55
Electrical System
66 690 14 Rev. A
KohlerEngines.com
BATTERY CHARGING SYSTEM
CAUTION
Electrical Shock can cause injury.
Do not touch wires while engine is running.
NOTE: Observe following guidelines to avoid damage to
electrical system and components:
●
Make sure battery polarity is correct. A negative (–)
ground system is used.
●
Disconnect recti
fi
er-regulator plug, electronic control
unit (ECU), and/or wiring harness plug before doing
any electric welding on equipment powered by engine.
Also, disconnect all other electrical accessories in
common ground with engine.
●
Prevent stator (AC) leads from touching or shorting
while engine is running. This could damage stator.
These engines are equipped with a 25 amp regulated
charging system.
25 Amp Regulated Charging System
C
E
F
D
B
A
A
Battery
B
Starter
C
Fuse
D
Recti
fi
er-Regulator
E
Connector Block
F
Flywheel Stator
Assembly
Stator
Stator is mounted on crankcase behind
fl
ywheel. Follow
procedures in Disassembly/Inspection and Service and
Reassembly if stator replacement is necessary.
Recti
fi
er-Regulator
Recti
fi
er-regulator is mounted on air cleaner bracket. To
replace, disconnect plug(s), remove mounting screws,
and ground wire.
Battery
A 12-volt battery with 400 cold cranking amps (cca) is
generally recommended for starting in all conditions. A
smaller capacity battery is often su
ffi
cient if an
application is started only in warmer temperatures. Refer
to following table for minimum capacities based on
anticipated ambient temperatures. Actual cold cranking
requirement depends on engine size, application, and
starting temperatures. Cranking requirements increase
as temperatures decrease and battery capacity shrinks.
Refer to equipment's operating instructions for speci
fi
c
battery requirements.
Battery Size Recommendations
Temperature
Battery Required
Above 32°F (0°C)
300 cca minimum
0°F to 32°F (-18°C to 0°C)
300 cca minimum
-5°F to 0°F (-21°C to -18°C)
300 cca minimum
-10°F (-23°C) or below
400 cca minimum
If battery charge is insu
ffi
cient to turn over engine,
recharge battery.
Battery Maintenance
Regular maintenance is necessary to prolong battery
life.
Battery Test
To test battery, follow manufacturer's instructions.
