Generac Power Systems 4000EXL Owner's Manual page 10

• DO NOT OVERLOAD THE GENERATOR. See
"Don't Overload Generator".
Stopping the Engine
1. Turn OFF and unplug ALL electrical loads from
generator panel receptacles. NEVER start or stop engine
with electrical devices plugged in and turned ON.
2. Move idle control switch to "Off" position.
3. Let engine run at no-load for several minutes to
stabilize internal temperatures of engine and generator.
4. Turn engine off according to instructions given in the
engine owner's manual.
5. Move fuel valve to "Off" position.
Operating Automatic Idle Control
This switch is designed to greatly improve fuel economy.
When this switch is turned ON, the engine will only
run at its normal high governed engine speed when
electrical loads are connected.When an electrical load is
removed, the engine will run at a reduced speed.
With the switch off, the engine will run at the normal
high engine speed. Always have the switch off when
starting and stopping the engine.
Charging a Battery
Your generator has the capability of recharging a discharged
12 Volt automotive or utility style storage battery. DO NOT
use the unit to charge any 6 Volt batteries. DO NOT use the
unit to crank an engine having a discharged battery.
DANGER
Storage batteries give off explosive hydrogen gas
during recharging.
Hydrogen gas stays near battery for a long time
after battery has been charged.
Slightest spark will ignite hydrogen and cause
explosion.
You can be blinded or severely injured.
Battery electrolyte fluid contains acid and is
extremely caustic.
Contact with battery fluid will cause severe
chemical burns.
• DO NOT allow any open flame, spark, heat, or lit cigarette
during and for several minutes after charging a battery.
• Wear protective goggles, rubber apron, and rubber gloves.
4000EXL Extended Life Generator
To recharge 12 Volt batteries, proceed as follows:
1. Check fluid level in all battery cells. If necessary, add
ONLY distilled water to cover separators in battery
cells. DO NOT use tap water.
2. If battery is equipped with vent caps, make sure they
are installed and are tight.
3. If necessary, clean battery terminals.
4. Connect battery charge cable connector plug to panel
receptacle identified by the words "12-VOLTS D.C.".
5. Connect battery charge cable clamp with red handle
to the positive (+) battery terminal (Figure 7).
Figure 7 — Battery Connections
6. Connect battery charge cable clamp with black handle
to the negative (–) battery terminal (Figure 7).
7. Start engine. Let engine run while battery recharges.
8. When battery has charged, shut down engine
NOTE: Use an automotive hydrometer to test battery state
of charge and condition. Follow the hydrometer
manufacturer's instructions carefully. Generally, a battery is
considered to be at 100% state of charge when specific gravity
of its fluid (as measured by hydrometer) is 1.260 or higher.
How to Use the Battery Charger
Use battery float charger jack to keep the starting battery
charged and ready for use. Battery charging should be done
in a dry location, such as inside a garage.
1. Plug charger into unit's "Battery Float Charger" jack,
which is located on the starter switch (Figure 8). Plug
battery charger into a 120 Volt AC wall receptacle.
Figure 8 — Battery Charger Jack
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