The gentle hum of a classic Craftsman lawn mower, cutting through the summer grass, is a sound that evokes nostalgia and a sense of accomplishment. But what happens when that familiar sound turns into a stubborn silence? Starting an old Craftsman mower can be a challenge, but with the right knowledge and a little patience, you can bring it back to life. This guide will walk you through the steps of starting an old Craftsman lawn mower, from troubleshooting common problems to performing essential maintenance.
Starting an Old Craftsman Lawn Mower: A Quick Overview
Starting an old Craftsman lawn mower usually requires a few basic steps:
- Prepare the mower: Check the fuel, oil levels, and spark plug.
- Prime the engine: If the mower has been sitting for a while, prime the carburetor.
- Start the engine: Use the starter rope or electric start (if equipped) to get the engine running.
- Adjust the throttle: Set the throttle to the desired speed.
Step 1: Preparing the Mower
Before you attempt to start your Craftsman mower, you need to ensure it’s ready to go. This involves checking the fuel, oil levels, and spark plug.
1.1 Checking the Fuel
- Fuel Level: Inspect the fuel tank. If it’s empty, you’ll need to add fresh gasoline.
- Fuel Quality: Old gasoline can gum up the carburetor and cause starting issues. Use fresh, non-ethanol gasoline.
- Fuel Lines: Ensure the fuel lines are connected and free of cracks or leaks.
1.2 Checking the Oil
- Oil Level: Check the oil level using the dipstick. Add oil if needed, making sure to use the correct type and amount specified in your owner’s manual.
- Oil Condition: If the oil is dark or has a milky appearance, change it immediately.
1.3 Inspecting the Spark Plug
- Spark Plug Condition: The spark plug is crucial for igniting the fuel-air mixture. Remove the spark plug and inspect it for signs of wear, carbon buildup, or damage.
- Spark Plug Gap: Check the spark plug gap using a spark plug gap tool. The gap should be within the manufacturer’s specifications.
- Spark Plug Test: To test the spark plug, connect a spark plug tester to it, ground the tester, and crank the engine. A strong blue spark indicates a working spark plug.
Step 2: Priming the Engine
If your Craftsman mower has been sitting idle for a while, the carburetor might need to be primed. This means introducing a small amount of fuel directly into the carburetor to help the engine start.
2.1 Locate the Primer Bulb
Most Craftsman mowers have a primer bulb located on the carburetor. It’s usually a small, round rubber bulb.
2.2 Prime the Carburetor
- Press the Primer Bulb: Gently press the primer bulb 5-6 times to introduce fuel into the carburetor.
- Avoid Over-Priming: Priming too much can flood the engine, making it difficult to start.
Step 3: Starting the Engine
Now that your Craftsman mower is prepped, you can attempt to start the engine.
3.1 Starting with the Starter Rope
- Choke Position: If your mower has a choke, engage it. This enriches the fuel mixture for easier starting.
- Pull the Starter Rope: Pull the starter rope slowly at first, then give it a firm, consistent pull.
- Avoid Flooding the Engine: If you pull the rope too fast, you could flood the engine.
3.2 Electric Start (If Equipped)
- Battery Check: If your Craftsman mower has an electric start, make sure the battery is charged.
- Turn the Key: Insert the key and turn it to the start position.
Step 4: Adjusting the Throttle
Once the engine is running, you can adjust the throttle to control the engine speed.
4.1 Throttle Position
- Low Speed: Set the throttle to the low position for slower mowing speeds.
- High Speed: Set the throttle to the high position for faster mowing speeds.
Common Starting Problems and Solutions
Even after preparing your Craftsman mower, you may encounter some common starting problems. Here’s how to troubleshoot them:
4.1 Mower Won’t Start at All
- Fuel Issue: Check the fuel tank, fuel lines, and fuel filter.
- Dead Battery (Electric Start): Charge or replace the battery.
- Clogged Carburetor: Clean the carburetor or replace it.
- Spark Plug Issue: Check the spark plug for wear, carbon buildup, or damage. Replace it if necessary.
4.2 Mower Starts but Dies Immediately
- Flooded Engine: Allow the engine to sit for a few minutes to let the excess fuel evaporate. Then try starting it again.
- Choke Issue: Make sure the choke is engaged when starting, then disengage it once the engine starts.
4.3 Mower Runs Rough or Sputters
- Bad Fuel: Drain the old fuel and replace it with fresh gasoline.
- Carburetor Problem: Clean the carburetor or replace it.
Essential Maintenance for Your Craftsman Mower
Regular maintenance is key to keeping your Craftsman mower running smoothly. Here are some essential tasks to perform:
5.1 Oil Changes
Change the oil regularly according to your owner’s manual. This helps prevent engine wear and tear.
