Owning a lawn mower is a necessity for most homeowners, especially those with large yards. But a lawn mower is only as good as its maintenance. And with Briggs & Stratton being one of the most popular engine brands, knowing how to properly service it can save you money, keep your mower running smoothly, and ensure a beautiful lawn.
This comprehensive guide will walk you through the essential steps of servicing your Briggs & Stratton lawn mower, from basic maintenance to more involved repairs. We’ll cover everything from changing the oil and spark plug to cleaning the air filter and carburetor. By following these steps, you can keep your lawn mower in top condition and enjoy a hassle-free mowing experience.
Understanding Your Lawn Mower’s Engine
Briggs & Stratton engines are renowned for their durability and ease of maintenance. The basic principles of service apply to many models. Knowing a few key components and their functions will help you better understand the service process:
- Engine Oil: Lubricates moving parts, reducing friction and wear.
- Air Filter: Keeps debris and dust out of the engine.
- Spark Plug: Generates the spark that ignites the fuel-air mixture.
- Carburetor: Mixes fuel and air in the correct proportions.
- Fuel System: Delivers fuel to the carburetor.
- Muffler: Reduces engine noise.
Essential Maintenance Tasks for Your Briggs & Stratton Lawn Mower
Regular maintenance is key to keeping your lawn mower running smoothly. Here are the most important tasks to perform:
1. Changing the Oil
Why: Dirty oil can clog the engine’s internal components, leading to reduced performance and premature wear.
Frequency: Every 25 hours of use or at the beginning of each mowing season.
Tools needed: Oil wrench, drain pan, new oil, funnel.
Steps:
- Locate the oil drain plug: This is usually found on the bottom of the engine crankcase.
- Place the drain pan under the plug: To catch the old oil.
- Remove the drain plug: Use the oil wrench to carefully loosen and remove the plug.
- Allow the oil to drain completely: This may take a few minutes.
- Replace the drain plug: Tighten the plug securely but do not overtighten.
- Add new oil: Use the funnel to carefully pour the correct amount of oil into the engine’s fill hole. Refer to your owner’s manual for the recommended oil type and quantity.
- Check the oil level: Use the dipstick to make sure the oil level is within the recommended range.
2. Replacing the Air Filter
Why: A dirty air filter restricts airflow to the engine, causing it to run inefficiently.
Frequency: Every 25 hours of use or at the beginning of each mowing season.
Tools needed: Screwdriver (usually Phillips head), new air filter.
Steps:
- Locate the air filter: It’s usually found under a plastic cover on the engine.
- Remove the cover: Use the screwdriver to remove the screws holding the cover in place.
- Remove the old air filter: The old air filter may be held in place with a clip or a screw.
- Install the new air filter: Ensure it’s properly seated in the housing.
- Replace the air filter cover: Secure the cover with the screws.
3. Cleaning the Carburetor
Why: A dirty carburetor can cause engine problems like poor starting, stalling, and fuel inefficiency.
Frequency: Every 100 hours of use or if you experience starting problems.
Tools needed: Carburetor cleaner, small screwdriver, wire brush, rag.
Steps:
- Disconnect the fuel line: This will prevent fuel from leaking.
- Remove the carburetor: This involves removing the screws attaching the carburetor to the engine.
- Clean the carburetor: Use carburetor cleaner to spray and clean the jets, passages, and internal components. You may need to use a small screwdriver and wire brush to remove any stubborn debris.
- Reassemble the carburetor: Make sure all parts are properly aligned and secured.
- Reconnect the fuel line: Make sure the connection is tight.
- Start the engine: The engine should start easily with no fuel leaks.
4. Replacing the Spark Plug
Why: A worn spark plug can cause starting problems, misfires, and reduced engine power.
Frequency: Every 50 hours of use or at the beginning of each mowing season.
Tools needed: Socket wrench, new spark plug, gap gauge.
Steps:
- Locate the spark plug: It’s usually found on top of the engine cylinder.
- Disconnect the spark plug wire: Remove the wire from the spark plug.
- Remove the spark plug: Use the socket wrench to carefully remove the old spark plug.
- Check the spark plug gap: Use the gap gauge to ensure it matches the manufacturer’s specifications. If not, adjust the gap using a spark plug gap tool.
- Install the new spark plug: Screw the new spark plug into the cylinder head. Hand-tighten it first, then tighten it further using the socket wrench.
- Reconnect the spark plug wire: Ensure it is securely connected.
