Generac Power Systems NP-40G - Manual (Page 95)

Section 6.4- ENGINE IGNITION SYSTEM
Testing the System (Continued)
CHECK IGNITION SENSOR (CONT’D);
4. Crank the engine and
observe the spark tester
for sparking.
If sparking occurs with
the BROWN wire
grounded but did NOT
occur under "TESTING
FOR SPARK", the Ignition
Sensor is probabiy defec­
tive and shouid be re-
piaced.
NOTE: The Ignition Sensor Is mounted to the
generator's Stator Adapter. To replace the Sensor,
disassembly of the generator and removal of the
Stator will be necessary.
If sparking does NOT occur with the BROWN wire
grounded and did NOT occur under "TESTING FOR
SPARK", either the Ignition Module or the Ignition
Coil is defective. Go to "TESTING IGNITION COIL".
IGNITION SENSOR" and under "TESTING IGNITION
COIL". If these components tested good, replace
the Ignition Module.
Figure 13. Testing Ignition Coll
Si
16,000-17,000 OHMS
TESTING IGNITION COIL:
The Ignition Coil is housed In the generator con­
trol panel. To test the coil, proceed as follows:
1. Unplug the two halves of the 2-pin connector
plug from the Ignition Coil. The red and white wires
are the primary coil leads.
2. To read PRIMARY coil resistance:
a. Set a volt-ohm-milllammeter (VOM) to its "Rx1"
scale and zero the meter.
b. Connect the VOM test leads across the two
male pins of the 2-pin connector. Primary coil
resistance should be about 0.5 to 1.5 ohms.
3. To read SECONDARY coil resistance:
a. Set the VOM to its "Rxl0,000" or "Rx1K" scale
and zero the meter.
b. Unplug the high tension lead from the Spark
Plug.
c. Connect one VOM test lead to the white wire
connector pin.
d. Connect the other VOM test lead into the Spark
Plug lead rubber boot so it contacts the lead’s
metal terminal end. The VOM should read ap­
proximately 16,000-17,000 ohms (16.0-17.0 k-
Ohms).
Replace the Ignition Coil if defective. If the Ignition
Coll tested good, go to "TESTING IGNITION MOD­
ULE".
TESTING IGNITION MODULE:
If a problem was indicated under "TESTING FOR
SPARK", you should have completed the tests
under "CHECK POWER SUPPLY", under "CHECK
Page 6.4-4