8.5
Section 8
Electrical System and Components
8
Problem
Engine
Will Not
Start
Test
1. Make sure the spark plug lead is connected
to the spark plug.
4. Measure the resistance of module secondary
using an ohmmeter (see Figures 8-3 and 8-4):
Connect one ohmmeter lead to laminations
(A). Connect the other lead to the spark plug
terminal of high-tension lead (C). With
ohmmeter leads connected in this manner,
the resistance of secondary should be
7,900 to 18,400 ohms.
NOTE: This test cannot be performed unless
module has been fired at least once.
Conclusion
2. If plug is in good condition, check/adjust
gap and reinstall.
2. Check the condition of spark plug. Make sure
gap is set correctly. See Page 8.1.
3. Check ignition module using test plug. (Refer
to Section 2 - “Tools & Aids).”
a. Remove the high-tension lead from the
engine spark plug and connect it to the
test plug.
NOTE: To maintain engine speeds
normally obtained during
cranking, do not remove the
engine spark plug.
b. Make sure the engine ignition switch, kill
switch, or key switch is in the run position.
c. Crank the engine and observe the test
plug. Visible and audible sparks should be
produced.
4. If the resistance is low or 0 ohms, the
module secondary is shorted. Replace the
module.
If the resistance is high or infinity ohms, the
module secondary is open. Replace the
module.
If the resistance is within the specified
range, the module secondary is OK.
3. If visible and audible sparks are produced,
the ignition module is OK.
If visible and audible sparks are not
produced:
a. Make sure the engine ignition switch, kill
switch, or key switch is in the run
position.
b. Check wires and terminals of ignition
module and other components for
accidental grounding and damaged
insulation.
c. If wires and terminals are OK, the
ignition module is probably faulty and
should be replaced. Test module further
using an ohmmeter (Test 4).
Figure 8-4. Testing Module Secondary.
Magneto Ignition System Troubleshooting Guide
The following guide will help locate and correct ignition system-related starting problems. Refer to Section 2,
“Tools & Aids” for ignition system tester.
NOTE: Use a low-voltage (2 volts or less) ohmmeter when ohmmeter is required. Always zero ohmmeter on
each scale before testing to ensure accurate readings.
Ignition Module Removal and Installation
Refer to the Disassembly and Reassembly sections for
complete ignition module removal and installation
procedures.
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