GX240 • GX270 • GX340 • GX390 (UT2/RT2) Technical Manual
© 2010 American Honda Motor Co., Inc — All Rights Reserved 11
Engine Acceleration/Vibration
Using a vibration meter, measure the vibration amplitude at the base
on three axis (vertical, lateral and horizontal).
ELECTRICAL SYSTEM
Battery
Use a 12 V battery with a minimum capacity of 24AH.
Fuse
Recommended fuse size:
Battery Cables
Select battery cables to avoid greater than 0.5 volt drop in the cable during starter motor operation.
Battery cable size and length: (Gauge x Length)
Positive cable: AWG No. 4 x 1.5 m (5.0 ft) maximum
Negative cable: AWG No. 4 x 2.3 m (7.5 ft) maximum
Engine Switch
Electric start
Use a three-position engine switch with continuity between its terminals as shown.
* In combination with 1A/3A/10A charge coil, AV1.25 is acceptable.
AV0.5 = Automotive Vinyl, 0.5 mm
2
cross-sectional area
Do not run the starter motor for more than 5 seconds at a time. Always allow resting for 10 seconds before each
starting attempt.
Direction Allowable G value
(Peak) (RMS)
Vertical 10 (98 m/s
2
)6.9 (68 m/s
2
)
Horizontal 5.9 (58 m/s
2
)4.2 (41 m/s
2
)
Lateral 6.9 (68 m/s
2
)4.9 (48 m/s
2
)
Wire Color
EXT+
(Red)
EXT –
(Black)
ST
(Black/White)
BAT
(White)
Switch Position
OFF
ON {{
START {{{{
Vdc/A (rated) AC300V, 220mA (PEAK) 12/15A
Dia. (recommended) AV0.5 AV0.5 AV2.0* AV0.75
HORIZONTAL
VERTICAL
LATERAL
Charging system (A) Fuse (A)
1.0 5
3.0
15
10.0
18.0 25
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