Briggs & Stratton 273521, 271172, 270962, CE8069, 276535 manual Tri-CircuitAlternator, Test Diode

2

Figure 21

6.With the engine running at 3600 RPM, output should be between 2 - 4 Amps DC.

NOTE: The output will vary with the battery voltage. At maximum battery voltage the output will be approximately 2 Amps.

7. If NO or LOW output is found, test diode.

Test Diode

In the Diode Test position, the meter will display forward voltage drop across the diode(s). If voltage drop is less than 0.7 volts, meter will “Beep” once as well as display voltage drop. A continuous tone indicates continuity (shorted diode). An incomplete circuit (open diode) will be displayed as “OL.”

1.Insert RED test lead (A, Figure 22) into the V Ω receptacle and set the rotary switch to Diode position.

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

3.Attach RED test lead clip to point (C) and Black test lead clip to point (D). (It may be necessary to pierce wire with a pin as shown.)

Figure 22

•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.

4.Reverse test leads.

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

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

5.If diode tests OK, replace stator.

NOTE: Service replacement diode harnesses are available. Use Rosin Core solder when installing new harness. Use shrink tubing or tape for all connections. Do not use crimp connectors.

Tri-Circuit Alternator

The tri-circuit alternator provides alternating current (AC) through a single output lead and connector to a wiring harness containing two diodes.

One diode rectifies the AC current to 5 Amps negative (-) DC for lights. The second diode rectifies the AC current to 5 Amps positive (+) DC for battery charging and external loads, such as an electric clutch.

NOTE: Some original equipment manufacturers (OEMs) supply diodes as an integral part of the equipment wiring harness. Some OEMs use a 1 Ohm-20 Watt resistor placed in series with (+)

DC charging lead, limiting the charging current to approximately 3 Amps when the clutch is not engaged. When the clutch is engaged, the

36