Suzuki DF 50 Service Manual

ENGINE CONTROL SYSTEM 3-4
COMPONENTS FOR SYSTEM CONTROL
ENGINE CONTROL MODULE (ECM)
The ECM sends signals to control the actuators based on the information inputs from each sensor / switch.
Major controls are as follows:
NAME OF CONTROL DESCRIPTION
Fuel injection control
NOTE:
The information related to the Caution system, Self-Diagnostic System, Operating hour indication system
and O
2
feedback system are retained in ECM memory.
• Controls fuel injection amount and timing.
Ignition control • Controls ignition timing.
Idle air control
• Controls idling/trolling speed by adjusting intake air amount through IAC
valve.
Fuel pump control • Controls high pressure fuel pump drive.
Caution system control
• Informs operator of abnormal engine condition.
• Controls engine speed.
Self-diagnostic system
control
• Informs operator of sensor / switch malfunction.
Fail-safe system control • Allows operation during sensor/ switch malfunction.
Operating hour indication
system control
• Informs operator of total operating time in units of 50 hours.
Start-in-gear
protection system control
• Prevents engine start when shift is positioned in forward or reverse.
O
2
feedback system
control
• Controls and performs O
2
feedback operation using optional O
2
sensor.

Suzuki DF 50 Specifications

General

Engine Type	4-Stroke
Cylinders	3
Displacement	941 cc
Starting System	Electric
Steering	Remote
Engine Type Detail	DOHC 12-Valve
Maximum Output	50 HP
Ignition System	Digital CDI
Alternator	12V 19A
Gear Ratio	2.27:1
Exhaust	Through Prop Hub Exhaust
Trim Method	Power Trim and Tilt
Max Power	50 HP
Alternator Output	12V 19A
Fuel Delivery System	Sequential Multi Point Electronic Fuel Injection
Full Throttle Operating Range	5, 300 - 6, 300 rpm
Engine Oil Capacity	2.7 L
Full Throttle RPM Range	5300 - 6300 RPM
Oil Capacity	2.7 L
Bore x Stroke	72.5 x 76.0 mm (2.85 x 2.99 in.)