Briggs & Stratton 270962, 271172, CE8069 5 & 9 Amp DC Regulated Alternator, Test Alternator Output

2.Insert BLACK test lead (B) into the COM receptacle in the meter.

3.Attach RED test lead clip to (D) of the WHITE wire (C). (It may be necessary to pierce wire with a pin as shown.)

4.Insert BLACK test lead (B) into harness connector.

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Figure 25

•If meter “Beeps” once, diode is OK.

•If meter makes a continuous tone, diode is defective (shorted).

•If meter displays “OL,” proceed to Step 4.

5.Reverse test leads.

•If meter “Beeps” once, diode is installed backwards.

•If meter still displays “OL,” diode is defective (open).

6.If diode tests OK, replace stator.

5 & 9 Amp DC Regulated Alternator

The 5 & 9 Amp regulated alternator systems provide AC current through a single lead into the regulator-rectifier. The regulator-rectifier converts the AC current to DC and regulates current to the battery. The charging rate will vary with engine RPM and temperature.

Alternator output is determined by the flywheel alternator magnet size. The stator and regulator- rectifier are the same for the 5 & 9 Amp regulated system and the Tri-Circuit System.

Test Alternator Output

1.Temporarily disconnect stator wire harness from the regulator-rectifier.

2.Insert RED test lead (A, Figure 26) into the V Ω receptacle in the meter.

3.Insert BLACK test lead (B) into COM receptacle.

4.Rotate selector to AC Volts position.

5.Attach RED test lead clip to GREEN output terminal (C).

6.Attach BLACK test lead clip to engine ground.

Figure 26

7.With engine running at 3600 RPM, AC output should be no less than:

•28 Volts AC - 5 Amp System

•40 Volts AC - 9 Amp System

8.If NO or LOW output is found, replace the stator.

Test Regulator-Rectifier

NOTE: The regulator-rectifier will not function unless it is grounded to engine. Make sure the regulator-rectifier is securely mounted to the engine. When testing regulator-rectifier 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.

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.

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