Cobra Lawn Mower Problems : 5 Common Issues (Explained)

Cobra lawn mowers are renowned for their dependable and high performance. These lawn mowers are designed to make lawn maintenance as easy and enjoyable as possible, but just like any other piece of equipment they can encounter problems and in this article we’ll be taking a look at some of these problems. So if you own a Cobra lawnmower or are thinking of getting one then this article is for you. Let’s get into it.

Table of Contents

What Are Cobra Lawn Mowers?

Cobra lawn mowers are a good choice for homeowners looking to keep a good and lush lawn. These lawn mowers are known for their dependability, cutting efficiency and durability as well. With a range of models available, Cobra offers options for both small residential lawns and large commercial properties. Whether you opt for a petrol or electric model, Cobra lawn mowers are designed to deliver near perfect performance in maintaining a healthy and well-manicured lawn.

Cobra Lawn Mower Problems

1. Difficultly Starting Engine

One of the most common problems encountered with Cobra lawn mowers is difficulty in starting the engine. This can be frustrating especially when you’re ready to tackle your lawn. If you’re experiencing starting issues then it may be due to;

  • A faulty spark plug
  • Low fuel levels
  • A clogged air filter

Troubleshooting The Difficulty Starting Engine Problem

  • First make sure that the spark plug is clean and properly connected because with time the spark plug can become fouled with debris or lose its connection.
  • Also check the fuel level and make sure the fuel is fresh as stale fuel can cause starting issues so it’s important to use fresh fuel and store it properly.
  • Inspect the air filter and clean or replace it if necessary because a clogged air filter can restrict airflow and prevent the engine from starting smoothly.

2. Engine Running Rough or Stalling

If your Cobra lawn mower’s engine is running rough or stalling during operation there may be some underlying issues that needs to be addressed like;

  • A clogged carburetor
  • A faulty ignition
  • A clogged fuel filter/line

Troubleshooting The Engine Running Rough or Stalling Problem

The carburetor is responsible for mixing air and fuel in the correct amouny for combustion but with time, dirt and debris can accumulate in the carburetor affecting its performance.

  • Be sure to cleaning or replacing the carburetor can often resolve engine problems.
  • If the ignition coil is faulty then it can cause misfires or prevent the engine from starting altogether. Be sure to replace the ignition coil can help resolve these problems.
  • Check the fuel filter and fuel lines for any blockages or damage because clogged fuel filter or damaged fuel lines can restrict fuel flow and cause engine performance issues.

3. Cutting Issues

If your Cobra lawn mower is not cutting grass evenly or leaving behind uncut patches, there are a few reasons why like;

  • A dull or misaligned blade
  • A faulty mower deck

Troubleshooting Cutting Issue

  • Check the cutting blade to ensure it is sharp and properly aligned because a dull or misaligned blades can result in an uneven cut.
  • You should sharpen or replace the blade as needed, and make sure it is securely fastened to the Cobra lawn mower.
  • Inspect the lawn mower deck for any debris buildup or damage because accumulated grass clippings or debris can obstruct the cutting blade and affect its performance.
  • Clean the lawn mower deck thoroughly and remove any obstructions.
  • Also adjust the cutting height to the desired level because cutting grass too low can put stress on the lawn mower and result in an uneven cut.
  • Follow the recommendations in the user manual for the appropriate cutting height for your specific Cobra lawn mower model.

4. Fuel And Oil-Related Problems

Problems related to fuel and oil can also impact the performance of your Cobra lawn mower. If your mower is not starting or running properly, it’s important to check;

  • The fuel levels/ cleanliness
  • The oil levels/ cleanliness

Troubleshooting Fuel And Oil-Related Problems

Low oil levels can cause engine damage, while stale or contaminated fuel can lead to starting or performance issues.

  • Always use fresh, clean fuel and store it properly, also avoid using fuel that has been sitting for extended periods or contains excessive moisture.
  • Alsl check the oil regularly and change it according to the manufacturer’s recommendations because regular oil changes help maintain the lawn mower engine’s lubrication and prevent excessive wear.

5. Maneuverability Problems

If you’re experiencing difficulties maneuvering your Cobra lawn mower, then it may be due to;

  • Damaged wheels
  • A faulty handlebar

Troubleshooting Maneuverability Problems

  • First you should check the wheels to ensure they are properly aligned and not damaged because damaged wheels can affect the lawn mower’s stability and make it harder to maneuver.
  • Check the handlebar and make sure it is securely fastened to the lawn mower. Loose or damaged handlebars can make it difficult to control the lawn mower, especially when navigating tight turns or uneven terrain. You should tighten or replace the handlebar as needed to improve maneuverability.

How To Avoid Cobra Lawn Mower Problems

  • First read the Cobra lawn mower’s user manual carefully and familiarize yourself with the maintenance requirements and recommended tips for your specific model.
  • Be sure to regularly inspect and clean the mower and pay attention to the air filter, spark plug and cutting blade.
  • Also perform regular oil changes and use the recommended type and grade of oil.
  • Keep the fuel tank clean and use fresh fuel.
  • Store your Cobra lawn mower in a dry, sheltered area to protect it from the elements.
  • You should also have routine maintenance checks with a qualified technician to diagnose and address any potential issues before they become major problems.

How Often Should I Sharpen The Cutting Blade On My Cobra Lawn Mower?

It will depend on several factors like; the size of your lawn, the type of grass and the cutting conditions. But it is highly recommended to sharpen the blade at least once a mowing season or whenever you notice a decrease in cutting performance. Regular blade sharpening ensures a clean and precise cut.

Can I Use Ethanol-Blended Fuel In My [Gas-Powered] Cobra Lawn Mower?

Ethanol-blended fuels such as E10 (10% ethanol) or E15 (15% ethanol) are widely available in many regions. While Cobra lawn mowers are compatible with ethanol-blended fuels, it is very important to use them in moderation. Ethanol can attract moisture and lead to fuel contamination or deterioration.


Owning a Cobra lawn mower comes with the assurance of quality and performance. However, like any other lawn mower you may get in the market it may encounter problems. Remember to perform regular maintenance, use the recommended fuel type and oil, and handle the lawn mower with care. With thay your Cobra lawn mower will continue to deliver exceptional cutting results and thus making lawn care a relatively easier task.