272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf

2. Two BLACK leads (2) from stator.
3. YELLOW connector (3) with two pin terminals.
4. Two YELLOW leads (4) to regulator-rectifier.
5. Regulator-rectifier (5).
6. One RED lead from regulator-rectifier to RED
connector output lead (6).
• 20 Volts – 10 Amp System
• 30 Volts – 16 Amp System
6. If NO or LOW output is found check for bare
wires or other defects. If wiring defects are not
visible, replace the stator.
Regulator-Rectifier Test
NOTE: Make sure the regulator-rectifier is securely
mounted to engine. Regulator-rectifier will
not function unless it is grounded to engine.
When testing regulator-rectifier for
amperage output, a 12 volt battery with a
minimum charge of 5 volts is required.
There will be no output if battery voltage is
below 5 volts.
Fig. 26
Output Test
Temporarily, disconnect stator wire harness from
regulator-rectifier.
1. Insert RED test lead into V receptacle in meter.
2. Insert BLACK test lead into COM receptacle.
3. Rotate selector to V~ (AC VOLTS) position.
4. Insert RED (1) and BLACK (2) test lead probes
into output terminals (4, 5) in YELLOW
connector (3), as shown in Fig. 27. (Test clip
leads may be attached to either terminal.)
CAUTION: Connect test leads BEFORE starting
engine. Be sure connections are secure. If a test
lead vibrates loose while engine is running, the
regulator-rectifier could be damaged.
Use the DC Shunt #19359 (4) to avoid blowing the
fuse in the test meter when testing the DC output of
the 16 amp system.
The DC shunt MUST be installed to the NEGATIVE
(-) terminal of the battery, Fig. 28. All connections
must be clean and tight to obtain accurate readings.
1. Connect stator wire harness to
regulator-rectifier.
2. Install shunt to negative battery terminal.
3. Insert RED test lead (1) into V receptacle in
meter. Connect to RED post terminal (3) on
shunt, Fig. 28.
4. Insert BLACK test lead (2) into COM receptacle
in meter and connect to BLACK post terminal (5)
on shunt.
ÌÌ
5. Rotate selector to 300mV position.
Fig. 27
5. With the engine running at 3600 RPM output
should be no less than:
6. With the engine running at 3600 RPM, the output
should be:
• 3-10 Amps – 10 Amp System
• 3-16 Amps – 16 Amp System
NOTE: The amperage produced depends on
battery voltage. If the battery is below 11
volts, the output would be 10 or 16 amps
depending on the alternator system being
tested. The amperage will be less at
maximum battery voltage.
42