2-32
Yamaha Generator Theory & Diagnostics Guide
6-5
ENGINE
TRBL
ENGINE SPEED IS UNEVEN
Check fuel level.
SUFFICIENT
INSUFFICIENT
Add.
Check if fuel is deteriorated.
GOOD
NO GOOD
Replace fuel.
Check if fuel tank cap is clogged.
GOOD
NO GOOD
Replace.
Check if fuel cock is clogged.
GOOD
NO GOOD
Clean.
Check fuel pump operation.
GOOD
NO GOOD
Replace.
Check spark plug for dirt and check spark plug gap.
GOOD
NO GOOD
Clean, adjust or replace.
While the engine is operating, pull the choke knob
approximately 1/3 to 1/2 way out, and then check the
engine operating condition.
STABLE
UNSTABLE
Resurface or replace.
Check for air suction due to a damaged throttle shaft
seal, carburetor joint, or gasket.
GOOD
NO GOOD
Disassemble or replace.
Check if slow or main passages such as, the pilot jet
and main jet, in carburetor are clogged.
GOOD
NO GOOD
Disassemble or clean.
Check valve face and valve seat for wear.
GOOD
NO GOOD
Resurface or replace.
Check if there is seizure or wear on piston, piston ring,
or cylinder.
GOOD
SEIZURE OR
WEAR
Rebore or replace.
Check the condition of the throttle control system.
Refer to “THROTTLE CONTROL SYSTEM”.
Check valve clearance.
GOOD
OUT OF SPECIFICATION
Adjust.
7VV10-06 02.10.4 10:41 AM Page 5
Check the condition of the throttle control system.
Refer to “THROTTLE CONTROL SYSTEM” in
Model Service Manual.
Summary of Contents for EF4500iSE - Inverter Generator
Page 1: ...YAMAHA GENERATOR THEORY DIAGNOSTICS GUIDE...
Page 4: ......
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...