Section 12 ELECTRICAL SYSTEM
Subsection 01 (IGNITION SYSTEM)
Generating Coil Verification
717 Engines
STATIC TEST
Disconnect magneto wiring harness connector.
Install the 4-pin magneto harness adapter
(P/N 295 000 131).
F01B28A
TYPICAL
Check resistance with a multimeter. Refer to the
following table for values and wire colors.
PART NAME
ADAPTER
WIRE
RESISTANCE
Generating coil
BLACK with
RED/BLACK
40 - 76
F01H5WA
21
3
4
1. Multimeter
2. 4-pin magneto harness adapter
3. RED/BLACK wire
4. BLACK wire
DYNAMIC TEST
1) Connect spark plug cables to grounding device.
2) Disconnect magneto wiring harness connec-
tor.
3) Install the 4-pin magneto harness adapter
(P/N 295 000 131).
4) Connect positive test probe of the multimeter
to the RED/BLACK wire of the 4-pin magneto
harness adapter.
5) Connect negative test probe of the multimeter
to BLACK wire of the 4-pin magneto harness
adapter.
6) Set multimeter to Vac scale.
7) Crank engine and note result. The obtained
value should be between 18 and 25 Vac.
8) If the generating coil is out of specification, re-
place it.
NOTE: If the generating coil tests good, discon-
nect the primary wires of the ignition coil. Crank
engine and check voltage at primary wires. It
should be at least 20 Vac. If there is insufficient
or no voltage, either the MPEM or wiring harness
is defective.
Ignition Coil Verification
STATIC TEST
NOTE: An ignition coil with good resistance mea-
surement can still be faulty. Voltage leak can oc-
cur at high voltage level which is not detectable
with an ohmmeter.
717 Engines
Primary Winding
3
1
F17H04A
2
3
1. Primary side
2. Secondary side
3. Ground plate
Disconnect the wire connectors on primary side
of the ignition coil.
Using a multimeter, check the resistance between
the primary side connectors of the coil.
Theresistanceshouldbe0.34to0.62 at 20°C.
If not within specification, replace the ignition coil.
smr2004-Complete Line Up 553
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