Service Manual

2. Pull spark plug wires off spark plugs and remove spark plugs. Connect
an approved spark tester to each of the spark plug wires and ground
them away from the spark plug hole. Turn the key on and crank the
engine over for 5 seconds while watching for spark. If a spark occurs
regularly, the problem is not in the ignition system. If no spark occurs,
go to step 3.
Caution: Never put jumper lead to the coil negative terminal. This will
cause failure of the electronic ignition module.
3. Connect a jumper lead directly from the positive battery terminal to the
positive (+) coil terminal (smaller diameter of the two threaded posts).
Crank the engine over while watching for spark. If spark occurs, the
problem is in the low oil pressure cut out switch (if equipped) or
relating wiring, the lubricating system (low oil pressure), or in the other
circuitry bringing voltage to the coil. If no spark occurs, go to step 4.
4 . Refer to IGNITION COIL section to test coil for proper resistance. If coil
checks out good, go to step 5.
5. Connect positive side of voltmeter to negative (-) coil terminal (larger
diameter of the two threaded posts) and negative side of voltmeter to
engine ground. Turn the key on and rotate flywheel slowly by hand
while observing voltmeter. Voltage should switch between battery
voltage and 1-1.5 for each revolution. If voltage does not switch
properly, replace ignition module.
Caution: Never put B+ lead to the coil negative terminal. This will
cause failure of the electronic ignition module.
6. Install spark plugs and wires. If ignition module is being replaced, be
sure to connect red lead from new ignition module to positive (+)
terminal of coil, black lead from module to negative (-) terminal of coil.
Flywheel
Timing
Mark
Blower Housing
Timing Marks
Glossary
GLOSSARY
3-14 Demystification Guide