Ignition And Ignition Control System; Checking The Ignition Spark; Checking The Ignition Coil Input Voltage; Checking The Crank Position Sensor - SELVA MARINE Blue Whale 250 EFI Service Manual

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Ignition and ignition control
system

Checking the ignition spark

1. Remove the ECM cover.
2. Remove the ignition coils.
3. Connect a ignition coil assembly to the
special service tool.
Ignition tester: 90890-06754
4. Crank the engine and check the spark. If
the spark is weak, check the ignition sys-
tem.
WARNING
• Do not touch any of the connections of
the spark checker leads.
• Be sure to install the special service tool
to the ignition coil so that sparks do not
leak out.
• Keep flammable gas or liquids away,
since this test can produce sparks.
8-15
Electrical system
S6P28050
S6P28060
NOTE:
The ignition spark can also be checked using
8
the "Stationary test" of the YDIS.
Checking the ignition coil input
voltage
1. Disconnect the ignition coil coupler.
2. Turn the engine start switch to ON.
3. Measure the voltage at the ignition coil
coupler. Check the wiring harness if
below specification.
2
4
6
Ignition coil input voltage:
Red/yellow (R/Y) – Black (B)
12 V (battery voltage)

Checking the crank position sensor

1. Remove the flywheel magnet cover.
2. Disconnect the crank position sensor
coupler.
3. Connect the test harness (2 pins) to the
crank position sensor and measure the
crank position sensor out put peak volt-
age.
4. Check the crank position sensor air gap
and projection of the flywheel magnet if
below specification.
1
3
5
S6P28605E
6P23H11