How to test a lawn mower starter with a multimeter

How to test a lawn mower starter with a multimeter. Are you having a hard time starting the lawnmower? It can be troublesome. There might be an issue with the battery or any unknown cause.

To check the lawnmower, all you need is a simple instrument called a multimeter. The multimeter diagnoses the problem within your device by measuring the current, voltage, and resistance. Each of the values provided by the multimeter indicates a faulty cause or either no issue.

How to test a lawn mower starter with a multimeter

Check the values in the specifications manual to interpret the accurate results. Identify the issue, and get back on the working track. Grab your multimeter and start the testing procedure.

Safety

Before testing, ensure proper safety.

  • Insulated Gloves
  • Goggles
  • Specifications manual

Tools

  • Multimeter
  • Power supply battery
  • Wrench
  • Screwdriver

Multimeter

Lawnmowers can be tested for faulty engine starters by a digital multimeter.

Millimeters are of two types 

  1. Analogue
  2. Digital

Purchase a digital one for accurate results.

Here is the tool you need!

Procedure 

Testing the Lawn Mower Battery

  1. Start the process by connecting multimeters both leads to the lawnmower battery terminals.
  2. Connect the red (negative) to the battery’s positive terminal while the black (positive) to the battery’s negative terminal.
  3. Select the voltage option in the multimeter and connect it to the battery.
  4. After connecting, the multimeter will show a value on the screen.
  5. If your battery is charged full, the value will be almost 12 V.
  6. A lower value, let’s say 3 Volts, will indicate a battery issue.
  7. Try fixing the issue by fully charging the battery.
  8. Avoid proceeding to the next step until the battery seems fully charged.
  9. The value of voltage is not ideal and may vary from model to model.

Testing the Lawn Mower Starter

  1. Once the battery is fully charged, disconnect it and check for the terminals.
  2. In case of any dust, dirt, or corrosion, clean the site.
  3. Once you have done with the cleaning process, remove the lawn starter with the help of a wrench and screwdriver.
  4. Connect the starter to the multimeter device with a power supply of 12V. The black lead will be connected to the starter negative terminal (starter frame), while the red one to the positive terminal.
  5. Turn on the power supply.
  6. The multimeter will show a value on the screen.
  7. If the value is 12Volts, the starter is working efficiently.
  8. You can double-check the starter by connecting it to the power supply of 12 V.
  9. The terminals connected to the leads result in either a flywheel spinning motion or no motion at all.
  10. In the case of spinning motion, the starter is working perfectly.
  11. In case of no motion, there is an issue in the starter connections or any internal part.

Testing the Lawn Mower Solenoid Frame

  1. When both the battery and tester are working fine, there might be a chance the issue lies in other parts of the lawnmower.
  2. It includes a solenoid frame. Testing the solenoid with a multimeter identifies the efficiency of the solenoid. It’s an easy step. Let’s start testing!
  3. Take out the solenoid part from the lawnmower.
  4. Make sure that the battery and multimeter are in your hands.
  5. Connect the leads, black to the solenoid frame (negative) while red to the positive terminal.
  6. After securing the connections, turn on the power.
  7. In case if the solenoid is working well-clicking sound will be produced.
  8. The multimeter will give a value on the screen. A lower than 12 volts, let say  04 volts indicates an issue with the solenoid frame.

Conclusion

Using a multimeter to identify the issue within the lawnmower is now done by following the step-wise procedure given above. The problem either lies in the battery, starter, or solenoid frame. Identify the issue and fix it.

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