5.2 Air Filter Cleaning
Clean the air filter every few mowings to prevent dirt and debris from entering the engine.
5.3 Spark Plug Replacement
Replace the spark plug at least once a year or when it shows signs of wear.
5.4 Carburetor Cleaning
Clean the carburetor every year or if you experience starting problems.
Conclusion
Starting an old Craftsman lawn mower may seem daunting, but by following the steps outlined in this guide, you can successfully bring your vintage mower back to life. Remember to check the fuel, oil levels, and spark plug, and prime the engine if necessary. If you encounter any problems, troubleshoot them systematically. Regular maintenance will ensure your Craftsman lawn mower continues to provide years of reliable service. With a little TLC, you’ll be enjoying the satisfying sound of your Craftsman mower cutting through the grass in no time!
FAQs
1. What are the essential tools and supplies needed to start an old Craftsman lawn mower?
You’ll need a few basic tools and supplies to get your old Craftsman lawn mower running. First, gather some essential tools like a screwdriver set, pliers, a wrench set, and a spark plug wrench. You’ll also need some fuel, oil, a gas can, and a funnel. Additionally, it’s helpful to have a manual for your specific model of Craftsman lawn mower, as it will provide detailed instructions and troubleshooting tips.
These tools and supplies will equip you to tackle most common issues that arise when starting an old lawn mower. If you encounter more complex problems, consulting a repair manual or seeking professional assistance is recommended.
2. How do I check and clean the air filter?
To ensure proper air flow, it’s crucial to check and clean the air filter. Locate the air filter housing, often attached to the carburetor. Remove the cover and inspect the filter element for dirt and debris. If it’s dirty, you can tap it gently to remove loose dirt or wash it with soapy water, allowing it to dry completely before reinstalling.
Regular cleaning of the air filter is essential for optimal engine performance. A dirty filter restricts airflow, leading to poor fuel combustion and difficulty starting. By keeping the air filter clean, you ensure efficient engine operation and longer lifespan.
3. How do I check and change the spark plug?
A spark plug ignites the air-fuel mixture in the engine, so it’s important to check its condition. Locate the spark plug, usually on the top of the engine cylinder, and remove it using a spark plug wrench. Inspect the electrode for wear and tear, and check the gap between the electrode and the ground electrode using a feeler gauge.
If the spark plug is worn, replace it with a new one. Additionally, ensure the spark plug is gapped correctly according to your mower’s manual. Proper spark plug condition and gap ensure efficient combustion and a smooth-running engine.
4. How do I fill the fuel tank and check the oil level?
To fill the fuel tank, locate the fuel cap, often marked with a gas pump symbol. Carefully pour fresh gasoline into the tank, avoiding overfilling. Always use a gas can with a spout to prevent spills. Once the tank is full, secure the cap tightly.
To check the oil level, find the oil dipstick, usually located on the side of the engine. Remove it, wipe it clean, and reinsert it fully. Then, pull it out again to check the oil level against the dipstick markings. If the level is low, add the appropriate type and amount of oil as specified in your mower’s manual.
5. What steps should I take to prime the carburetor?
Priming the carburetor is essential for providing fuel to the engine, especially if the mower hasn’t been used for a while. Locate the primer bulb, usually attached to the carburetor. Press the bulb repeatedly until it becomes firm. This action forces fuel into the carburetor, making it easier to start the engine.
Priming is particularly important when starting a cold engine, as it helps to overcome any air bubbles in the fuel lines. After priming, attempt to start the engine, and if it doesn’t fire up, you may need to repeat the priming process.
6. How do I properly start the engine?
Starting an old Craftsman lawn mower may require some patience and persistence. First, ensure the choke is engaged, usually a lever on the engine. Then, hold the mower firmly and pull the starter cord firmly and consistently. If the engine doesn’t start, try repeating the priming process and ensure the choke is properly engaged.
Once the engine starts, gradually disengage the choke by moving the lever to the “run” position. If the engine sputters or stalls, re-engage the choke temporarily before gradually disengaging it again.
7. What are some common problems and troubleshooting tips?
If your Craftsman lawn mower won’t start, there are several common issues to check. Firstly, ensure the fuel tank is full and fresh gasoline is being used. Secondly, inspect the spark plug for wear and tear and check the gap. Additionally, ensure the air filter is clean and not restricting airflow.
If you suspect a fuel problem, try cleaning the carburetor or replacing the fuel filter. If the engine still doesn’t start, you may need to seek professional assistance from a qualified mechanic.