BRP E250DHLSCS, Service Manual

Page: 120 / 396

118
SYSTEM ANALYSIS
IGNITION OUTPUT TESTS
Results:
No spark on one or more cylinders:
•
Inspect or replace spark plugs
•
Repeat static test on primary circuit.
Connect timing light pickup to the primary circuit
of the cylinder being tested. Activate test and
observe timing light strobe for consistent flash.
No spark control on one or more cylinders:
•
Refer to
Ignition Primary Circuit Resistance
Test
on p. 119
•
Refer to
Ignition Coil Tests
on p. 119.
Steady spark on all cylinders:
•
Refer to
Running Ignition Tests
on p. 118 and
DYNAMIC TESTS
on p. 112.
Running Ignition Tests
Use
Evinrude Diagnostics
software to monitor
system voltage (55 V) and ignition voltage
(200 V).
•
Voltage readings at a specific speed (RPM)
should be steady.
•
Refer to
System Voltage Test
on p. 116.
•
Refer to
Ignition Voltage Test
on p. 117.
Use an inductive timing light to monitor the spark
signal through each of the secondary circuit
(spark plug lead) wires.
Start outboard and observe timing light strobe.
Look for a consistent flash and only one flash per
revolution. The strobe of the timing light should be
the same for each cylinder.
IMPORTANT:
Test on primary circuit if strobe
from secondary circuit appears faulty.
Results:
Steady voltage and strobe, engine misfires:
•
Inspect or replace spark plugs
•
Refer to
FUEL DELIVERY TESTS
on p. 120.
•
Check for internal engine damage.
Steady voltage, erratic strobe, engine misfires:
•
Inspect or replace spark plugs
•
Check CPS air gap and resistance.
•
Refer to
Ignition Primary Circuit Resistance
Test
on p. 119.
•
Refer to
Ignition Coil Tests
on p. 119.
Voltages fluctuate, engine misfires:
•
Inspect battery and connections
•
Test capacitor and all ground connections.
•
Refer to
System Voltage Test
on p. 116
•
Refer to
Ignition Voltage Test
on p. 117
•
Refer to
Ignition Primary Circuit Resistance
Test
on p. 119.
•
Refer to
Ignition Coil Tests
on p. 119.
IMPORTANT:
If a running problem occurs at
about 1200 RPM, the outboard may be in
S.A.F.E.
Refer to
S.A.F.E. WARNING SYSTEM
on p. 100.
1. Timing light pick-up
2. Ignition coil primary wire
004327
1
2
1. Timing light pick-up
2. Spark plug lead
004255
1 2