How To Test A Lawn Mower Starter?


Lawn mower starter testing is crucial to ensure its smooth operation. Testing the starter starts with checking the battery and spark plugs. Then, parts such as ignition coil and solenoid require inspection. Here, we will discuss the process of how to test a lawn mower starter in detail.

Moving on, it is important to understand that if the engine cranks or sounds unusual while starting, it is likely that there’s a problem with your lawn mower’s starter. To start testing it, you can use a digital multi-meter to measure the voltage at different parts of the system and identify any damaged components.

Furthermore, understanding the electrical wiring diagram and following safety instructions during testing is crucial for effective diagnosis. Once diagnosed, replace faulty components for optimal performance.

Let’s get this starter motor tested, before your lawn becomes a jungle.

Testing the Starter Motor

To ensure the proper functioning of your lawn mower, testing the performance of its starter motor is important. This can be done easily and without requiring any special skills or tools.

Follow these six steps to test your lawn mower’s starter motor:

  1. Disconnect the spark plug wire from the spark plug and remove the engine cover
  2. Locate the starter motor and check its connections and wiring for any damage or looseness
  3. Attach a voltmeter to the battery and test the voltage reading. It should be around 12 volts for a fully charged battery
  4. Connect the voltmeter to the starter motor and try starting the mower
  5. Check the voltage reading on the voltmeter when trying to start the mower. If it drops below 9 volts, the starter motor needs to be replaced
  6. If the voltage reading is consistent, the starter motor is functioning properly.

It is important to ensure the safety measures are taken while working on the lawn mower. Disconnect the spark plug wire and use protective gear such as gloves and goggles. Avoid touching the starter motor while it’s running, and make sure everything is back in place before starting the mower again.

Regular maintenance and cleaning of the lawn mower can ensure the top performance of the starter motor. Checking the battery level and keeping it charged can also prevent damage to the starter motor. If the starter motor needs to be replaced, buy a genuine replacement part to ensure proper functioning.

Before you jumpstart your day with testing the mower starter, make sure the battery voltage isn’t as dead as your ex’s heart.

Check the Battery Voltage

To measure the electrical potential of the battery, evaluate the voltage. This process is critical to starting up a vehicle. Low voltage, indicating an insufficient charge on the battery, may signify that the starter motor will not function correctly.

Continuously sustained voltage of at least 12.5 volts across the battery while attempting to power up is essential for proper starter motor operation. The best way to avoid premature replacement is through regular monitoring.

A low reading could also suggest a technical issue with connections or even faults in charging systems which is only detectable by trained professionals with thorough testing tools.

According to “Car Mechanics for Dummies” by Deanna Sclar, measurements below 11 volts indicate that your car’s battery should be checked and/or replaced before trying any other procedures.

Get up close and personal with the starter gear, it’s not as intimidating as it sounds – unless you’re the gear.

Inspect the Starter Gear

The examination of the starter gear is an important aspect of testing the starter motor. It involves a thorough inspection of the gear teeth and conditions.

  • Check if there are any signs of wear or damage on the gear teeth
  • Look for chipped, broken or missing gear teeth
  • Determine if the gear meshes properly with the ring gear
  • Inspect for any apparent oil leaks on or around the gear area

Furthermore, ensure that all mounting bolts are secure and in good condition.

Pro Tip: Always check the manufacturer’s specifications and service manual for guidelines on how to carry out starter motor inspection procedures.

Let’s hope the starter connections aren’t as dirty as your browser history.

Clean the Starter Connections

To ensure the smooth functioning of the starter, it is crucial to keep the connections clean. Neglecting this maintenance can result in stalling of your vehicle.

Here is a guide on how to clean the starter connections:

  1. Disconnect the car battery before starting
  2. Identify the starter and its connections
  3. Clean any rust or dirt around the connection with a wire brush
  4. Gently remove any grime or debris from the connector pin, using sandpaper or a metal file if necessary
  5. Reconnect the connector and tighten it with a wrench
  6. Lastly, reconnect your car’s battery.

Remember that when cleaning these connections, you need to be gentle yet thorough as any damage to them could lead to further problems down the line.

It’s worth noting that you should also regularly check for signs of corrosion or wear in these connections. If they’re damaged or showing signs of age, you might want to consider replacing them.

To avoid damaging your starter during cleaning, we suggest considering wearing gloves and protective goggles. Not only will they protect your hands and eyes from cleaning agents but also sharp metal edges.

By taking care of your starter motor connections regularly, you can evade unwanted breakdowns and extend its lifespan.

Can’t get your engine to start? Let a multimeter give it the shock it needs.

Use a Multimeter to Test the Starter

To determine if the starter motor of your vehicle is functioning properly, testing it with a multimeter is essential. Follow these 6 simple steps to do so:

  1. Activate the multimeter and switch it to DC voltage mode.
  2. Connect the positive lead of the multimeter to the positive terminal on the battery and negative lead to metal body contact or chassis of your vehicle to ground them.
  3. Crank the engine for about 10 seconds while observing the voltage reading displayed on the multimeter. Observe if there are spikes or fluctuations occur during this process.
  4. If no voltage is displayed, check that all cables are connected securely and are in good condition.
  5. If voltage is displayed between 9-10 volts but does not increase, there may be an issue with the starter brushes or armature. If you observe significant fluctuations in Voltage during Starter operation, then most likely an issue with Battery Terminal Corrosion, Exhausted Battery or Grounding System Issue in Vehicles’ Electrical Circuits.
  6. If voltage increases over time indicating a gradual ‘ramp-up’, then most likely is a bad battery connection (either weak connection to terminals or sulfation), Bad Starter Cable Contacts, Loose Belt Tensioner.

It is worth noting that measuring resistance across different points known as volt drop tests can assist with understanding further faults between starter circuits along with earths and connections.

