Ignition Timing Control System - SELVA MARINE Blue Whale 250 EFI Service Manual

GEN
INFO

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
Description
Ignition timing
Power supply timing
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.
1-25
General information
Stops ignition.
Simultaneous ignition for cylinder groups #1
and #4, #2 and #5, and #3 and #6.
Sequential ignition in order of cylinders #1,
#2, #3, #4, #5, and #6.
Controls the power supply timing to the igni-
tion coils.
Control Engine condition
Turned off
Cranking and starting
Normal operation
Normal operation
6P23H11