The sweet hum of a well-maintained lawnmower, the satisfying scent of freshly cut grass, and the feeling of a job well done – these are the joys of owning a Craftsman push mower. But what happens when that familiar hum turns into a frustrating sputter and your lawnmower refuses to start? Don’t worry! This comprehensive guide will walk you through the process of troubleshooting and starting your Craftsman push mower, ensuring you can tackle your lawn with ease.
Starting a Craftsman push mower, while seemingly simple, often involves a few essential steps. This article will delve into the most common reasons why your mower might not be starting, and equip you with the necessary knowledge and tips to get it running smoothly. From checking the fuel and spark plug to understanding the ignition system and safety precautions, we’ll cover everything you need to know.
Understanding the Fundamentals
Before diving into troubleshooting, let’s grasp the fundamental components that make your Craftsman push mower run:
- Engine: The heart of your mower, responsible for power and motion.
- Fuel System: Delivers fuel to the engine, ensuring a steady combustion.
- Ignition System: Creates a spark to ignite the fuel-air mixture within the engine.
- Air Intake System: Supplies the engine with fresh air for combustion.
- Exhaust System: Releases combustion byproducts from the engine.
Essential Tools & Materials
Having the right tools on hand makes starting your mower a breeze. You’ll likely need:
- A Phillips Screwdriver: To remove and replace spark plugs.
- A Wrench: To tighten and loosen nuts and bolts.
- A Small Container: For collecting excess fuel or cleaning solutions.
- A Rag: For wiping off spills and cleaning parts.
- Fuel: Fresh, high-octane gasoline is best.
- Spark Plug Wrench: To remove and replace spark plugs.
- Safety Glasses: To protect your eyes from debris.
- Gloves: To protect your hands from grime and potential fuel spills.
Safety First
Always prioritize safety when working with any engine. Here are some essential precautions:
- Never start or run the engine in a closed area. Mower exhaust can be toxic.
- Always wear eye protection. Flying debris and fuel can be dangerous.
- Be aware of your surroundings. Ensure no children or pets are nearby.
- Avoid wearing loose clothing. It can get caught in moving parts.
- Disengage the blade before starting the engine.
Troubleshooting: Why Won’t My Mower Start?
Now, let’s tackle the most common reasons why your Craftsman push mower might be refusing to cooperate:
1. No Fuel or Bad Fuel
The most straightforward reason for a no-start is a lack of fuel or old, stale fuel.
Checking the Fuel Tank
- Open the fuel cap and visually inspect the fuel level. A full tank is ideal, but at least half-full should be sufficient.
- If the tank is empty, add fresh fuel. Avoid using gasoline that’s more than 30 days old, as it can deteriorate.
- If the tank is full but the mower won’t start, suspect stale fuel.
Replacing the Fuel
- Drain the old fuel from the tank.
- Clean the tank and cap with a rag.
- Fill the tank with fresh, high-octane gasoline.
2. Clogged Fuel Lines
Fuel lines can become clogged over time, preventing fuel from reaching the engine.
Inspecting the Fuel Lines
- Locate the fuel lines. They connect the fuel tank to the carburetor.
- Visually inspect the lines. Look for any kinks, cracks, or signs of blockage.
- Carefully trace the lines. Ensure there are no obstructions or pinch points.
Cleaning the Fuel Lines
- Use a small wire or a thin piece of string to clear any blockages.
- If the lines are severely clogged, replacement might be necessary.
3. Spark Plug Issues
A faulty or fouled spark plug can prevent the ignition system from generating the spark needed to start the engine.
Inspecting the Spark Plug
- Locate the spark plug. It’s usually near the top of the engine, often attached to a spark plug wire.
- Remove the spark plug using a spark plug wrench.
- Examine the spark plug for signs of fouling, wear, or damage.
Cleaning or Replacing the Spark Plug
- If the spark plug is fouled, clean it with a wire brush.
- If the spark plug is worn or damaged, replace it with a new one of the correct type.
4. Air Filter Issues
A dirty air filter can restrict airflow to the engine, making it difficult to start.
Inspecting the Air Filter
- Locate the air filter. It’s usually located near the carburetor.
- Remove the air filter cover and inspect the filter.
- Look for dirt, debris, or signs of oil build-up.
Cleaning or Replacing the Air Filter
- If the filter is dirty, clean it by tapping or brushing off loose debris.