Further Maintenance Considerations
While the above tasks are essential, some other maintenance steps can help you keep your Briggs & Stratton mower in excellent shape:
- Clean the mower deck: Remove accumulated grass and debris to prevent rust and improve cutting performance.
- Sharpen the blades: Dull blades can cause uneven cutting and damage to the lawn.
- Check the fuel system: Make sure the fuel tank is clean and the fuel lines are free of blockages.
- Lubricate moving parts: Apply grease to the mower’s bearings, wheels, and other moving parts to prevent wear and tear.
- Check and adjust the drive belt: Ensure the belt is properly tensioned and not worn or frayed.
Troubleshooting Common Briggs & Stratton Lawn Mower Problems
Even with proper maintenance, your lawn mower may experience some issues. Here are some common problems and their potential solutions:
- Engine won’t start:
- Check the fuel level.
- Make sure the choke is engaged.
- Inspect the spark plug for wear or fouling.
- Clean or replace the air filter.
- Check the fuel lines for blockages.
- Engine runs poorly:
- Clean the air filter.
- Clean or rebuild the carburetor.
- Adjust the engine speed.
- Mower won’t cut evenly:
- Sharpen the blades.
- Check the deck for proper alignment.
- Adjust the cutting height.
Conclusion: Keep Your Briggs & Stratton Mower Running Strong
Maintaining a Briggs & Stratton lawn mower is not as daunting as it may seem. By performing regular maintenance, you can keep your mower running smoothly and efficiently for years to come. This comprehensive guide provides the essential steps and information you need to take care of your mower. Always consult your owner’s manual for specific details on your model, and don’t hesitate to contact a professional if you encounter any complex issues. With a little effort and care, you can enjoy a beautiful lawn for many seasons to come.
FAQs
1. What type of oil should I use for my Briggs & Stratton lawn mower?
For your Briggs & Stratton lawn mower, you should use SAE 30 oil if you live in a climate where temperatures often exceed 32 degrees Fahrenheit. If you live in a colder climate, you may want to use a lighter oil, such as SAE 5W-30. It’s crucial to refer to your owner’s manual for specific oil recommendations based on your mower model and operating conditions. Using the wrong type of oil can lead to engine damage.
2. How often should I change the oil in my Briggs & Stratton lawn mower?
The frequency of oil changes depends on your usage and the recommendations outlined in your owner’s manual. However, a general rule of thumb is to change the oil every 25 hours of operation or at least once a year. If you use your mower frequently, it’s best to change the oil more often. This helps to prevent engine wear and tear and ensures optimal performance.
3. How do I check the air filter on my Briggs & Stratton lawn mower?
To check the air filter, locate it under the engine cover or near the carburetor. Typically, it’s a foam or paper element encased in a plastic housing. Remove the housing and inspect the filter. If it’s dirty or clogged, replace it with a new one. A clean air filter ensures proper airflow to the engine, promoting optimal combustion and performance.
4. How do I clean the spark plug on my Briggs & Stratton lawn mower?
Locate the spark plug on the engine, usually near the top of the cylinder head. Disconnect the spark plug wire and carefully remove the spark plug using a spark plug socket. Clean the spark plug’s electrode and gap with a wire brush or a small piece of sandpaper. Make sure to adjust the gap to the manufacturer’s specification. A clean spark plug ensures proper ignition and optimal engine performance.
5. How do I sharpen the blades on my Briggs & Stratton lawn mower?
To sharpen the blades, remove them from the mower using a wrench. Secure the blade in a vice and use a sharpening steel or a grinding wheel to sharpen the edges. It’s crucial to maintain a consistent angle throughout the sharpening process. Once sharpened, reattach the blades to the mower and tighten them securely. Sharpened blades provide a clean cut and prevent damage to the lawn.
6. How do I clean the carburetor on my Briggs & Stratton lawn mower?
If your mower is experiencing starting difficulties or running poorly, you might need to clean the carburetor. Remove the carburetor from the engine and use a carburetor cleaner to remove any debris or deposits. Be sure to wear safety goggles and gloves during this process. Once cleaned, reassemble the carburetor and reinstall it on the engine. A clean carburetor ensures proper fuel flow and optimal engine performance.
7. What should I do if my Briggs & Stratton lawn mower won’t start?
If your Briggs & Stratton lawn mower won’t start, first check for basic issues such as a lack of fuel, a dead battery, or a clogged air filter. If these are not the problem, you may need to inspect the spark plug, the ignition system, or the carburetor. If you’re unable to diagnose the issue yourself, it’s best to seek assistance from a qualified mechanic.