Yamaha EF4500iSE Theory & Diagnostics Manual page 204

Yamaha Generator Theory & Diagnostics Guide
MAINTENANCE SPECIFICATIONS
ENGINE
Piston:
Piston clearance
<Limit>
Piston skirt "D"
<Limit>
Measuring point "H"
Oversize
Piston pin hole inside diameter
<Limit>
Piston pin:
Piston pin diameter
<Limit>
Piston ring:
Top ring
Type
Dimensions "B × T"
End gap
<Limit>
Side clearance
<Limit>
2nd ring
Type
Dimensions "B × T"
End gap
<Limit>
Side clearance
<Limit>
Oil ring
Type
Dimensions "B × T"
End gap
<Limit>
MAINTENANCE SPECIFICATIONS
Unit
mm (in)
1st
2nd
mm (in)
mm (in)
B
T
EF6600DE YG6600D
0.015 ~ 0.029 (0.0006 ~ 0.0011)
0.100 (0.0039)
84.977 ~ 84.998 (3.3456 ~ 3.3464)
84.900 (3.3425)
10.0 (0.4)
85.25 (3.3563)
85.50 (3.3661)
20.000 (0.7874)
20.020 (0.7882)
19.995 ~ 20.000 (0.7872 ~ 0.7874)
19.950 (0.7854)
Barrel face
1.5 × 3.6 (0.059 × 0.142)
0.20 ~ 0.35 (0.008 ~ 0.014)
0.9 (0.035)
0.04 ~ 0.08 (0.0016 ~ 0.0031)
0.1 (0.0039)
Taper
1.5 × 3.6 (0.059 × 0.142)
0.20 ~ 0.35 (0.008 ~ 0.014)
0.9 (0.035)
0.03 ~ 0.07 (0.0012 ~ 0.0028)
0.1 (0.0039)
3-piece type
3.0 × 3.0 (0.118 × 0.118)
0.20 ~ 0.70 (0.008 ~ 0.028)
0.9 (0.035)
3-128
22
SPEC
YG6600DE