Starting a lawnmower can sometimes feel like a wrestling match you’re destined to lose. But before you throw in the towel (or the pull cord), understanding why your lawnmower won’t start can save you time, money, and frustration. This guide, with insights from industry experts, will walk you through common reasons for starting problems and offer solutions to get your mower running smoothly again.
Common Reasons Your Lawnmower Won’t Start
There are several culprits behind a stubborn lawnmower. Let’s break down the most frequent issues:
1. Fuel Problems: The Empty Tank and Beyond
- Out of Gas: It might seem obvious, but ensure your gas tank isn’t empty. Even a small amount of fuel might not be enough to reach the engine.
- Old or Stale Gas: Gasoline degrades over time, especially if it contains ethanol. Stale gas can clog the carburetor and prevent the engine from starting. Drain old fuel and refill with fresh gasoline. Consider using a fuel stabilizer to extend the life of your fuel.
- Clogged Fuel Filter: A dirty fuel filter restricts fuel flow to the engine. Replace the fuel filter regularly, especially if you’re using fuel that might contain debris.
- Clogged Carburetor: The carburetor mixes air and fuel for combustion. If it’s clogged with gummed-up fuel residue, cleaning or rebuilding it might be necessary.
2. Spark Plug Issues: Igniting the Problem
- Dirty or Worn Spark Plug: The spark plug ignites the air-fuel mixture in the engine. A fouled or worn spark plug won’t create a strong enough spark. Clean or replace the spark plug as needed.
- Loose Spark Plug Wire: A loose or disconnected spark plug wire prevents electricity from reaching the spark plug. Ensure the wire is securely connected.
- Faulty Ignition Coil: The ignition coil provides the high voltage needed for the spark plug. If it’s malfunctioning, the engine won’t start. Testing the ignition coil with a multimeter can confirm if it’s the issue.
3. Air Filter Obstruction: Suffocating the Engine
- Dirty Air Filter: A clogged air filter restricts airflow to the engine, leading to a rich fuel mixture that prevents combustion. Clean or replace the air filter regularly.
4. Safety Features: Protecting You and Your Mower
- Dead Man’s Switch: Many mowers have a safety switch that engages when the operator releases the handle. Ensure this switch is functioning correctly.
- Blade Engaged: Some mowers won’t start if the blade is engaged. Disengage the blade before attempting to start.
5. Battery Problems (for Electric Mowers): Powering Up the Start
- Low Battery: If you have an electric mower, a low or dead battery will prevent it from starting. Charge the battery fully before use.
- Battery Connection: Check the battery terminals for corrosion or loose connections. Clean the terminals and ensure they are securely attached.
Expert Advice on Lawnmower Longevity and Replacement
According to Justin Urbanek, Product Manager for John Deere residential zero-turn mowers, a lawnmower typically lasts 10 to 15 years with regular maintenance. He suggests considering the manufacturer’s warranty as an indicator of expected lifespan. Angie Hicks, co-founder of Angi, advises replacing a mower over ten years old that requires major repairs like a new engine or transmission. Weigh the cost of a new mower against the repair costs and the value of your current mower.
Electric vs. Gas: Do Electric Mowers Perform as Well?
Urbanek confirms that electric mowers often perform comparably to gas-powered models, with the added benefit of reduced maintenance. Ensure the battery capacity suits your lawn size and that the mower’s specifications, such as water resistance, meet your needs.
Conclusion: Getting Your Lawnmower Back in Action
By systematically checking these common problem areas, you can often diagnose and fix the issue preventing your lawnmower from starting. Remember to consult your owner’s manual for specific instructions related to your mower model. If you’re still struggling, seeking professional help from a qualified small engine repair technician is always a good option. A well-maintained lawnmower will provide years of reliable service, keeping your lawn looking its best.
