valveto the
OFF position.
NOTE: To stopthe enginein anemergency,turn theengine switchOFF.
1ON2OFF
- 8 -

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1.Remove the oil filler cap.
2.Remove the drain plug and drain the oil.
3.Dispose of oil property.
1.OIL CHANGE
4.Install the drain plug and tighten it securely.
5.Refill with the motor oil(see 3 page)and check the oil level
ENGINE OIL CAPACITY:37.2oz(1.1 Liter)
6.Install the oil filler cap.
Recommended oil:4-stroke motoroil serviceclassification SJ,SL,SGor SAE10W-30for general
temperature.
7.MAINTENANCE
(1):These itemsshoule beserviced bya dealer.
(2):Every 3years
Check Change Clean Check-Readjust
First month
or Every 3 months
or Every 6 months or Every year
or SEE page
P.3
P.9
P.3
P.3
P.9
P.9
Engine
oil
Air cleaner
Fuel strainer
Battery
fluid level
Spark plug
Valve Clearance
Combustion
Chamber
Fuel line
()
1
()
1
- 9 -

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2.AIR CLEANER(See4 page)
3.SPARKPLUG
1.Remove thespark plugcap. 2.Remove thespark plug.
3.Clean thedeposit.
4.Measure thegap.
5.Reinstall thespark
plug andplug cap.
4.FUEL STRAINER
3.Install thefuel filterscreen andsediment cup.
1.Close the fuel valve, drain
the fuel from the fuel tank. 2.Drain the fuel from the carburetor. 3.Remove the oil filler cap and drain plug to drain
the oil.
4.Tighten the oil drain plug
and fill the engine with
new oil to the filler neck. 5.Pull the starter grip carefully
until resistance is felt. 6. Store the generator in a clean area.
1.Turn thefuel valve
to theOFF position
and removethe se
diment cupand
filter screen.
2.Clean thesediment
cup andfuel filter
screen.
8.STORAGE
- 10 -
0.7~0.8mm(0.028~0.031in)
TYPE:F7RTC(NGK-BPR6ES)

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9.TROUBLE SHOOTING
9.1 ENGINE DOES NOT START:
1.Turn on the engine switch.
2.Check fuel. 3.Check oil.
4.Remove spark plug.
5.Check spark.
9.2 NO ELECTRICITY:
Check ACcircuit breaker
- 11 -
ON
OFF
9.3 LIGHTS FLICKERING
1. Checkfor looseconnections
2. Checkfor loosebrushes and clean commutator
3. Checkfor properload..Acertain amountof flashing
is normalwith alight tomoderate load
4. Checkand adjustidle speedcontrol screw1/4-1/2
turn counter clockwise.
5. Checkand cleancarburetor.
Idle speed
control screw

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In caselong termstorage generatorhas nooutput whenstarted, pleasedisconnect all
appliances andprod theARMto increasethe throttleuntil thevolt-meter indicatesvoltage
10.WIRING DIAGRAM
- 12 -
BLBL
R R
BLW
Br W
WW
BL
G
Br
W/R
Br
Br
Br
BL
BL
G
R
W
G
RR
BL
G
W
B
BLBL
C
G
Y
R
G/W
G/W G
BB
G/W
G/W Y
G/W Y
DC PROTECTER
(+)
(-)
DC
WINDING
MAIN
WINDING
R
W
G
BL
B
BR
VOLT METER
CIRCUIT
BREAKER
CIRCUIT
BREAKER
AC OUT
DIODE
DIODE
Y
RED
WHITE
GREEN
BLACK
BLUE
BROWN
YELLOW
SPARK
PLUG
IGNITION COIL
SOLENOID
VALVE
OIL LEVEL
SWITCH
OIL
ALERT
UNIT
ENGINE
SWITCH
GROUND
TERMINAL
DC OUT
BL
FIELD WINDING
EXCITER
WINDING
BL
AVR
Gr
Gr
R
Br
Gr
BL
W/R
NOTE:This engineis notdesigned tobe pluggedinto ahousehold circuit. User
assumes allrisks associatedwith connectingthis generatorto ahome circuit.

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Note: specifications subject to change without prior notice.
11.SPECIFICATIONS
- 13 -
Package(LxWxH)(in)
Net weight(Ibs)
Model
Type
Rated voltage(V)
Rated frequency(Hz)
Rated current(A)
Rated power(kW)
Surge power(kW)
Power factor(cos( ))
DC rated voltage(V)
DC rated current(A)
Safety device
Engine
Type
Displacement (CC)
Start mode
Operation time(hr)
lgnition system
Fuel type
Oil type
27.16 21.26 22.05(690 540 560mm)
156.5(71kg)
GG7500N
Single phase, AVR
120/240
60
50/25
6.0
7.5
1.0
12
10
N.F.B
JF182FPH-2
Air-cppled single cylinder.
4-stroke engine
338
Recoil start
9
TCI
Unleaded gasoline
SAE 10W-30/SAE10W-40

