Yamaha EF2000iS - Inverter Generator, Service Manual

Page: 258 / 312

7-3
SPEC
MAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
ENGINE
Piston: mm (in)
Piston clearance 0.015 – 0.040 (0.0006 – 0.0016)
<Limit> 0.1 (0.0039)
Piston skirt “D” 48.574 – 48.594 (1.9123 – 1.9131)
<Limit> 48.53 (1.911)
Measuring point “H” 10.0 (0.4)
Oversize 1st 48.85 (1.9232)
2nd 49.10 (1.9331)
Piston pin hole inside diameter 12.004 – 12.015 (0.4725 – 0.4730)
<Limit> 12.05 (0.4744)
Piston pin: mm (in)
Piston pin diameter 11.996 – 12.000 (0.4723 – 0.4724)
<Limit> 11.950 (0.4705)
Piston ring: mm (in)
Top ring
Type Barrel face
Dimensions “B
×
T” 1.5
×
2.0 (0.059
×
0.079)
End gap 0.20 – 0.40 (0.008 – 0.016)
<Limit> 0.6 (0.0236)
Side clearance 0.04 – 0.08 (0.0016 – 0.0031)
<Limit> 0.12 (0.0236)
2nd ring
Type Taper
Dimensions “B
×
T” 1.5
×
2.0 (0.059
×
0.079)
End gap 0.20 – 0.40 (0.008 – 0.016)
<Limit> 0.6 (0.0236)
Side clearance 0.02 – 0.06 (0.0008 – 0.0023)
<Limit> 0.1 (0.0039)
Oil ring
Type 3-piece type
Dimensions “B
×
T” 2.5
×
2.5 (0.098
×
0.098)
End gap 0.20 – 0.70 (0.008 – 0.028)
<Limit> 0.9 (0.0354)
B
T
7DK40-07 6/15/09 3:01 PM Page 3