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THEORY OF OPERATION
E-2 E-2
OUTBACK® 185
ENGINE STARTING, PROTECTION
AND BATTERY CHARGING
ENGINE STARTING
A 12 Volt battery supplies power to the rotary
run/stop/idle switch through a fuse that is located
inside the control box. There is also a lead running
from the fuse to the PC board. This is for battery
charging only.
When the switch is placed in the “Low Idle” or “High
Idle” position, a relay on the PC board is activated.
This relay activates the engine ignition system by
opening a ground lead from the engine magneto.
When the switch is held in the “Start” position, the
starter motor solenoid is activated, cranking the
engine. After the engine starts, the switch is released
and returns to the “high idle” position.
FIGURE E.2 - ENGINE STARTING, PROTECTION AND BATTERY CHARGING
If the battery is too low to properly power the starter
motor, the built-in recoil starter can be used to crank
the engine. (As long as the battery can produce 6 volts
or more, the engine ignition system will remain
enabled.)
NOTE: This machine will only start if there is at least 6
volts available to activate the engine ignition system. If
the battery is removed or completely dead, the engine
will not start.
ENGINE PROTECTION
The Kohler engine has a built-in oil level sensor that is
connected to an oil level module. If the oil level is low,
the ignition magneto is disabled. This will prevent the
engine from starting, or shut it down. Low oil level will
also cause a warning light on the Outback®’s control
panel to flicker for a few seconds when cranking the
engine.
NOTE: Unshaded areas of Block Logic
Diagram are the subject of discussion
+
CB1
CB3
CB2
CB4
__
++
_
+
240 VAC
RECEPTACLE
ENGINE
OIL
LEVEL
MODULE
(KOHLER)
OIL LEVEL
INDICATOR
OIL LEVEL
SWITCH
IGNITION
STATOR
ROTOR
OFF
AUTO
HIGH
START
ALTERNATOR
IDLE
SOLENOID
SLIP
RINGS
AUXIIARY WINDINGS
WELD
WINDINGS
REACTOR
EXCITER
WINDING
CURRENT
SENSOR
120 VAC RECEPTACLES
BOOST
WINDING
OUTPUT
RECTIFIER
(2 PHASE)
CHOKE
OUTPUT
STUDS
BATTERY
ENGINE
SHUTDOWN
RELAY
HOUR
METER
FIELD / CONTROL PC BOARD
AUTOMATIC
IDLER
CIRCUIT
OUTPUT
CONTROL CIRCUIT
OUTPUT
CONTROL
10 AMP
FUSE
STARTER /
SOLENOID
BRUSHES
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