11 Reasons Why John Deere D110 Won’t Start(Fixed)

Having trouble starting your John Deere D110 lawn mower can be frustrating, especially when you’re ready to tackle your yard work.

However, there are several common issues that can prevent your mower from starting.

In this article, we will explore the possible causes of a John Deere D110 not starting and provide you with troubleshooting tips and solutions to get your mower up and running again.

John Deere D110 Won't Start

John Deere D110 Won’t Start

Common Causes:

  • Insufficient fuel
  • Dead or low battery
  • Faulty spark plug
  • Clogged carburetor
  • Dirty air filter
  • Malfunctioning safety switches
  • Defective ignition switch
  • Faulty solenoid
  • Failing starter motor
  • Loose or damaged wiring connections

Now, let’s explore each of these possible causes in detail and discuss how you can troubleshoot and resolve them.

1. Check the Fuel

One of the first things to check when your John Deere D110 won’t start is the fuel level.

Ensure that there is sufficient fuel in the tank and that the fuel valve is in the correct position.

If the fuel is stale or contaminated, it may prevent the engine from starting. In such cases, draining the old fuel and refilling the tank with fresh fuel is recommended.

2. Inspect the Battery

A dead or low battery can also be a reason for your John Deere D110’s starting issues. Check the battery connections for any corrosion or loose terminals.

If necessary, clean the terminals and tighten them securely. Additionally, measure the battery voltage using a multimeter.

If the voltage is below the recommended level, consider charging or replacing the battery.

Read 10 Common John Deere 185 Hydro Problems(With Solutions)

3. Examine the Spark Plug

The spark plug plays a crucial role in igniting the fuel-air mixture in the engine cylinder.

A faulty or worn-out spark plug can lead to starting problems. Remove the spark plug and inspect its condition. If it appears dirty, fouled, or damaged, it’s advisable to replace it with a new one.

Ensure the spark plug is properly gapped according to the manufacturer’s specifications.

4. Check the Carburetor

A clogged carburetor can obstruct fuel flow and prevent the engine from starting. Carefully remove the carburetor and clean it using an appropriate carburetor cleaner.

Pay attention to the small passages and jets, ensuring they are free from debris. Reassemble the carburetor and reinstall it properly.

Read John Deere 345 Fuel Pump Problems(3 Quick Ways To Fix)

5. Inspect the Air Filter

A dirty or clogged air filter can restrict airflow and affect the engine’s performance.

Remove the air filter and inspect it for dirt, debris, or damage. If necessary, clean or replace the air filter to ensure proper air circulation to the engine.

6. Verify the Safety Switches

John Deere lawn mowers are equipped with safety switches that prevent the engine from starting under certain conditions.

Check the operation of these switches, such as the seat switch, brake switch, and blade engagement switch.

Ensure they are functioning correctly and not causing any interference with the starting process.

Read John Deere 790 Problems(5 Quick Ways To Fix)

7. Examine the Ignition Switch

A faulty ignition switch can prevent the starter from receiving power, resulting in a no-start condition. Inspect the ignition switch for any signs of damage or malfunction.

If needed, replace the ignition switch with a compatible one to ensure proper electrical connection.

8. Check the Solenoid

The solenoid acts as a bridge between the battery and the starter motor. If the solenoid is defective, it may prevent the starter motor from engaging.

Inspect the solenoid connections and ensure they are tight and free from corrosion. Consider testing the solenoid using a multimeter or replacing it if necessary.

9. Inspect the Starter Motor

A failing starter motor can hinder the engine’s starting process. Check the starter motor connections for any looseness or corrosion.

If the connections are secure, but the starter motor still doesn’t function properly, it may require replacement.

Consult a professional or refer to the manufacturer’s guidelines for proper installation.

Read Best Oil for John Deere Riding Mower(Top 3 Oils)

10. Verify the Wiring Connections

Loose or damaged wiring connections can disrupt the electrical flow and prevent the mower from starting.

Inspect the wiring harness for any visible damage, loose connections, or frayed wires. If any issues are found, repair or replace the wiring as needed.

11. Clean the Fuel System

If all the above steps haven’t resolved the starting issue, it’s recommended to clean the entire fuel system thoroughly.

This process involves cleaning the fuel tank, fuel lines, and fuel filter. Remove any debris or contaminants that might be obstructing the fuel flow.

Consider using a fuel system cleaner additive to ensure optimal performance.

Read John Deere 345 Fuel Pump Problems(3 Quick Ways To Fix)

Maintenance tips for the John Deere D110

Maintenance TaskFrequency
Check engine oil levelBefore each use
Change engine oilEvery 50 hours of use or annually, whichever comes first
Clean or replace air filterAnnually or as needed, especially in dusty conditions
Inspect and clean spark plugAnnually or as needed
Check and tighten battery connectionsAnnually or as needed
Lubricate mower deck spindlesEvery 10 hours of use or annually, whichever comes first
Sharpen or replace mower bladesAs needed or when they become dull
Clean mower deckAfter each use or as needed
Inspect and adjust drive belt tensionAnnually or as needed
Check tire pressureRegularly and adjust as needed
Grease fittings (wheel bearings, pivot points)Every 25 hours of use or annually, whichever comes first
Inspect and clean fuel filterAnnually or as needed
Check and adjust engine idle speedAnnually or as needed
Store mower properlyAt the end of the mowing season or when not in use for an extended period

Read John Deere 2010 Problems(5 Quick Ways To Fix)

Final Remarks

The John Deere D110 not starting can be attributed to various causes, ranging from fuel-related issues to electrical problems.

By following the troubleshooting tips mentioned in this article, you can diagnose and resolve the problem.

However, if the issue persists or you’re unsure about performing any repairs, it’s best to consult a qualified technician or contact John Deere customer support for further assistance.

Read John Deere Low Viscosity Hy-Gard Equivalent(9 Best)


How often should I clean or replace the air filter in my John Deere D110? 

It’s recommended to clean or replace the air filter annually or more frequently if you operate the mower in dusty or dirty conditions.

Can a faulty solenoid cause other electrical issues in my lawn mower? 

Yes, a faulty solenoid can cause various electrical problems in your lawn mower, including starting issues and intermittent electrical failures.

What should I do if my John Deere D110’s battery keeps draining quickly? 

If your battery consistently drains quickly, it may indicate a charging system problem. Consider checking the alternator, voltage regulator, and battery connections for any faults.

Is it possible to clean the carburetor without removing it from the mower? 

While it’s generally recommended to remove the carburetor for a thorough cleaning, you can try using a carburetor cleaner spray to clean the exterior and openings without disassembly.

Where can I find the replacement parts for my John Deere D110?

You can find genuine John Deere replacement parts at authorized dealerships, online stores, or directly from the John Deere website.

Read 10 Common John Deere S240 Problems(With Solution)

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.