1-26
Yamaha Generator Theory & Diagnostics Guide
Resistor and Non-Resistor Spark Plugs
Resistor type spark plugs are used in all Yamaha
generators. Do not use non-resistor type spark
plugs. Refer the Owner’s Manual or Service Manual
for complete information.
Neutral Ground and Floating Ground (Open
Ground – False )
Neutral Ground (also called “neutral bond”) means
earth ground and neutral are bonded together
(wired together). This creates less chance of electro-
cution by providing two paths for electricity to travel
in the event of a short.
Floating Ground means that earth ground and neu-
tral are NOT bonded together. All Yamaha Inverters
use a “floating ground” grounding method.
Devices that require a Neutral Ground (bonded neu-
tral) will not work correctly when plugged into a float-
ing ground generator - this is because the device
can not locate an earth ground presence.
Ground Fault Circuit Interrupter (GFCI)
A GFCI protected outlet interrupts power delivery
when a fault or short to ground is detected to pre-
vent electrocution. It is a device that interrupts the
power flowing through a GFCI receptacle when a
proper ground is not present or if/when a short
occurs. All Yamaha Industrial series generators (YG
models) are equipped with GFCI protected outlets.
ExTENSION CORD GUIDELINES
A proper extension cord must always be used. If a
cord is not heavy enough for the load it must carry,
it could burn or there could be a severe reduction in
power available at the end of the cord.
The following chart shows the minimum extension
cord wire size for the amount of the expected load.
Note that the wire size increases with the length of
the cord as the anticipated load increases. Light-
gauge cords can be easily damaged. Practical con-
siderations suggest that small-size cords (20 gauge
or smaller) be avoided.
ExTENSION CORD GAUGE
*LOAD
(AMPERES)
MINIMUM GAUGE (AWG)
0 ~ 50 Feet
50 ~ 100 Feet
100 ~ 150 Feet
2
22
20
18
3
22
18
16
4
20
16
16
5
18
16
14
6
18
16
14
8
16
14
12
10
16
12
12
12
16
12
10
14
14
12
10
16
14
10
10
18
14
10
8
20
12
10
8
22
12
10
8
25
12
10
8
30
10
8
6
35
10
8
6
40
8
6
4
50
6
4
2
60
4
2
2
Summary of Contents for EF4500iSE - Inverter Generator
Page 1: ...YAMAHA GENERATOR THEORY DIAGNOSTICS GUIDE...
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Page 34: ......
Page 50: ...2 16 Yamaha Generator Theory Diagnostics Guide...
Page 51: ...2 17 Generator Diagnostics...
Page 53: ...2 19 Inverter Generator Diagnostics...
Page 54: ...2 20 Yamaha Generator Theory Diagnostics Guide...
Page 76: ......
Page 101: ...3 25 Current Model Specifications and Wiring Diagrams EF2800i INVERTER GENERATOR EF2800i...
Page 102: ...3 26 Yamaha Generator Theory Diagnostics Guide EF2800i WIRING DIAGRAM...
Page 103: ...3 27 Current Model Specifications and Wiring Diagrams EF2800i 5W 30...
Page 104: ...3 28 Yamaha Generator Theory Diagnostics Guide...
Page 105: ...3 29 Current Model Specifications and Wiring Diagrams EF2800i...
Page 106: ...3 30 Yamaha Generator Theory Diagnostics Guide...
Page 107: ...3 31 Current Model Specifications and Wiring Diagrams EF2800i...
Page 108: ...3 32 Yamaha Generator Theory Diagnostics Guide...
Page 117: ...3 41 Current Model Specifications and Wiring Diagrams YG4000DE...
Page 118: ...3 42 Yamaha Generator Theory Diagnostics Guide INVERTER GENERATOR EF4000DE...
Page 119: ...3 43 Current Model Specifications and Wiring Diagrams YG4000DE 5W 30...
Page 120: ...3 44 Yamaha Generator Theory Diagnostics Guide...
Page 121: ...3 45 Current Model Specifications and Wiring Diagrams YG4000DE...
Page 122: ...3 46 Yamaha Generator Theory Diagnostics Guide...
