Briggs & Stratton 115400, Manual

Page: 43 / 281

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2
Fig. 23
When checking alternator components, make
tests in the following sequence:
Test Alternator Output
1. Temporarily disconnect stator wire
harness from regulator-rectifier.
2. Set meter to AC Volts position. See Figure
5.
3. Insert RED and Black test lead probes into
output terminals in yellow connector, as
shown in Figure 24.
4. With engine running at 3600 RPM output
should be no less than:
• 20 Volts- 10 Amp System
• 30 Volts- 16 Amp System
5. If NO or LOW output is found check for
bare wires or other defects. If wiring
defects are not visible, replace the stator.
Fig. 24
Regulator-Rectifie r Test
In order to avoid blowing the fuse in the meter,
DC shunt tool
#19359
is required when testing
the 10 & 16 Amp systems. The DC shunt must
be installed on the negative (-) terminal of the
battery.
Fig. 25
All connections must be clean and tight for
correct amperage readings.
Make sure the stator wire harness is connected
to the regulator-rectifier.
Make tests in the following sequence:
1. Install shunt on negative battery terminal.
2. Set Meter. See Figure 7.
3. Connect RED test lead to Red post
terminal on shunt ([ A ] Fig. 25).
4. Connect BLACK test lead to BLACK post
terminal on shunt ([ B ] Fig. 25).
5. Start engine and stabilize at 3600 RPM.
Output should be:
• 3-10 Amps for a 10 Amp System
• 3-16 Amps for a 16 Amp System
If no or low output is found:
• Be sure that the regulator–rectifier is
grounded and all connections are clean
and secure.
If there is still
no or low output:
• Replace the reg ulator–rectifier.