Suzuki DF250SS manual DF250S Product, Suzuki’s Advanced Electronics Optimize Performance

Plug Top Ignition Coil

DF250S PRODUCT INFORMATION

DF250S PRODUCT

Suzuki’s Advanced Electronics Optimize Performance

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. ￿is comprehensive network of sensors includes the Manifold Absolute Pressure Sensor, Cranksha! Position Sensor, Intake Air Tempera- ture Sensor, Cylinder Wall Temperature Sensor, Camsha! 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 e"ciency.

Regulator with Dual Circuit Charging System

￿e 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.

	Regulator	SINGLE CHARGING SYSTEM
		Engine
		Load
Magneto		Fuse Box
		Main
		Battery
	Regulator

Regulator

DUAL CHARGING SYSTEM

Engine

Load

Magneto	Fuse Box	Main
	Auxiliary
	Battery	Battery

Regulator

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. ￿e 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.

High Output Alternator

￿e 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.

(A)

55

50

45

40

35

30

25

20

15

10

5

0 1000 2000 3000 4000 5000 (rpm)

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