Suzuki DF200 Service Manual

ENGINE CONTROL SYSTEM 3-17
IGNITION SYSTEM
The ignition system used by the DF200/DF225/DF250 is a fully transistorized, electronic microcomputer tim-
ing advanced type.
This system is totally battery powered, with the ECM controlling all ignition timing functions.
The ignition system is composed of the ignition coil, spark plug and components for system control (ECM,
sensor, switch etc.)
When the ignition switch is “ON”, battery voltage (12 V) is applied to the circuit as shown in the illustration.
The ECM determines the optimum ignition timing and duration of current flowing through the ignition coil pri-
mary winding based on the signals received from various sensors. The ECM interrupts the base current of
the power transistor inside the ignition coil thereby controling current flow (ignition) to the primary winding of
ignition coil.
In this way, a mutual induction high voltage occurs in the ignition coil secondary side and spark is generated.
+12 V
Ign.2
+12 V
Ign.1
Spark
plug
+12 V
Ign.4
Spark
plug
+12 V
Ign.6
Spark
plug
Spark
plug
+12 V
Ign.3
Spark
plug
+12 V
Ign.5
Spark
plug
ECM
O
Bl
Gr/Y
Lg/R
W/G
Bl/Y
IGT1
IGT2
IGT3
IGT4
IGT5
IGT6
42
50
39
45
37
38
Ignition coil
GND
+BAT
IGT

Suzuki DF200 Specifications

General

Brand	Suzuki
Model	DF200
Category	Outboard Motor
Language	English