13.1 CRANKCASEASSY
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1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
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22
23
NO. PARTS NO. DESCRIPTION QTY
QJ182QDP.01-11
157.5-10
157.5-9
QJ150FMG.5-8
GB5787-86
QJ182QDP.01.04
157-1-6-13
QJ182QDP.01-01
QJ168QDJ.01-05
QJ168QDJ.01-03
GB5787-86
QJ182QDP.01.01
QJ168QDJ.01-04
QJ182QDP.01-03
GB/T276-94
GB/T276-94
QJ182QDP.01-10
QJ182QDP.01-05
QJ182QDP.01-09
QJ182QDP.01-08
GB5787-86
QJ182QDP.01.03
QJ182QDP.01.02
Buse, locating
SPACER, drain
BOLT, drain
DOWEL PIN
BOLT M6 12
Sensor Assy, Fuel level
NUT
COVER, CRANKCASE
SEAL WASHER
PLUG, ADD OIL
BOLT M8 40
OIL SEAL 52 34 8
OIL LEVEL STICK
SPACER, CRANKCASE
Bearing6202 15 35 11
Bearing6207 35 72 17
Pin
ELECTRONIC SWITCH
CLIP, Cord
SEAL GASKET, rubber
BOLT M6 25
OIL SEAL
CRANKCASE ASSY
2
2
2
2
4
1
1
1
2
1
7
2
1
1
2
1
1
1
1
1
2
1
1
12.WHEEL KIT
13.PARTS LIST ANDDIAGRAM
- 14 -
1.Install the twowheels on the
generator using twobolts .
2.Install the crutcheson the underframe.
2.Install the handrailson the right frame.
CRUTCHES
WHEELS HANDRAILS
BOLTS

13.2 CYLINDERHEADASSY
NO. PARTS NO. DESCRIPTION QTY
QJ182QDP.02.01
QJ182QDP.02-01
QJ182QDP.02.02
QJ182QDP.02-03
QJ182QDP.02-04
QJ182QDP.02-02
QJ182QDP.02.03
QJ182QDP.02-05
QJ182QDP.02-06
GB5787-88
QJ182QDP.02-07
QJ182QDP.02.04
QJ182QDP.02.02-02
QJ182QDP.02.01-05
QJ182QDP.02.01-03
QJ182QDP.02.01-04
QJ182QDP.02.01-04
GB/T6177-2000
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Cylinder HeadAssy
Bolt, CylinderHead
Cover Assy
Spacer,Seal
Clamp
Bolt
Spacer Assy
Bolt, IntakePipe
Cowling
Bolt M6 12
Spacer,Intake Pipe
Spark Plug(NGK-BPR6ES)
Washer
Canal, Intake Valve
Canal, Exhaust Valve
Ring, Exhaust Valve
Ring, Intake Valve
Nut M6
1
4
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
2
- 15 -
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13.3 CAMSHAFT ASSY
13.4 CRANKSHAFT ASSY
- 16 -
QTY
1
1
2
1
1
2
2
2
2
1
2
1
1
2
1
1
1
1
2
1
1
1
1
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
NO. PARTS NO. DESCRIPTION
QJ182QDP.03-12
QJ182QDP.03-11
QJ182QDP.03-05
QJ182QDP.03-08
QJ182QDP.03-09
QJ182QDP.03-04
QJ182QDP.03-06
QJ182QDP.03-07
QJ182QDP.03-11
QJ182QDP.03-10
QJ182QDP.03.02
QJ182QDP.03-03
QJ182QDP.03-13
QJ182QDP.03-01
QJ182QDP.03.01-06
QJ182QDP.03.01-02
QJ182QDP.03.01.01-01
QJ182QDP.03.01.01-02
QJ182QDP.03.01.01-03
QJ182QDP.03.01-03
QJ182QDP.03.01-01
QJ182QDP.03.01-04
QJ182QDP.03.01-05
QJ182QDP.03.01
Exhaust valve
Lower retainer
Valve spring
Exhaust valve spring retainer
Valve rotator
Pivot bolt
Valve rockerarm
Rocker arm pivot
Pivot adjusting nut
Intake valve spring retainer
Push rod
Push rod guide plate
Intake valve
Valve lifter
Spring
Pin
Fly clump
Fly clump
Pin
Pin
Camshaft
Decompress clump
Pin
Camshaft comp.
1
2
3
4
5
6
7
QJ182QDP.04-01
QJ182QDP.04-02
QJ182QDP.04-03
QJ182QDP.04-04
QJ182QDP.04-05
QJ182QDP.04-06
GB/T276-94
BALANCE SHAFT
NUT
WOODRUFF KEY
CRANKSHAFT(1-type)
CRANKSHAFT GEAR
CRANKSHAFT GEAR
Bearing6207
NO. PARTS NO. DESCRIPTION QTY
1
1
1
1
1
1
1