The warm weather is finally here, and you’re itching to get your lawn looking pristine. But when you pull the cord on your trusty Craftsman mower, all you get is a deafening silence. Frustration sets in – why won’t it start? This article will explore the most common reasons your Craftsman lawnmower might be refusing to cooperate, offering solutions and troubleshooting tips to get you back on track to a perfectly manicured lawn.
In short, a Craftsman lawnmower won’t start for a multitude of reasons, from simple fuel-related issues to more complex engine problems. This guide will help you identify the likely culprit and get your mower back in action.
Fuel Problems: The Most Common Culprit
The most common reason your Craftsman mower won’t start is a fuel-related issue. Gas goes bad over time, especially in small engines. Here’s how to diagnose and address fuel-related problems:
1. Check for Fresh Fuel
- Problem: Old or stale gasoline can clog the carburetor and prevent the engine from starting.
- Solution: Drain the old fuel from the tank and replace it with fresh, high-octane gasoline.
- Important: Never store gasoline in a lawnmower tank for extended periods. If you’re storing your mower for the winter, always drain the tank completely.
2. Inspect the Fuel Line
- Problem: A cracked or kinked fuel line can prevent fuel from reaching the carburetor.
- Solution: Visually inspect the fuel line for any damage. If you find any cracks or kinks, replace the line.
- Tip: If the fuel line is old, it’s a good idea to replace it even if it doesn’t appear damaged.
3. Clean the Carburetor
- Problem: A dirty carburetor can prevent the proper flow of fuel and air to the engine.
- Solution: Remove the carburetor and clean it thoroughly with carburetor cleaner. There are detailed guides online for cleaning a specific model of Craftsman mower carburetor.
- Caution: This process can be intricate. If you are uncomfortable working with small engine components, consider taking your mower to a qualified mechanic.
Spark Problems: The Engine’s Ignition System
If your fuel system is clean and functioning properly, the next place to look is the ignition system, which is responsible for igniting the fuel mixture.
1. Check the Spark Plug
- Problem: A fouled or worn-out spark plug can prevent the engine from igniting.
- Solution: Remove the spark plug and inspect it. Look for any signs of damage, erosion, or black soot. If the spark plug is damaged or worn, replace it with a new one.
- Tip: You can test the spark plug by connecting it to the spark plug wire and grounding it against the engine block. If you see a strong blue spark, the spark plug is working.
2. Inspect the Spark Plug Wire
- Problem: A damaged or cracked spark plug wire can prevent electricity from reaching the spark plug.
- Solution: Inspect the spark plug wire for any signs of damage. If you find any cracks or frayed wires, replace the wire.
3. Check the Ignition Coil
- Problem: A faulty ignition coil can prevent the spark plug from receiving a spark.
- Solution: You can test the ignition coil with a multimeter. If the coil is not producing a spark, it needs to be replaced.
Other Possible Issues
While fuel and spark problems are the most common reasons for a lawnmower not starting, other factors could be preventing your Craftsman from firing up.
1. Air Filter
- Problem: A clogged air filter restricts airflow to the engine, making it difficult to start.
- Solution: Remove the air filter and clean it with a brush or compressed air. If the filter is severely damaged, replace it with a new one.
2. Engine Oil
- Problem: Low or dirty engine oil can cause engine damage and prevent it from starting.
- Solution: Check the oil level and top it off if necessary. If the oil is dirty, change it according to the manufacturer’s recommendations.
3. Starter Rope
- Problem: A worn-out or tangled starter rope can make it difficult to pull the cord and engage the engine.
- Solution: If the rope is worn or frayed, replace it. If it’s tangled, carefully untangle it and make sure it’s fully retracted.
4. Battery (For Electric Start Models)
- Problem: A dead or weak battery can prevent the electric starter from engaging.
- Solution: Check the battery voltage with a multimeter. If it’s below the manufacturer’s recommended voltage, charge or replace the battery.
Professional Help
If you’ve checked all the above components and your Craftsman lawnmower still won’t start, it’s time to call in a professional. A qualified mechanic can diagnose more complex engine issues like:
- Compression Problems: Low compression can prevent the engine from starting.
- Valve Issues: Faulty valves can hinder the proper intake and exhaust of fuel and air.
- Timing Problems: Incorrect timing can prevent the engine from firing.
Preventing Future Problems
To keep your Craftsman lawnmower running smoothly and prevent future starting issues, follow these tips:
- Regular Maintenance: Perform regular maintenance, including changing the oil, cleaning the air filter, and inspecting the spark plug.
- Proper Storage: Store your lawnmower in a dry, well-ventilated area when not in use.
- Fuel Stabilization: Use fuel stabilizer to prevent gas from going bad while stored.
- Avoid Overloading: Avoid overloading the mower with heavy grass or debris.
By following these tips and troubleshooting steps, you can likely get your Craftsman lawnmower back in working order and enjoy a beautiful, freshly-mowed lawn. Remember, if you are unsure about any step, consulting a professional mechanic is always a wise decision.
FAQ
Why Won’t My Craftsman Lawn Mower Start?
This is a common problem for lawn mower owners. Fortunately, it’s usually a simple fix. Here are some of the most common reasons why your Craftsman lawn mower won’t start:
Q1: Is there gas in the tank?
A1: This might seem obvious, but it’s the first thing you should check. Make sure the gas tank is full or at least has enough gas to run the mower. If the tank is empty, fill it up with fresh gasoline. If the tank is full, check the fuel line for any blockage.
Q2: Is the spark plug connected?
A2: The spark plug is responsible for igniting the fuel-air mixture in the engine. If it’s not connected, the engine won’t start. Check the spark plug wire to make sure it is securely attached to the spark plug. If the wire is loose, tighten it. You may also want to check for any damage to the spark plug wire or spark plug itself. If there is any damage, you should replace them.
Q3: Is the engine getting enough air?
A3: The air filter is designed to prevent dirt and debris from entering the engine. If it’s clogged, it can restrict airflow and prevent the engine from starting. Check the air filter and replace it if it’s dirty.
Q4: Is the blade sharp?
A4: A dull blade can make it difficult for the engine to start. If the blade is dull, sharpen it or replace it with a new one. You can also check the blade to ensure it’s properly attached.
Q5: Is the choke engaged?
A5: The choke helps to enrich the fuel-air mixture when the engine is cold. If the choke isn’t engaged, the engine may not start. Check the choke lever and ensure it’s in the correct position.
Q6: Has the battery died?
A6: If your Craftsman lawn mower is electric, a dead battery will prevent it from starting. Make sure the battery is charged. If you haven’t used the mower in a while, you may need to jump-start the battery.
Q7: Is the fuel old?
A7: Old gasoline can gum up the carburetor and prevent the engine from starting. If the gasoline in the tank is more than a few months old, drain it and refill the tank with fresh gasoline.