The warm weather is finally here, and you’re ready to get your lawn looking pristine. But when you go to fire up your Craftsman M250 lawn mower, it just sits there, silent. Don’t worry! A little troubleshooting can often get your mower running smoothly. This comprehensive guide will walk you through the steps to diagnose and fix common starting problems with your Craftsman M250, from basic checks to more advanced solutions.
A Quick Overview
The Craftsman M250 is a reliable and popular lawn mower, but like any machine, it needs proper maintenance and care to run efficiently. Starting issues with the Craftsman M250 can stem from a variety of causes, including a lack of fuel, a clogged air filter, a faulty spark plug, or a dead battery (if your mower is electric). This article will cover each of these common causes in detail, providing step-by-step instructions to help you get your lawn mower running again.
Checking the Basics: Fuel, Spark, and Air
Before diving into more complex troubleshooting, start with the fundamentals. These basic checks can often pinpoint the problem quickly.
1. Fuel: Is the Tank Full and Fresh?
A simple lack of fuel is a common reason for a mower to refuse to start.
- Check the Fuel Level: Look at the fuel gauge or visually inspect the tank. Is it empty or nearly empty?
- Check the Fuel Freshness: Old, stale gasoline can gum up the engine and prevent it from starting. If you’ve had fuel in the tank for a long time, it’s best to drain it and refill with fresh, high-quality gasoline.
- Prime the Engine: Most Craftsman M250 models have a primer bulb. If you haven’t used the mower in a while, prime the engine by squeezing the bulb several times to fill the carburetor with fuel.
2. Spark Plug: Is It Sparking?
The spark plug is essential for igniting the fuel-air mixture in the engine.
- Inspect the Spark Plug: Remove the spark plug (make sure the engine is off and cooled down) and inspect it for damage, wear, or carbon buildup. A clean spark plug is crucial for proper ignition.
- Test the Spark Plug: To test the spark plug, connect it to the spark plug wire and hold it close to a grounded metal surface (like the engine block). While someone cranks the engine, you should see a spark jump between the spark plug electrode and the metal surface.
3. Air Filter: Is It Clean?
A dirty air filter restricts airflow, making it difficult for the engine to get the oxygen it needs to run.
- Inspect the Air Filter: Remove the air filter and inspect it for dirt, dust, or debris. If it’s dirty, replace it with a new filter.
- Clean the Air Filter: If the air filter is washable, clean it with soap and water, making sure to allow it to dry completely before reinstalling it.
Diagnosing More Complex Issues
If the basic checks haven’t resolved the problem, it’s time to look at more complex issues.
1. Fuel System Problems: More Than Just the Tank
The fuel system, beyond the tank, can cause starting problems.
- Clogged Fuel Line: A clogged fuel line restricts fuel flow to the engine. This can happen over time due to fuel deposits or debris.
- Faulty Fuel Pump: The fuel pump is responsible for pushing fuel from the tank to the carburetor. A failing fuel pump can prevent fuel from reaching the engine.
- Dirty Carburetor: A dirty carburetor can become clogged with fuel deposits, impeding fuel flow and causing starting issues.
Troubleshooting Fuel System Issues
- Inspect Fuel Lines: Visually inspect the fuel lines for any signs of blockage or damage.
- Test Fuel Pump: If you suspect a faulty fuel pump, you can test it by listening for the pump to activate when the engine is cranked.
- Clean the Carburetor: This is a more involved process that usually requires specialized tools and knowledge. If you’re not comfortable cleaning a carburetor yourself, it’s best to take it to a professional mechanic.
2. Electrical System Malfunctions: Beyond the Spark Plug
Beyond a faulty spark plug, electrical issues can prevent your mower from starting.
- Dead Battery: This is common for electric mowers, but even gas-powered mowers use batteries for the ignition system.
- Faulty Ignition Coil: The ignition coil generates the high voltage needed for the spark plug. A failing ignition coil will prevent the spark plug from firing.
- Broken or Corroded Wires: Damaged or corroded wiring can disrupt the flow of electricity, preventing the engine from starting.
Troubleshooting Electrical Issues
- Check the Battery: If your mower has a battery, test it with a multimeter or jump-start it to see if it has enough power.
- Test the Ignition Coil: You can test the ignition coil using a multimeter or a spark tester.