Remember that neglecting irregularities could cause significant damages to both electrical components and compromise personal safety. Grab your multimeter now and ensure a safe journey!

Get ready for an electrifying experience as we dive into testing the solenoid.

Testing the Solenoid

Testing the Starter Solenoid:

The starter solenoid is an integral part of any lawn mower starter system. It is responsible for initiating the motor’s operation by engaging the starter gear with the engine flywheel. To ensure that your lawn mower’s solenoid is in good working condition, follow the testing procedure below.

  1. Step 1: Disconnect the Battery
  2. Before inspecting the solenoid, disconnect the battery cables to avoid electrical shock.

  3. Step 2: Locate the Solenoid
  4. The solenoid is usually found on the side of the engine, behind the starter motor. Refer to the owner’s manual for your specific mower for its exact location.

  5. Step 3: Conduct Solenoid Testing
  6. Using a multimeter, conduct a continuity test by placing the meter’s positive lead on the solenoid’s output terminal and the negative lead on the housing. Press the mower starter button or turn the ignition switch to the “Start” position. If you hear a clicking sound, the solenoid is working correctly. If not, replace it with a new one.

  7. Step 4: Reconnect the Battery
  8. Once testing and replacing are complete, reconnect the battery cables to their proper terminals.

Pro Tip:

Make sure to conduct regular maintenance checks on your lawn mower’s starter system, including the solenoid, to ensure it functions correctly. This can help extend the lifespan of your mower and save you from costly repairs down the road.

Don’t be shocked if your lawn mower refuses to start – sometimes it just needs a little solenoid TLC.

Check the Solenoid Connections

To test the solenoid, it is essential to ensure that the connections are in good condition.

Here’s a 6-step guide to checking the solenoid connections:

  1. Locate the solenoid.
  2. Disconnect the wiring from the solenoid.
  3. Clean any corrosion or dirt around the terminals.
  4. Inspect the terminals for damage or wear.
  5. Reconnect the wiring to the solenoid.
  6. If needed, tighten any loose terminal connections.

Furthermore, it is crucial to ensure that all electrical components are switched off throughout the process and take safety precautions because working with electricity can be hazardous.

Remember, testing the connections of a solenoid can prevent significant problems in your equipment or vehicle. So why wait? Check them now before it is too late.

Stay safe and keep your equipment protected!

Get ready to drop some volts and take your troubleshooting skills to shockingly good levels with this simple – yet effective – voltage drop test.

Perform a Voltage Drop Test

To assess the solenoid for functionality and efficiency, it is essential to Perform a Voltage Drop Test. Follow these three steps to conduct the test:

  1. Begin by connecting the voltmeter’s positive lead to the solenoid’s power supply side and its negative lead to the solenoid terminal.
  2. Activate the circuit, measure and record the voltage of each connection.
  3. Repeat this process for all solenoid contacts.

It is crucial to note that any reading above 0.2 volts indicates a potential issue with the circuit and requires further inspection.

When implementing this test, ensure that there is no corrosion or dust on contact points as they could cause incorrect readings, leading to faulty conclusions.

A professional workshop technician once mentioned how they managed to diagnose a malfunctioning engine starter, thanks to this test – The team had exhausted all possible checks; however, a voltage drop test uncovered that an old corroded wire was causing excessive resistance in one of the electrical connections. The wire was fixed, resulting in a properly functioning engine starter.

Testing a solenoid is like playing a game of hot or not with your multimeter.

Use a Multimeter to Test the Solenoid

When examining a solenoid, it is essential to use a multimeter. The process of testing the solenoid is crucial for determining if it needs to be repaired or replaced. Here is a 6-step guide to test the solenoid accurately using a multimeter:

  1. Ensure that the multimeter is set to measure resistance.
  2. Disconnect any power source from the solenoid.
  3. Connect the multimeter probes to each of the solenoid’s terminals.
  4. A reading of 0 ohms indicates that the coil has continuity and no issues.
  5. If the displayed resistance falls outside of this range, verify that there are no loose wires or connections before replacing your solenoid
  6. If you receive an open circuit reading, then your coil needs replacements

It is always recommended to examine your manufacturer’s manual for more specific instructions.

Pro Tip: If you don’t know how to correctly use a multimeter, seek assistance from a professional who does. This can save you time and money in sneaky faults and repairs.

Before you say goodbye to your solenoid, make sure to give it a proper ‘test drive’ and avoid any unwanted breakdowns in the future.


After testing the lawn mower starter, it is essential to know whether it requires repairing or replacement. It can be concluded that the starter needs repairing if there are electricity flow and sound from it. On the other hand, if there is no movement of electricity and sound, a new starter will be required.

To test a lawn mower starter, one should follow the instructions mentioned in the previous paragraph. Here are the steps:

  1. Ensure safety and disconnect the spark plug cable.
  2. Remove the starter cover and carefully examine for rust or dirt build-up.
  3. Check all electrical wiring connections for any loose or damaged wire connections.
  4. Last but not least, connect a voltmeter and establish electricity flow by turning on the ignition switch.

It is worth mentioning that although testing may identify some issues, it is recommended to seek expert help in case of doubt as lawnmower starter repair or replacement requires expertise.

A customer once shared their experience wherein they assumed their lawn mower starter needed repair; however, upon seeking expertise, they found out that only minor adjustments were required to enhance its performance all along.

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Andrew Fisher

Andrew Fisher

Andrew is a dedicated father of three who really takes pride in his lawn and garden. You'll find Andrew behind the scenes of almost everything Edge Your Lawn produces. When he's not helping readers find all the information they need, he's in his backyard working on his lawn and garden landscaping. This year he hopes to build an outdoor deck and sort out his veg patches.

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