SELVA MARINE Blue Whale 250 EFI, Service Manual

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Feature and benefit
1
ECM system
In the engine of the Blue Whale 250 , the ECM controls the fuel injection volume, ignition timing, intake
valve opening and closing timing, and the electronic throttle valve opening angle as well as the
engine speed when the engine overheats and when the engine oil pressure is low. Reliable starting,
stabilized trolling, excellent acceleration, maximum output, low fuel consumption, and low emissions
are achieved by maintaining the optimum air-fuel ration and ignition timing under various engine
conditions.
Electronic control module system diagram
S6P21110
:
:
:
High-pressure
fuel pump
Vapor
separator
tank
Low-
pressure
fuel pump
Oil control valve (PORT)
Cam position sensor
(PORT IN)
Cam position
sensor
(PORT EX)
Control
signal
Cam position
sensor (STBD IN)
Oil control valve (STBD)
Variable camshaft timing control
Fuel injection control
Ignition timing control
Air
Fuel
Vapor gas
Filter
Canister
Check
valve
Fuel
flow
Vapor
gas flow
Fuel filter
with water
separator
Vapor shut-off
valve
Air flow
Electronic throttle
valve assembly
TPS and
Electronic throttle
valve motor
Accelerator position sensor
Electronic throttle valve control
Battery
ECM
Crank position sensor
Intake air pressure sensor
Oil pressure sensor
Engine temperature sensor
Intake air temperature sensor
Knock sensor
Shift cut switch
Neutral switch
Fuel injector
Special service tool / Feature and benefit