Is your Husqvarna push mower refusing to start? This can be a frustrating experience, especially when you're eager to get your lawn looking its best. This article provides 12 easy fixes and common mistakes to avoid that can help you troubleshoot why your Husqvarna push mower won't start, getting you back to mowing in no time. From checking the fuel to inspecting the spark plug, we’ll cover the most common reasons and solutions to get your mower running smoothly again.
Fuel Issues: The First Suspect
One of the most frequent reasons a Husqvarna push mower won't start is related to fuel. Fuel-related issues are common, especially if the mower has been sitting unused for a while. Let's examine some fuel-related problems and their solutions.
1. Check the Fuel Level and Quality
Start with the basics. Is there enough fuel in the tank? If the mower has been stored for a long period, the fuel may have degraded. Old fuel can become gummy and clog the carburetor. Drain the old fuel and replace it with fresh gasoline. It's recommended to use fuel stabilizer, especially when storing the mower for extended periods.
According to Husqvarna's official website, using fresh fuel is crucial for optimal engine performance. “Always use fresh, clean gasoline with a minimum octane rating of 87,” they advise.
2. Inspect the Fuel Line and Filter
The fuel line delivers fuel from the tank to the carburetor. Check for any cracks, kinks, or blockages in the fuel line. A damaged fuel line will prevent fuel from reaching the engine. Similarly, a clogged fuel filter can restrict fuel flow. Replace the fuel line or filter if necessary.
3. Clean the Carburetor
The carburetor mixes air and fuel to create a combustible mixture. If the carburetor is clogged, the engine won't receive the fuel it needs to start. Carburetor issues are a very common reason why a Husqvarna push mower won't start. You can try cleaning the carburetor yourself using carburetor cleaner, or you may need to take it to a professional for a more thorough cleaning or rebuild.
There are carburetor cleaning sprays designed to help dissolve build-up without fully disassembling the carburetor. If the problem persists, you may need to remove the carburetor and soak it in a carburetor cleaning solution.
Ignition System Problems
The ignition system is responsible for creating the spark that ignites the fuel-air mixture. If there's an issue with the ignition system, the mower won't start.
4. Examine the Spark Plug
The spark plug ignites the fuel-air mixture in the engine's cylinder. A faulty spark plug can prevent the engine from starting. Remove the spark plug and inspect it. Look for signs of damage, such as cracks or carbon buildup. Clean the spark plug with a wire brush, or replace it if necessary. Also, check the spark plug gap and adjust it to the manufacturer's specifications.
5. Check the Ignition Coil
The ignition coil provides the high voltage needed to create a spark at the spark plug. If the ignition coil is faulty, it won't generate enough voltage, and the mower won't start. Use a multimeter to test the ignition coil's resistance. If the reading is outside the manufacturer's specifications, replace the ignition coil.
Airflow Obstructions
The engine needs a proper mixture of air and fuel to run. If the airflow is restricted, the mower may not start.
6. Clean the Air Filter
The air filter prevents dirt and debris from entering the engine. A clogged air filter restricts airflow, which can prevent the mower from starting. Remove the air filter and inspect it. If it's dirty, clean it with compressed air or replace it. Refer to your Husqvarna push mower's user manual for the correct cleaning procedure.
Safety Mechanisms
Modern lawn mowers come equipped with safety features that prevent them from starting under certain conditions.
7. Check the Blade Brake Control Cable
The blade brake control (BBC) cable is a safety feature that stops the blade from spinning when you release the handle. If the BBC cable is loose, damaged, or not properly engaged, the mower may not start. Ensure the cable is properly connected and functioning correctly.
8. Ensure the Safety Bail is Engaged
Most push mowers have a safety bail that you must hold down to start and run the engine. Make sure you are holding the bail down firmly while trying to start the mower.
Starting System Issues
Problems with the starting system itself can also cause a Husqvarna push mower not to start.
9. Inspect the Starter Cord and Recoil Starter
If the starter cord is broken or damaged, you won't be able to pull it to start the engine. Inspect the starter cord for any signs of wear or damage. Also, check the recoil starter mechanism to ensure it's functioning correctly. If the cord is broken or the recoil starter is faulty, replace them.
Other Potential Problems
Sometimes the issue isn't as straightforward as fuel or ignition.
10. Check the Oil Level
Low oil levels can prevent the engine from starting. Check the oil level and add oil if necessary. Make sure to use the correct type of oil as specified in your owner's manual.
11. Examine the Flywheel Key
The flywheel key is a small component that connects the flywheel to the crankshaft. If the flywheel key is sheared, the engine won't start. Inspect the flywheel key and replace it if necessary.
12. Seek Professional Help
If you've tried all the above fixes and your Husqvarna push mower still won't start, it may be time to seek professional help. A qualified mechanic can diagnose and repair more complex issues.
By systematically checking these areas, you can often diagnose and fix the problem yourself, saving time and money. Remember to always consult your owner's manual for specific instructions and safety precautions related to your model. Regularly maintaining your mower, including changing the oil, cleaning the air filter, and using fresh fuel, can prevent many starting problems in the first place.
If you're still having trouble, don't hesitate to contact a qualified Husqvarna service technician for assistance.