- Inspect Wiring: Check the wiring for any signs of damage, corrosion, or loose connections. Tighten any loose connections and replace any damaged wires.
Preventing Starting Problems: Regular Maintenance
Keeping your Craftsman M250 lawn mower in good condition can prevent starting problems and prolong its life.
- Regularly Change the Oil: Following the manufacturer’s recommendations for oil changes helps ensure proper lubrication and prevent engine wear.
- Replace Air Filter: Change or clean the air filter regularly to ensure proper airflow and prevent engine damage.
- Replace Spark Plug: Replace the spark plug according to the manufacturer’s recommended schedule.
- Clean and Store Properly: After each use, clean your mower, remove any debris from the cutting deck, and store it in a dry, covered location. This helps prevent rust and corrosion.
Getting Expert Help When Needed
While this guide provides a comprehensive overview of troubleshooting starting problems on your Craftsman M250, sometimes you need expert assistance. If you’re still having trouble starting your mower after trying these solutions, consider these options:
- Consult Your Owner’s Manual: Your owner’s manual can provide more specific troubleshooting tips and instructions for your particular Craftsman M250 model.
- Contact Craftsman Customer Support: Craftsman offers customer support resources, including online forums, phone lines, and email support. They can provide guidance or refer you to an authorized repair center.
- Take it to a Professional: If you’re not comfortable performing advanced repairs or if you suspect a serious issue, it’s best to take your mower to a qualified small engine repair shop. They have the tools, expertise, and experience to diagnose and fix problems efficiently.
Conclusion
Starting problems with your Craftsman M250 lawn mower can be frustrating, but with this guide, you have the knowledge and tools to troubleshoot and fix the problem yourself. From checking basic fuel, spark, and air systems to diagnosing more complex electrical and fuel system issues, this guide provides a roadmap for getting your mower running again. Remember to perform regular maintenance to prevent future problems and keep your Craftsman M250 running smoothly for years to come. By following these steps, you can enjoy a beautiful lawn all summer long!
Frequently Asked Questions
1. What type of fuel does the Craftsman M250 use?
The Craftsman M250 uses regular unleaded gasoline. It’s crucial to use the correct fuel type, as using the wrong fuel can damage the engine. Avoid using fuel that has been sitting for a long time, as it can become stale and gum up the engine. Always add fuel stabilizer to the gasoline to prevent it from going bad quickly.
2. Where do I find the spark plug on the Craftsman M250?
The spark plug is located on the top of the engine, under a small metal cover. You’ll need to remove this cover to access the spark plug. To reach it, you’ll need a spark plug wrench. This is a specialized tool that fits onto the spark plug and allows you to loosen and tighten it.
3. How do I check the oil level in the Craftsman M250?
The oil level can be checked by removing the dipstick located on the side of the engine. Wipe the dipstick clean and insert it fully back into the engine. Pull it back out and check the oil level. It should be between the “Full” and “Low” marks. If the oil level is low, add oil until it reaches the “Full” mark.
4. What kind of oil should I use in the Craftsman M250?
You should use 4-stroke oil designed for lawn mowers. The recommended type of oil will be specified in the owner’s manual. Using the wrong type of oil can damage the engine. Check the owner’s manual for the recommended viscosity for your model.
5. How do I adjust the cutting height on the Craftsman M250?
The cutting height on the Craftsman M250 is adjustable using a lever located on the side of the mower deck. Each position on the lever corresponds to a different cutting height. To adjust the height, simply move the lever to the desired position. The owner’s manual will outline the cutting height options for your model.
6. What should I do if the Craftsman M250 won’t start?
If your Craftsman M250 won’t start, there are a few things you can try. First, ensure the fuel tank is full of fresh gasoline. Next, check the spark plug to see if it’s dirty or damaged. You can also check the air filter to ensure it’s not clogged. If the engine still won’t start, you may need to consult a repair manual or take it to a professional.
7. How do I properly maintain the Craftsman M250?
Regular maintenance is crucial to ensuring your Craftsman M250 runs smoothly and lasts longer. This includes checking the oil level before each use, changing the oil and air filter periodically, cleaning the spark plug, and sharpening the blades. Follow the maintenance schedule outlined in the owner’s manual for best results. You should also check for any damage or wear and tear on the mower and replace any parts as needed.