Alternator Testing - Briggs & Stratton 110000 Service, Troubleshooting, And Repair Manual

Alternator Testing

When testing alternators, perform the tests in the
following sequence:
1. Test alternator output.
2. Test diode(s) or regulator-rectifier (if
equipped).
The 0.5 Amp, DC alternator (Figure 2-6) is
designed to operate as an integral part of the
engine and is separate from the starting and
ignition system. It is intended to provide DC
charging current for a 12 Volt battery.
• Unregulated
• 0.5 Amp DC for charging battery
• One black lead (A) from stator
• White connector (B) output lead
Figure 2 - 6
1. Disconnect charging lead to battery at
white connector.
2. Insert RED test lead into 10 Amps
receptacle in meter.
3. Insert BLACK test lead into COM
receptacle in meter.
4. Rotate selector to DC Amps position.
5. Attach RED test clip to output lead (A,
Figure 2-7).
6. Attach BLACK test clip to charging lead
(B).
Figure 2 - 7
7. Install tachometer, then start and run
engine at 2800 RPM. Meter should display
no less than 0.5 Amp DC.
8. If low or no output, check alternator air
gap. Adjust to value listed in Section 12 -
Engine Specifications.
9. If alternator air gap is within specification
and there is still low or no output, replace
alternator.
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