- For reusable filters, wash them with mild soap and water.
- If the filter is damaged or beyond cleaning, replace it with a new one.
5. Carburetor Problems
A dirty or malfunctioning carburetor can affect the fuel-air mixture, leading to starting problems.
Identifying Carburetor Issues
- Look for signs of fuel leaks, a flooding engine, or a rough idle.
- Inspect the carburetor for dirt, debris, or signs of damage.
Cleaning the Carburetor
- For mild dirt build-up, try cleaning the carburetor with a carburetor cleaner.
- For more extensive issues, consider taking the carburetor to a professional for cleaning or rebuilding.
Starting Your Craftsman Push Mower
Once you’ve addressed any potential issues, it’s time to start your mower:
1. Prepare the Mower
- Make sure the blade is disengaged.
- Ensure the fuel tank is at least half-full with fresh gasoline.
- If necessary, prime the carburetor by pressing the primer bulb several times.
- Set the choke lever to the “choke” position if it’s cold.
2. Start the Engine
- Hold the mower in place and press the starter lever.
- If the mower doesn’t start immediately, don’t keep pressing the starter lever continuously.
- Try again after a few seconds.
3. Adjust the Choke
- Once the engine starts, gradually move the choke lever to the “run” position.
- Allow the engine to warm up for a few minutes before using the mower.
Maintenance Tips for Smooth Starting
- Regularly check and clean the air filter.
- Change the spark plug at least once per season.
- Use a fuel stabilizer to prevent fuel from deteriorating.
- Store the mower properly during the off-season.
- Have the carburetor cleaned and adjusted by a professional every couple of years.
Conclusion
Starting a Craftsman push mower should be a straightforward process. By understanding the common reasons for starting problems and following the troubleshooting steps outlined in this guide, you can confidently address any issues and get your mower running smoothly in no time. Remember to prioritize safety and always consult with a professional mechanic for any complex repairs. With a little care and attention, your Craftsman push mower will be ready to conquer your lawn season after season.
FAQ
1. How do I check the fuel in my Craftsman push lawnmower?
Many Craftsman push mowers have a fuel gauge located on the side of the fuel tank. If yours doesn’t have a gauge, you can visually check the fuel level by looking at the tank’s transparent side. If you see that the fuel is low, add gasoline to the tank. Be sure to use fresh gasoline as old gas can clog the carburetor.
2. What kind of gasoline should I use for my Craftsman push lawnmower?
For best performance and to avoid damage to your engine, use unleaded gasoline with an octane rating of 87 or higher. Do not use gasohol or any gasoline containing ethanol. These additives can damage the carburetor and other internal parts of your engine.
3. Why won’t my Craftsman push lawnmower start?
There are several reasons why your Craftsman push lawnmower might not start. First, check if there is enough fuel in the tank. If there is fuel, make sure the fuel lines are not clogged. Next, check the spark plug to see if it’s sparking. If it’s not, you might need to clean or replace it. Finally, check the air filter. A dirty air filter can restrict airflow and prevent the engine from starting.
4. How do I prime my Craftsman push lawnmower?
To prime your Craftsman push lawnmower, you’ll need to use the primer bulb. This is usually a small, rubber bulb located on the carburetor. To prime the engine, press the primer bulb repeatedly until you see fuel in the carburetor. This will help get fuel into the engine and make it easier to start.
5. How do I adjust the height of the blades on my Craftsman push lawnmower?
The height of the blades on your Craftsman push lawnmower is usually adjusted with a lever located near the wheels. To raise or lower the blades, simply move the lever to the desired position. Once the lever is in place, make sure that all four wheels are touching the ground evenly.
6. How do I clean my Craftsman push lawnmower after use?
After mowing, it is important to clean your Craftsman push lawnmower to prevent dirt and debris from accumulating. First, unplug the spark plug wire to prevent accidental starting. Then, use a brush or a vacuum cleaner to remove any grass clippings or dirt from the mower deck. Be sure to clean the air filter regularly as well.
7. How do I winterize my Craftsman push lawnmower?
To winterize your Craftsman push lawnmower, first, drain the fuel tank. Then, run the engine until it runs out of gas to clear any remaining fuel in the carburetor. Next, remove the spark plug and add a small amount of oil to the cylinder to prevent rust. Finally, store the mower in a dry place out of direct sunlight. By following these steps, you can ensure that your lawnmower is properly winterized and will be ready for use next spring.