Suzuki DF250SS - Manual (Page 9)

8
Plug Top
Ignition Coil
Direct Ignition System
Supplying spark to the DF250SS is an advanced ignition system
that utilizes integral type spark plug caps with built-in ignition
coils. The system is controlled by the outboard’s powerful 32-bit
computer and provides each cylinder with optimum spark timing.
In addition to reducing the number of
parts and simplifying the wiring
system, this arrangement greatly
reduces electronic engine “noise” that
can interfere with VHF radios, fish
finders, and other marine electronics.
DF250S PRODUCT
G Suzuki’s Advanced Electronics Optimize Performance
L
Regulator with Dual Circuit Charging System
The DF250SS features a built in dual circuit charging system
that can be adapted* for use with dual-battery configurations.
When used in this configuration, the system charges both main and
auxiliary batteries simultaneously on independent circuits. With
this design, you can drain down the accessory battery powering
your electronics and still have a fully charged main battery for
starting the motor.
* Requires purchase of optional wiring harness.
SINGLE CHARGING SYSTEM
DUAL CHARGING SYSTEM
High Output Alternator
The DF250SS generates electricity from a high output alternator
that delivers 54A (12V) of electrical power. Suzuki’s design allows
the alternator to produce a majority of its output at low rpm, so
even when operating at 1000rpm it can produce approximately
38A of power. In most situations, this is enough power to keep an
assortment of electronics up and running.
0
5
10
15
20
25
30
35
40
45
50
55
1000 2000 3000 4000 5000 (rpm)
(A)
Magneto
Regulator
Regulator
Fuse Box
Main
Battery
Engine
Load
Magneto
Regulator
Regulator
Fuse Box
Auxiliary
Battery
Main
Battery
Engine
Load
DF250S PRODUCT INFORMATION
A
32-Bit ECM and Suzuki’s Multi Point Sequen-
tial Electronic Fuel Injection
Suzuki pioneered the use of multi point sequential electronic
fuel injection in four-stroke outboards with the introduction of the
DF60 and DF70–the first four-stroke outboards designed with
multi point sequential electronic fuel injection. At the heart of the
DF250SS is a multi point sequential fuel injection system which is
operated by an ECM (Engine Control Module) using a series of
engine sensors to constantly monitor crucial data, in real time. This
comprehensive network of sensors includes the Manifold Absolute
Pressure Sensor, Crankshaft Position Sensor, Intake Air Tempera-
ture Sensor, Cylinder Wall Temperature Sensor, Camshaft Position
Sensor, and Exhaust Jacket Temperature Sensor. Using a powerful
32-bit computer, the ECM processes data from all of these sensors
and instantly calculates the optimum amount of fuel to be injected
at high pressure into each cylinder.
Benefits of this system include reduced
exhaust emissions, which allow the
DF250SS to comply with CARB 3-Star
emission requirements, lower fuel
consumption, smoother starts, crisper
acceleration, impressive performance,
and maximum efficiency.