How To Start My Craftsman Lawn Mower

Starting a Craftsman lawn mower requires a systematic approach to ensure both safety and proper engine operation. This guide provides detailed instructions for starting various types of Craftsman lawn mowers, focusing on common models and potential troubleshooting.

Pre-Start Checks

Fuel and Oil Levels

Before attempting to start your Craftsman lawn mower, verify the fuel and oil levels. Consult your owner's manual for the specific fuel and oil type recommended for your mower model.

To check the fuel level, visually inspect the fuel tank. If the fuel is low or appears contaminated, add fresh fuel. Use a fuel stabilizer, particularly if the mower has been stored for an extended period.

To check the oil level, remove the dipstick, wipe it clean, reinsert it fully, and then remove it again. The oil level should be between the minimum and maximum marks on the dipstick. Add oil as needed, using the correct type specified in your owner's manual. Insufficient oil can cause significant engine damage.

Blade Engagement Lever

Ensure the blade engagement lever (also known as the bail) is disengaged. This lever controls the blades, and attempting to start the mower with the blades engaged is dangerous and can prevent the engine from starting.

Spark Plug Wire

Verify that the spark plug wire is securely connected to the spark plug. A loose or disconnected wire will prevent the engine from starting. Visually inspect the wire and the spark plug for any signs of damage.

Starting a Push Mower

Primer Bulb (If Equipped)

Many Craftsman push mowers are equipped with a primer bulb. If your mower has one, press the primer bulb three to five times. This action introduces a small amount of fuel into the carburetor, aiding in starting. Avoid over-priming, as this can flood the engine.

Starting the Engine

Grip the starter rope handle firmly. Place one foot on the mower deck to stabilize it. Pull the starter rope with a smooth, firm motion. Avoid yanking the rope forcefully, as this can damage the starter mechanism.

If the engine does not start after a few pulls, repeat the priming process (if applicable) and try again. If the engine still fails to start, refer to the troubleshooting section below.

Warm-Up

Once the engine starts, allow it to run for a few moments to warm up. During this time, the engine may run unevenly. This is normal and should stabilize as the engine reaches operating temperature.

Starting a Self-Propelled Mower

Engage Drive Control

For self-propelled mowers, engage the drive control lever or handle after the engine has started. This lever controls the wheels and allows the mower to move forward automatically.

Speed Adjustment

Adjust the speed control to your desired pace. Most self-propelled mowers have multiple speed settings. Start with a slower speed and increase as needed.

Starting a Riding Mower

Seat Safety Switch

Riding mowers are equipped with a seat safety switch. This switch prevents the engine from starting unless the operator is seated. Ensure you are properly seated before attempting to start the mower.

Parking Brake

Engage the parking brake before starting the engine. This prevents the mower from moving unexpectedly during startup.

Blade Engagement Switch

Ensure the blade engagement switch is in the "off" or disengaged position. Similar to push mowers, starting the mower with the blades engaged is dangerous.

Throttle Control

Set the throttle control to the "start" or "choke" position. This provides the engine with a richer fuel mixture for starting. Refer to your owner’s manual for the specific location of the throttle control.

Ignition Key

Insert the ignition key and turn it to the "start" position. Hold the key in this position until the engine starts. Release the key as soon as the engine starts; it will typically return to the "run" position automatically.

Warm-Up

Allow the engine to warm up for a few minutes before engaging the blades or driving the mower. This ensures smoother operation and prolongs engine life.

Troubleshooting Starting Problems

No Fuel

If the engine fails to start, check the fuel tank to ensure it contains sufficient fuel. If the fuel is old or contaminated, drain the tank and add fresh fuel. Consider using a fuel stabilizer.

Clogged Carburetor

A clogged carburetor is a common cause of starting problems. If you suspect a clogged carburetor, you may need to clean or replace it. This often involves disassembling the carburetor and cleaning the jets and passages with carburetor cleaner. Consulting a qualified mechanic is recommended if you are not comfortable performing this task.

Dirty Air Filter

A dirty air filter can restrict airflow to the engine, making it difficult to start. Inspect the air filter and clean or replace it as needed. Refer to your owner's manual for the correct procedure.

Faulty Spark Plug

A faulty spark plug can prevent the engine from starting. Remove the spark plug and inspect it for signs of damage or fouling. Clean the spark plug with a wire brush or replace it with a new one. Ensure the spark plug gap is set correctly according to your owner's manual.

Weak Battery (Riding Mowers)

For riding mowers, a weak battery can prevent the engine from starting. Check the battery voltage with a multimeter. If the voltage is low, charge the battery or replace it if necessary. Also, check the battery connections for corrosion and clean them with a wire brush.

Safety Switch Issues

Faulty safety switches can prevent the engine from starting. Check the seat safety switch (riding mowers), blade engagement switch, and parking brake switch for proper operation. These switches are designed to prevent the engine from starting unless certain conditions are met. Inspect the wiring and connections to these switches for any signs of damage or corrosion.

Flooded Engine

If the engine has been over-primed or cranked excessively, it may become flooded. To clear a flooded engine, remove the spark plug and pull the starter rope several times to expel excess fuel from the cylinder. Reinstall the spark plug and try starting the engine again without priming.

Safety Precautions

Read the Owner's Manual

Always read and understand the owner's manual before operating your Craftsman lawn mower. The manual contains important safety information and operating instructions specific to your mower model.

Wear Protective Gear

Wear appropriate protective gear, including eye protection, hearing protection, and sturdy footwear, when operating the mower.

Clear the Area

Before starting the mower, clear the area of any obstacles, such as rocks, branches, or toys. These objects can be thrown by the mower blades and cause injury or damage.

Avoid Loose Clothing

Avoid wearing loose clothing or jewelry that could become entangled in the mower's moving parts.

Mow in Daylight

Mow only in daylight or good artificial light. Never mow in the dark or when visibility is poor.

Never Remove Safety Devices

Never remove or disable any safety devices on the mower, such as guards or shields. These devices are designed to protect you from injury.

Key Takeaways

Starting a Craftsman lawn mower involves several crucial steps, including checking fuel and oil levels, disengaging the blade engagement lever, and following the specific starting procedure for your mower type. Troubleshooting starting problems often involves checking the fuel supply, air filter, spark plug, and safety switches.

Prioritizing safety by reading the owner's manual, wearing protective gear, and clearing the mowing area is essential for preventing accidents and injuries. Regular maintenance, such as cleaning or replacing the air filter and spark plug, can improve the mower's performance and prolong its lifespan. Consulting a qualified mechanic is recommended for complex repairs or if you are uncomfortable performing the work yourself.