Briggs & Stratton 276535, 271172, 270962, CE8069, 273521 Install shunt to negative -battery terminal

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NOTICE: Connect test leads BEFORE starting the engine. Be sure connections are secure. If a test lead vibrates loose while engine is running, the regulator-rectifier may be damaged.

Use the DC Shunt #19468 (D, Figure 29) 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. 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 (A) into V Ω receptacle in meter. Connect to RED post terminal (C) on shunt.

4.Insert BLACK test lead (B) into COM receptacle in meter and connect to BLACK post terminal (E) on shunt.

5.Rotate selector to 300mV position.

and all connections are clean and secure. If there is still NO or LOW output, replace the regulator-rectifier.

Regulator-Rectifier with Charge Indicator The regulator-rectifier #493219 is used by OEMs that have a charging indicator light instead of an ammeter. In addition to the RED DC output wire (A, Figure 30), the regulator-rectifier has a blue wire (B) to activate a charging indicator light when battery voltage is below 12 volts. The connector has a raised rib (C) on the red wire side to indicate the output side of the connector.

Figure 29

6.Run the engine 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 the battery voltage. If the battery is below 11 Volts, the output reading would be 10 or 16 Amps, depending upon the alternator system being tested. The amperage will be less at maximum battery voltage.

7.If NO or LOW output is found, be sure that the regulator-rectifier is grounded properly

Figure 30

The charging indicator light should light when the key switch in ON and the engine not running. With the engine running, the charging indicator light should go out, indicating that the charging circuit is operating and the battery voltage in above 12 volts.

The charge indicator light and wiring is supplied by the OEM.

DC charging output values and test procedures are the same as those listed for the 10 amp and 16 amp systems.

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