SELVA MARINE Blue Whale 250 EFI, Service Manual

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GEN
INFO
General information
1-25
6P23H11
Ignition timing control system
In the Blue Wlale 250 engine, the ignition timing control system controls the ignition timing and the
power supply timing to the ignition coils.
Maximum output, low fuel consumption, and low emissions are achieved by securing the optimum
ignition timing under various engine operating conditions.
Ignition timing control
Ignition timing when cranking and starting the engine
When the engine is cranked and started, the spark plug ignites at BTDC 10
° .
Ignition at normal operation
During normal operation, map control is performed according to the engine speed, the intake air
pressure, and the octane value of the fuel. The power supply timing to the ignition coils is controlled
by the battery voltage.
Description Control Engine condition
Ignition timing Stops ignition. Turned off
Simultaneous ignition for cylinder groups #1
and #4, #2 and #5, and #3 and #6. Cranking and starting
Sequential ignition in order of cylinders #1,
#2, #3, #4, #5, and #6. Normal operation
Power supply timing Controls the power supply timing to the igni-
tion coils. Normal operation