Onan HGJAB Service Manual

9-15
DIMENSIONS AND CLEARANCES
ITEM
STANDARD
inches (mm)
MAXIMUM
inches (mm)
Cylinder Head
Flatness
0.002 or less
(0.05 or less)
0.004 (0.1)
Valve seat contact
width
Intake/
Exhaust
0.028 – 0.039
(0.7 – 1.0)
0.079 (2.0)
Valve guide inside
diameter
0.2376 – 0.2383
(6.035 – 6.053)
0.242 (6.15)
Cylinder
Inside diameter
ÇÇ
ÇÇ
STD
3.1496 – 3.1504
(80.000 – 80.019
Rebore when the
difference between
the max. and min. of
diameter reaches
0.004 (0.1)
ÇÇ
ÇÇ
ÇÇ
ÇÇ
ÇÇ
ÇÇ
ÇÇ
ÇÇ
ÇÇ
ÇÇ
1st
Reboring
3.159 – 3.160
(80.250 – 80.269)
3.159 – 3.160
(80.250 – 80.269)
ÇÇÇ
ÇÇÇ
ÇÇÇ
ÇÇÇ
ÇÇ
ÇÇ
ÇÇ
ÇÇ
2nd
Reboring
3.169 – 3.170
(80.500 – 80.519)
––––––––
Roundness after reboring
0.004 (0.01) ––––––––
Cylindricity after reboring 0.0006 (0.015) ––––––––

Onan HGJAB Specifications

General

Fuel Type	Gasoline
Power Output	5500 Watts
Voltage	120/240V
Starting	Electric
Engine Type	OHV
Noise Level	68 dB
Outlet Types	1 x 120/240V 30A Locking