Stihl 220 Chainsaw Troubleshooting Tips (5 Pro Fixes)

Stihl MS 220 Chainsaw Troubleshooting: 5 Pro Fixes to Get You Cutting Again

There’s nothing more frustrating than a chainsaw that refuses to cooperate, especially when you’re in the thick of a firewood project or clearing storm damage. I’ve been there countless times, wrestling with a stubborn saw that just won’t start or cuts poorly. The Stihl MS 220, while a reliable workhorse, isn’t immune to its share of problems. Over the years, I’ve learned a few tricks to diagnose and fix common issues with this model. Let me share my experience and help you get your Stihl MS 220 chainsaw back in action with these five pro fixes.

Understanding the Stihl MS 220: A Brief Overview

The Stihl MS 220 is a popular choice for homeowners and light-duty professionals due to its combination of power and maneuverability. It typically features a 40.2 cc engine, a 16-inch or 18-inch bar, and weighs around 10 pounds (without fuel and bar). It’s a solid saw for felling small trees, limbing, and cutting firewood. However, like any piece of machinery, it requires proper maintenance and occasional troubleshooting.

Fix #1: The Chainsaw Won’t Start: Fuel and Ignition Issues

A chainsaw that refuses to start is a classic problem. Before tearing anything apart, let’s start with the basics.

Checking the Fuel System

• Fuel Mix: The Stihl MS 220 requires a 50:1 fuel-to-oil ratio. This means 50 parts gasoline to 1 part 2-cycle engine oil. Always use a high-quality 2-cycle oil designed for air-cooled engines. Using the wrong fuel mixture is a common mistake. Too much oil can cause the saw to smoke excessively and lose power, while too little oil can lead to engine damage. I use a pre-mixed fuel from Stihl to avoid any ratio issues.
• Old Fuel: Gasoline degrades over time, especially when mixed with oil. If your saw has been sitting for a while, the fuel might be stale. Drain the old fuel and replace it with fresh fuel. I recommend Stabil fuel stabilizer if you plan to store your saw for more than a month.
• Fuel Filter: A clogged fuel filter restricts fuel flow to the carburetor. Locate the fuel filter inside the fuel tank (it’s usually attached to the fuel line). Remove it and inspect it. If it’s dirty or clogged, replace it. I typically replace my fuel filter annually, or more often if I’m cutting in dusty conditions.
• Fuel Line: Inspect the fuel line for cracks, leaks, or kinks. A damaged fuel line can prevent fuel from reaching the carburetor. Replace the fuel line if necessary.
• Carburetor: If the fuel system seems fine, the carburetor might be the culprit. A dirty carburetor can cause starting problems, poor idling, and stalling. Cleaning the carburetor involves disassembling it and cleaning the jets and passages with carburetor cleaner. If you’re not comfortable doing this yourself, take it to a qualified mechanic. I’ve had success cleaning carburetors with ultrasonic cleaners.

Inspecting the Ignition System

• Spark Plug: A faulty spark plug can prevent the engine from firing. Remove the spark plug and inspect it. Look for cracks, carbon buildup, or a fouled electrode. Clean the spark plug with a wire brush or replace it if necessary. The spark plug gap should be around 0.020 inches. Use a spark plug gap tool to ensure the correct gap. I always carry a spare spark plug in my chainsaw kit.
• Spark Test: To test the spark, connect the spark plug to the ignition lead and ground the spark plug against the engine. Pull the starter cord and look for a strong, consistent spark. If there’s no spark, the ignition coil might be faulty.
• Ignition Coil: The ignition coil generates the high-voltage spark that ignites the fuel mixture. If the ignition coil is faulty, it needs to be replaced. This is a more involved repair, so consider taking it to a professional if you’re not comfortable working on small engines.

Takeaway

Starting problems are often related to fuel or ignition. Check the fuel mix, fuel filter, spark plug, and spark. A systematic approach will help you pinpoint the issue.

Fix #2: The Chainsaw Starts But Stalls: Carburetor Adjustments and Air Filter Issues

If your chainsaw starts but stalls soon after, the issue is likely related to the carburetor settings or a restricted airflow.

Carburetor Adjustment

The carburetor controls the air-fuel mixture entering the engine. Incorrect carburetor settings can cause stalling, poor performance, and excessive smoke. The Stihl MS 220 carburetor typically has three adjustment screws:

• L (Low-Speed): Adjusts the fuel mixture at idle and low speeds.
• H (High-Speed): Adjusts the fuel mixture at high speeds.
• LA (Idle Speed): Adjusts the engine idle speed.

Procedure:

1. Warm up the engine: Let the engine run for a few minutes to warm up.
2. Adjust the L screw: Turn the L screw clockwise until the engine starts to stumble or die. Then, turn it counterclockwise until the engine runs smoothly at idle.
3. Adjust the LA screw: Turn the LA screw until the chain stops moving at idle. The engine should idle smoothly without stalling.
4. Adjust the H screw: This is best left to a professional, as incorrect adjustment can damage the engine. However, if you need to adjust it, turn it counterclockwise to richen the mixture (more fuel) or clockwise to lean the mixture (less fuel). Listen for a smooth, consistent engine sound at full throttle.

