How do I Test a Briggs 12 HP Starter Circuit?

Written by justin mark
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If your Briggs & Stratton 12-horsepower engine does not start at the turn of the ignition key, the electrical system is the likely culprit. The electrical system of a small engine supplies power to charge the battery that's needed to start the engine. It also supplies power to other electrical devices. Briggs & Stratton has provided an AC Volts/DC Amps Meter Settings Chart to aid you in properly checking the electrical system of your small Briggs engine.

Skill level:
Moderately Easy

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Things you need

  • Utility knife
  • Multitester
  • Tachometer

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Instructions

    Determine the Test Needed

  1. 1

    Turn the engine off.

  2. 2

    Disconnect the wires attached to the engine's stator. The wires are located under the engine's flywheel.

  3. 3

    Check the colour of the wire and the connector. Use the utility knife to scrape off any paint covering the wire and the connector.

  4. 4

    Verify the correct test for your engine by comparing the wire and connector colour combination from the Briggs & Stratton AC Volts/DC Amps Meter Settings Chart (see References).

    AC Volts Test

  1. 1

    Follow the instructions on the AC Volts/DC Amps Meter Settings Chart on the proper setting of the multitester and connecting the multitester to the engine.

  2. 2

    Connect the black lead from the multitester to the engine's body or to an engine bolt if the black lead is required to be connected to ground.

  3. 3

    Turn on the engine and let it run for a few minutes.

  4. 4

    Verify the engine's speed using the tachometer. Check the reading on the multitester. You will need to replace the stator if the reading on the multitester does not match the engine's corresponding number on the AC Volts/DC Amps Meter Settings Chart.

  5. 5

    Turn the engine off and disconnect the multitester from the engine.

    DC Amps Test

  1. 1

    Follow the instructions on the AC Volts/DC Amps Meter Settings Chart on the proper setting of the multitester and connection of the multitester to the connector.

  2. 2

    Connect the black lead from the multitester to the positive terminal of the engine's battery.

  3. 3

    Turn on the engine and let it run for a few minutes.

  4. 4

    Verify the engine's speed using the tachometer. Check the reading on the multitester. You will need to replace the stator, the diode or the regulator if the reading on the multitester does not match the engine's corresponding number on the AC Volts/DC Amps Meter Settings Chart.

  5. 5

    Turn the engine off and disconnect the multitester from the engine.

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