Briggs & Stratton 272147 Repair Manual page 29

CAUTION
: Attach meter test leads to AC output
terminals in white connector (yellow wires) BEFORE
STARTING ENGINE. If stator is grounded (defective),
and meter test leads contact center DC output pin in
white connector (red wire), arcing may occur which
may damage wiring.
4. Attach and
RED BLACK
output terminals in white connector (yellow wires)
, Fig. 30. (Meter test clip leads may be
attached to either AC output terminal.)
5. With the engine running at 3600 RPM output
should be no less than:
26 Volts - 20 Amp System
Fig. 30
6. If no or low output is found, check for bare wires or
any other obvious defects. If "shorted" leads are
not visible, replace the stator.
Testing DC Output Charging Wire
A simple test may be performed to test the DC output
charging wire circuit. If a problem exists in the wiring, it
can be corrected before testing regulator-rectifier.
Leave stator wire harness disconnected from regulator-
rectifier.
Equipment key switch must be in
1. Insert test lead into
RED
2. Insert test lead into
BLACK
meter.
3. Rotate selector to DC volts position.
Page 24
test lead probes to AC
position.
OFF
receptacle in meter.
receptacle in
TM
Vanguard Twin-Cylinder OHV Liquid-Cooled Engine
4. Attach test lead probe to DC output terminal
RED
in white connector (red wire), Fig.31.
Fig. 31
5. Attach test lead probe to negative battery
BLACK
terminal.
6. Turn equipment key switch to
should display battery voltage.
7. If meter does not display battery voltage, check for
blown fuse, broken, or shorted wires.
Testing Regulator-Rectifier
Regulator-rectifier will not function unless it is grounded
to engine. Make sure the regulator-rectifier is securely
mounted to engine.
To avoid blowing fuse in meter when testing DC output
of 20 amp system, the DC Shunt, Tool
required.
The DC Shunt must be installed on the negative (-)
terminal of the battery. All connections must be clean
and tight for correct amperage readings.
Connect stator wire harness to regulator-rectifier.
1. Install shunt on negative battery terminal.
2. Insert test lead into
RED
and connect to
RED
3. Insert test lead into
BLACK
meter and connect to
shunt, Fig. 32.
Section 2 - Troubleshooting
position. Meter
ON
is
#19468
receptacle in meter
post terminal on shunt.
receptacle in
post terminal
BLACK
on