Honda G100K2 Applications Manual page 32

Allowable G value for GX(V) / GC(V) engines
Engine
GX 120 – 390
longitudinal
GX 100 standard
longitudinal
GX 100 tamper type
GXH 50 GXV 50 – 390
GX(V) 610 / 620 / 670
GCV 520/530 GXV 520/530
GC 135/160 GCV 135/160
Allowable G value for M4 engine: GX22 / GX25 / GX31
Vibration acceleration G (RMS value) in three directions at each engine speed must be below the following values.
Example: At an altitude of 1500 meters, use a jet size correction factor of 85%. If the standard main jet is # 68,
The recommended jet for an altitude of 2000 meters would be # 65 (68-3 = 65).
For quick reference, the size of a jet can be easily found through the part number.
For example: 99101-ZF5-0850
99101-ZF5-0800
99101-ZF5-0820
Note:
At an altitude of 1500 meters, a correctly jetted engine is capable of delivering approximately 85% of its sea
level maximum power.
For continuous loads, the engine should not be required to deliver more than 85% of its sea level maximum
power.
GX 22
RPM Z - axis Y - axis
5000 2.5 2.0
8000 4.0 3.5
10000 6.5 5.0
Vibration analysis and visualization
A useful tool for solving vibration problems is a stroboscope.
This instrument connected to the ignition system of the engine causes
the motion of elements vibrating at the same frequency of the ignition to
become optically frozen.
Therefore this instrument can be of great assistance when placing
stiffening members on the equipment.
direction Allowable G value: EQ Peak
vertical
lateral
vertical
lateral
GX 22
jet # 85
jet # 80
jet # 82
X - axis RPM Z - axis
1.5 5000 2.5
2.0 8000 6.0
2.5 10000 10
Allowable G value: RMS
10
6
7
5
3.5
5
50
5
5
5
7
GX 31
GX 31
Y - axis X - axis RPM
2.5 2.0 5000
4.0 2.5 8000
6.5 3.0 10000
- 31 -
VIBRATION
7.1
4.3
4.9
3.5
2.5
3.5
35
3.5
3.5
3.5
5
GX 25 / 35
Z - axis Y - axis X - axis
2.5 / 3.5 2.5 / 2.5 2.0 / 2.0
6.0 / 6.0 4.0 / 6.5 2.5 / 3.5
10 / 13.5 6.5 / 10 4.0 / 7.0