GENERAL SYSTEM DIAGNOSTICS
SERVICE MANUAL NUMBER 23
90-861326--1 MARCH 1999 Page 5E-87
Chart A-7 (4 of 6): Ignition System Check (Continued)
Step Action Value(s) Yes No
4
1. Disconnect distributor 4-wire
connector.
2. Check for secondary spark.
Is Adequate Spark Present?
_
Go to Step
18 Go to Step
5
5
1. Reconnect distributor 4-wire
connector.
2. Check for secondary spark
from the coil tower using a
known good coil wire.
Is Adequate Spark Present?
_
Go to Step
19 Go to Step
6
6
1. Disconnect distributor 2-wire
“C/+” connector harness.
2. Ignition “ON,” engine “OFF.”
3. Using DVOM, check voltage
at “+” and “C” terminals of the
2-wire distributor harness
connector.
Is Voltage Reading Greater
Than The Specified Value At
Both Terminals?
10 volts
Go to Step
8 Go to Step
7
7
Is Voltage Reading Less Than
The Specified Value At Both
Terminals?
10 volts
Go to Step
20 Go to Step
21
8
1. Reconnect distributor 2-wire
connector.
2. Ignition “ON” engine “OFF.”
3. Using DVOM, check voltage
from tach terminal to ground.
4. The tach terminal can be
accessed at the 5-wire boat
harness connector. The tach
circuit is the WHITE wire CKT
121.
Is Voltage Reading Within The
Specified Value?
1-10 volts
Go to Step
15 Go to Step
9
9
Is Voltage Reading Greater
Than The Specified Value?
10 volts
Go to Step
10 Go to Step
22
10
1. Using a test light connected
to ground, probe tach termi-
nal at the 5-wire harness con-
nector.
2. Observe the test light while
cranking engine.
Is Test Light Blinking?
Go to Step
13 Go to Step
11
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