Engine Control System - Suzuki DF 90 Service Manual

DF140 "K2" ('02) MODEL 11-17

ENGINE CONTROL SYSTEM

The specifications of engine control system such as ignition
and fuel injection systems on model DF140 are basically the
same as those on DF90/115.
However, the control specifications on DF140 differ from DF90/
115 as shown below.
IDLING/TROLLING SPEED
Idling/Trolling engine speed as controlled by IAC system:
• Idling/Trolling engine speed: 700 ± 50 r/min
• IAC duty ratio (at idling/trolling): Approximately 30%
NOTE:
To adjust idling/trolling engine speed manually on DF140, use
the same procedure as DF90/115 and adjust the speed to 700
± 50 rpm with the IAC valve duty set to 30%.
IGNITION TIMING
The ignition timing is controlled within the following range ac-
cording to the engine operating condition.
• Ignition timing advance range: BTDC 5° – 45°
• Ignition timing (at idling/trolling): BTDC 10° ± 5°
OVER REVOLUTION LIMITER
The over-rev detecting speed is as follows:
• DF140: 6500 rpm
SUZUKI DIAGNOSTIC SYSTEM
The database specially provided for DF140 needs to be
added to the program ver. 4 currently used.
FLYWHEEL MAGNETO
When installing the flywheel magneto, apply a small amount of
engine oil to the threads and seating face of the magneto bolt
for lubrication so that the correct tightening torque specifica-
tion can be attained securely.
Flywheel bolt : 245 N . m (24.5 kg-m, 177 lb-ft)