Test 35 - Check And Adjust Ignition Magnetos - Generac Power Systems GP Series Diagnostic And Repair Manual

Section 4 AC Diagnostic Tests
If voltage was not measured in step 3 connect one
7.
meter test lead to wire 229 removed from the SSR.
Connect the other meter test lead to wire 229 at the
8.
terminal block 1 (TB1). Continuity should be
measured.
a. If continuity is not measured repair or replace
wire 229 between SSR and TB1.
NOTE: Where terminal block is not present, place meter
test lead on the wire at the termination point. If
necessary, use a small paper clip to probe beside the
wire so as not to damage the terminal in the connector.
Remove the J2 connector the printed circuit board.
9.
Connect one meter test lead to pin location J2-8
10.
(wire 229)
86 15B 167
0 229 83
TB1
J2-1
J2 HARNESS CONNECTOR
Figure 4-47. Testing Wire 229 Between J2 Connector
and Terminal Block 1 (TB1)
See Figure 4-47. Connect the other meter test
11.
lead to wire 229 at TB1. Continuity should be
measured.
a. If continuity is not measured repair or replace
wire 229 between the J2 connector and TB1.
Results
If step 5 passed refer to Flow Chart.
1.
If step 5 failed and step 11 passed replace the
2.
printed circuit board.
54
BLK
BLK
00.00
TR2
TR1
J2-12
004629
Test 35 – Check and Adjust Ignition
Magnetos
Procedure
See Figure 4-48. Rotate the flywheel until the
1.
magnet is under
laminations.
Place a 0.008-0.012 inch (0.20-0.30mm) thickness
2.
gauge between the flywheel magnet and the
module laminations.
Figure 4-48. Setting Ignition Magneto Air Gap
Loosen the mounting screws and let the magnet
3.
pull the magneto down against the thickness
gauge.
Tighten both mounting screws.
4.
To remove the thickness gauge, rotate the
5.
flywheel.
Repeat the above procedure for the second
6.
magneto.
Repeat Test 29 – Check Ignition Spark
7.
check for spark across the spark tester gap.
If air gap was not out of adjustment, remove engine
8.
ground harness from magnetos. Repeat
Check Ignition Spark. If sparking now occurs
replace engine ground harness.
Check the flywheel
9.
screwdriver at the extreme end of its handle and
with its point down. When the tip of the screwdriver
is moved to within 3/4 inch (19 mm) of the magnet,
the blade should be pulled in against the magnet.
Check the flywheel key. The flywheel's taper is
10.
locked on the crankshaft taper by the torque of the
flywheel nut. A keyway is provided for alignment
only and theoretically carries no load.
NOTE: If the flywheel key becomes sheared or even
partially sheared, ignition timing can change. Incorrect
timing can result in hard starting or failure to start.
the module (armature)
and
Test 29 –
magnet by holding
Diagnostic Repair Manual
a