CHECKS AND ADJUSTMENTS (Cont'd)
Distributor Tests
Test Connections
Disconnect the distributor primary wire from the coil.
Connect a short jumper wire to the DIST connection of the
coil and the distributor primary wire. Connect the read
wire to the jumper wire.
Connect the
black wire to a good ground location on the
engine
Dwell Angle Check
Connect the tester. Turn the test control knob to the set
position.
Adjust the
control knob until the needle on the dwell meter
is
in
alignment with the set line.
Start
the engine and let it idle. Turn the cylinder selector
to the four.
Read the swell angle on the dwell meter and compare the
reading to specifications.
(See Section 8 TECHNICAL
DATA.)
Turn off the engine. If the dwell angle was below the
specified amount, the breaker point gap is wide.
If
the
dwell angle was above the specified amount, the breaker
point gap is narrow.
If the dwell is at specifications, tum the test selector knob
to the OFF position and disconnect the tester leads and
jumper wire.
Make adjustment to the points as needed.
Spark Strength Tests
Remove the coil high voltage wire from the distributor cap.
Turn the ignition switch to ON position.
While
holding the high tension lead about 3/16 inch from
the cylinder head or any other good ground turn the
engine over.
If
the spark is good, the problem is
in
the
secondary circuit.
Spark plugs
or
spark plug wires are
damaged.
If there is no spark or a small amount of spark, the
problem
is
in
the primary circuit. The coil to the distributor
wire, or the coil is damaged.
Ignition System Tests
Battery To Coil
Voltmeter Test
Connect the voltmeter wires as shown
in
[AJ. Connect a
jumper wire to the distributor connection of the coil and to
a good ground location on the distributor housing.
Turn the lights and accessories off. Turn the ignition
switch to
ON
position.
If the voltmeter reading is between 4.5 and 6.9 bolts the
primary circuit from the battery to the coil is good.
Revised Oct. 97
A
-7B-6-
Primary
Wire
From
Switch
To
B
Terminal
741,742,743,
743DS
Bobcat
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