Page 123: ...3 47 Current Model Specifications and Wiring Diagrams YG4000DE...
Page 124: ...3 48 Yamaha Generator Theory Diagnostics Guide...
Page 125: ...3 49 Current Model Specifications and Wiring Diagrams YG4000DE...
Page 126: ...3 50 Yamaha Generator Theory Diagnostics Guide INVERTER GENERATOR EF4500iSE...
Page 127: ...3 51 Current Model Specifications and Wiring Diagrams EF4500iSE EF4500iSE WIRING DIAGRAM...
Page 128: ...3 52 Yamaha Generator Theory Diagnostics Guide...
Page 129: ...3 53 Current Model Specifications and Wiring Diagrams EF4500iSE 5W 30...
Page 130: ...3 54 Yamaha Generator Theory Diagnostics Guide...
Page 131: ...3 55 Current Model Specifications and Wiring Diagrams EF4500iSE...
Page 132: ...3 56 Yamaha Generator Theory Diagnostics Guide...
Page 133: ...3 57 Current Model Specifications and Wiring Diagrams EF4500iSE...
Page 134: ...3 58 Yamaha Generator Theory Diagnostics Guide...
Page 135: ...3 59 Current Model Specifications and Wiring Diagrams EF4500iSE...
Page 136: ...3 60 Yamaha Generator Theory Diagnostics Guide...
Page 147: ...3 71 Current Model Specifications and Wiring Diagrams EF6300iSDE INVERTER GENERATOR EF6300iSDE...
Page 148: ...3 72 Yamaha Generator Theory Diagnostics Guide EF6300iSDE WIRING DIAGRAM...
Page 149: ...3 73 Current Model Specifications and Wiring Diagrams EF6300iSDE...
Page 150: ...3 74 Yamaha Generator Theory Diagnostics Guide...
Page 151: ...3 75 Current Model Specifications and Wiring Diagrams EF6300iSDE...
Page 152: ...3 76 Yamaha Generator Theory Diagnostics Guide...
Page 164: ...3 88 Yamaha Generator Theory Diagnostics Guide EF12000DE...
Page 165: ...3 89 Current Model Specifications and Wiring Diagrams EF12000DE EF12000DE...
Page 166: ...3 90 Yamaha Generator Theory Diagnostics Guide EF12000DE...
Page 167: ...3 91 Current Model Specifications and Wiring Diagrams EF12000DE EF12000DE...
Page 168: ...3 92 Yamaha Generator Theory Diagnostics Guide EF12000DE...
Page 169: ...3 93 Current Model Specifications and Wiring Diagrams EF12000DE EF12000DE...
Page 170: ...3 94 Yamaha Generator Theory Diagnostics Guide CONVENTIONAL GENERATOR EF12000DE Control Box...
Page 171: ...3 95 Current Model Specifications and Wiring Diagrams EF1200DE EF12000DE WIRING DIAGRAM...
Page 180: ...3 104 Yamaha Generator Theory Diagnostics Guide CONVENTIONAL GENERATOR YG4000D...
Page 181: ...3 105 Current Model Specifications and Wiring Diagrams YG4000D...
Page 182: ...3 106 Yamaha Generator Theory Diagnostics Guide YG4000D WIRING DIAGRAM...
Page 183: ...3 107 Current Model Specifications and Wiring Diagrams YG4000D...
Page 184: ...3 108 Yamaha Generator Theory Diagnostics Guide 5W 30...
Page 185: ...3 109 Current Model Specifications and Wiring Diagrams YG4000D...
Page 186: ...3 110 Yamaha Generator Theory Diagnostics Guide...
Page 187: ...3 111 Current Model Specifications and Wiring Diagrams YG4000D...
Page 188: ...3 112 Yamaha Generator Theory Diagnostics Guide...
Page 189: ...3 113 Current Model Specifications and Wiring Diagrams YG4000D...
Page 190: ...3 114 Yamaha Generator Theory Diagnostics Guide...
Page 218: ...2009 Yamaha Motor Corporation U S A Printed in U S A LIT BKTEC GN 01...
