Toro 21386 Problems(3 Quicks Ways To Fix)

The Toro 21386 is a popular lawn mower known for its durability and efficiency in maintaining a well-groomed lawn.

However, like any other mechanical equipment, it may encounter occasional problems that can hinder its performance.

In this post, we will discuss some common issues faced by Toro 21386 owners and provide troubleshooting tips and solutions to help you resolve them effectively.

Let’s dive in.

Toro 21386 Problems

1. Engine Starting Issues

Spark Plug Problems

One of the most common problems encountered by Toro 21386 owners is difficulty starting the engine.

In many cases, this issue can be traced back to a faulty or dirty spark plug. The spark plug plays a crucial role in igniting the fuel mixture inside the engine cylinder.

Over time, it can become fouled with carbon deposits, affecting its performance. To troubleshoot this problem, follow these steps:

  • Locate the spark plug on the engine.
  • Remove the spark plug using a spark plug wrench.
  • Inspect the spark plug for signs of fouling or damage.
  • Clean the spark plug with a wire brush or replace it if necessary.
  • Reinstall the spark plug and ensure it is tightened properly.

Fuel System Troubles

Another potential cause of engine starting issues is a problem with the fuel system.

If the fuel is old or contaminated, it can hinder the engine’s ability to start smoothly.

To address this problem, consider the following steps:

  • Drain the old fuel from the fuel tank.
  • Refill the tank with fresh, clean gasoline.
  • Check the fuel filter for clogs and replace it if necessary.
  • Prime the engine by pressing the primer bulb several times.
  • Attempt to start the engine again.

Read How to Start a Toro Lawn Mower without Primer(step by Step)

How To Fix Toro 21386 Problems

1. Engine Starting Issues

Spark Plug Problems

If you continue to face difficulties starting the engine after cleaning or replacing the spark plug, it is advisable to consult a professional technician.

They will have the necessary expertise and tools to diagnose and fix any underlying issues with the ignition system.

Fuel System Troubles

In case the engine still fails to start after addressing the fuel-related problems, it is recommended to contact an authorized Toro service center.

They can perform a comprehensive inspection of the fuel system and make the necessary repairs or adjustments.

2. Poor Cutting Performance

Dull Blades

One of the primary causes of poor cutting performance is dull blades. Over time, the blades can become worn or develop nicks, resulting in an uneven and unsatisfactory cut. Here’s how you can resolve this problem:

  • Disconnect the spark plug wire to ensure safety.
  • Remove the cutting blade from the mower deck.
  • Inspect the blade for signs of wear or damage.
  • Sharpen the blade using a file or a bench grinder.
  • Reinstall the blade securely on the mower deck.

Uneven Cutting

If your Toro 21386 is leaving patches of uncut grass or cutting the lawn unevenly, it might be due to an improper cutting height adjustment or a bent blade.

Follow these steps to rectify the issue:

  • Park the mower on a flat surface and disconnect the spark plug wire.
  • Check the cutting height adjustment mechanism and ensure it is properly set.
  • Inspect the blades for any bends or damage; replace if necessary.
  • Adjust the blade alignment according to the manufacturer’s instructions.
  • Test the mower by cutting a small area of grass to verify the evenness.

Read How to Charge Toro Electric Start Mower(In 5 Steps)

3. Excessive Vibration

Loose or Damaged Parts

Excessive vibration during operation can be a result of loose or damaged components in the mower.

To eliminate this problem, take the following steps:

  • Turn off the mower and disconnect the spark plug wire.
  • Inspect the cutting deck, blade assembly, and other relevant parts for any loose fasteners.
  • Tighten any loose screws, bolts, or nuts using the appropriate tools.
  • Replace any damaged parts, such as worn-out belts or pulleys.
  • Conduct a test run to ensure that the vibration has been minimized.

Unbalanced Cutting Deck

An unbalanced cutting deck can also contribute to excessive vibration.

To address this issue, follow these steps:

  • Park the mower on a flat surface and disconnect the spark plug wire.
  • Examine the cutting deck for any debris or grass clippings that may be causing an imbalance.
  • Clean the deck thoroughly and remove any obstructions.
  • Check the deck for signs of damage or warping; repair or replace as needed.
  • Reinstall the deck and ensure it is securely attached to the mower.

Read 7 Toro V-Twin 708cc Engine Problems(With Solutions)

Final Remarks

The Toro 21386 is an excellent lawn mower that can encounter a few problems during its lifespan.

By following the troubleshooting tips and solutions provided in this article, you can overcome common issues like engine starting difficulties,

poor cutting performance, excessive vibration, loss of power, overheating, and uneven height adjustment.

Regular maintenance and prompt resolution of problems will help ensure that your Toro 21386 continues to deliver optimal performance for years to come.

Read How to Charge Toro Electric Start Mower(In 5 Steps)


How often should I sharpen the mower blades?

It is recommended to sharpen the mower blades at least once a season or more frequently if you notice a decline in cutting performance.

Sharp blades ensure a clean and precise cut, promoting a healthier lawn.

Why does my Toro 21386 vibrate excessively?

Excessive vibration can result from loose or damaged parts, such as fasteners, belts, or pulleys.

Additionally, an unbalanced cutting deck can also contribute to vibration-related issues.

Can I use ethanol-blended fuel in my Toro 21386?

Yes, you can use ethanol-blended fuel (E10) in your Toro 21386. However, it is important to follow the manufacturer’s recommendations regarding the maximum ethanol concentration and use a fuel stabilizer to prevent fuel-related problems.

Read Can I Use Trufuel in My Lawn Mower(5 Benefits)

How do I clean the air filter of the lawn mower?

To clean the air filter of your Toro 21386, follow these steps:

  • Locate the air filter housing.
  • Remove the cover or housing.
  • Take out the air filter.
  • Tap the filter gently to remove loose dirt and debris.
  • If necessary, wash the filter with warm, soapy water.
  • Rinse thoroughly and allow the filter to dry completely.
  • Reinstall the air filter and secure the housing.

What should I do if my Toro 21386 does not start?

If your Toro 21386 fails to start, first check the spark plug for fouling or damage. Clean it or replace it if necessary.

Next, ensure the fuel system is free from contaminants and the fuel is fresh.

If the problem persists, seek assistance from a professional technician or an authorized Toro service center.

Read How to Start Mower After Running Out of Gas(5 Tips)

George Bill
George Bill

George Bill is a Mechanical Engineer by Profession and an avid gardener and has been mowing his lawn for over 20 years. He has used a variety of different mowers during this time.
George is an expert at maintaining his mowers and over the years, he has learned many tricks and techniques for getting the best results from his mowers and is always happy to share his knowledge on this site.