Engine Control - BOMBARDIER Johnson 90 Service Manual

ENGINE CONTROL SYSTEM
ENGINE CONTROL - 140
ENGINE CONTROL-140
The specifications of engine control system such as ignition and fuel injection systems on model
140
are
basically the same as those on 90/115.
However, the control specifications on
140
differ from
90/115
as shown below.
ldling/Trolling speed
ldling/Trolling engine speed as controlled by IAC system:
• ldling/Trolling engine speed:
700
±
50·
rpm
• IAC duty ratio (at idling/trolling): Approximately 30%
NOTE:
To adjust idlingltrolling engine speed manual/y on 140. use the same procedure as 90/115 and adjust the
speed to 700 ± 50 rpm with the IAC va/ve duty set to 30%.
lgnltlon timing
The ignition timing is controlled within the following range according to the engine operating condition.
• lgnition timing advance ranga:
• lgnition timing (at idling/trolling):
BTDC
5º-45º
BTDC
10º
±
5º
Over revolution limiter
The over-rev detecting speed is as follows:
• 140: 6500
rpm
3-47