I recommend making small adjustments (1/8 turn) and listening to the engine’s response. A tachometer can be helpful for setting the idle speed accurately.

Air Filter Inspection

A dirty air filter restricts airflow to the engine, causing it to stall or run poorly. Remove the air filter and inspect it. If it’s dirty, clean it with warm soapy water. Allow it to dry completely before reinstalling it. I clean my air filter after every 5-10 hours of use, depending on the conditions. Replace the air filter if it’s damaged or excessively dirty.

Takeaway

Carburetor adjustments and air filter maintenance are crucial for smooth chainsaw operation. Learn to adjust the carburetor and clean the air filter regularly.

Fix #3: The Chainsaw Cuts Poorly: Chain Sharpening and Bar Maintenance

A dull chain is a common cause of poor cutting performance. A sharp chain cuts smoothly and efficiently, while a dull chain requires more effort and can be dangerous.

Chain Sharpening

• Tools: You’ll need a chainsaw file, a file guide, and a depth gauge tool. The correct file size depends on the chain pitch. For the Stihl MS 220, a 5/32-inch file is usually appropriate.
• Procedure: Place the file guide on the chain, aligning the file with the cutting tooth. File each tooth at the correct angle (usually marked on the file guide). Maintain a consistent angle and depth for each tooth. Check the depth gauges with the depth gauge tool and file them down if necessary.
• Technique: I use a consistent, smooth motion when filing. Avoid applying too much pressure, as this can damage the chain. After sharpening, the chain should cut aggressively without pulling or vibrating excessively.

I sharpen my chain every time I refuel the saw, or more often if I’m cutting dirty or abrasive wood. A sharp chain is not only more efficient but also safer.

Bar Maintenance

• Bar Rail Wear: The bar rails can wear down over time, causing the chain to fit loosely. Use a bar rail dressing tool to restore the bar rails to their original shape.
• Bar Groove Cleaning: The bar groove can become clogged with sawdust and debris, preventing the chain from lubricating properly. Clean the bar groove with a screwdriver or a specialized bar groove cleaner.
• Bar Oiling: Ensure that the bar oiler is working correctly. Check the oil level in the oil tank and make sure the oiler is delivering oil to the chain. A lack of lubrication can cause the chain to overheat and wear prematurely.

I flip my chainsaw bar regularly to distribute wear evenly. I also inspect the bar for damage, such as cracks or bends, and replace it if necessary.

Takeaway

A sharp chain and a well-maintained bar are essential for efficient and safe chainsaw operation. Learn to sharpen your chain and maintain your bar regularly.

Fix #4: The Chainsaw Overheats: Cooling System Inspection

Overheating can damage the engine and reduce the lifespan of your chainsaw. The Stihl MS 220 relies on air cooling to dissipate heat.

Cooling Fins

The engine is equipped with cooling fins that help to dissipate heat. Make sure the cooling fins are clean and free of debris. Use a brush or compressed air to remove any dirt or sawdust.

Airflow

Ensure that there is adequate airflow around the engine. Avoid operating the chainsaw in confined spaces or in hot weather without sufficient ventilation.

Spark Arrestor Screen

The spark arrestor screen prevents sparks from exiting the exhaust. A clogged spark arrestor screen can restrict exhaust flow and cause the engine to overheat. Remove the spark arrestor screen and clean it with a wire brush. Replace the spark arrestor screen if it’s damaged.

I clean the cooling fins and spark arrestor screen regularly, especially during hot weather. Overheating can lead to serious engine damage, so it’s important to maintain the cooling system.

Takeaway

Overheating can damage your chainsaw’s engine. Keep the cooling fins clean, ensure adequate airflow, and clean the spark arrestor screen regularly.

Fix #5: The Chainsaw Chain Brakes: Brake Band and Mechanism Inspection

The chain brake is a critical safety feature that stops the chain in the event of kickback. A malfunctioning chain brake can be dangerous.

Brake Band Inspection

The brake band is the component that stops the chain. Inspect the brake band for wear or damage. If the brake band is worn or cracked, it needs to be replaced.

Brake Mechanism Inspection

The brake mechanism consists of the handle, linkage, and spring. Make sure all components are moving freely and are properly lubricated. If the brake mechanism is stiff or binding, it needs to be cleaned and lubricated.

Brake Test

Test the chain brake regularly to ensure it’s functioning correctly. Engage the chain brake and try to pull the starter cord. The chain should not move. If the chain moves, the brake is not working properly and needs to be repaired.

I test my chain brake before each use. A properly functioning chain brake can prevent serious injuries.

Takeaway

The chain brake is a critical safety feature. Inspect the brake band and mechanism regularly, and test the brake before each use.

Advanced Troubleshooting: When to Seek Professional Help

While I’ve covered some common troubleshooting tips, there are times when it’s best to seek professional help. If you’re not comfortable working on small engines, or if you’ve tried the above fixes and your chainsaw is still not working properly, take it to a qualified mechanic.

Here are some situations where professional help is recommended:

• Engine damage: If you suspect the engine is damaged (e.g., knocking sounds, excessive smoke), take it to a mechanic.
• Carburetor issues: If you’re unable to adjust the carburetor properly, or if the carburetor is severely clogged, seek professional help.
• Ignition system problems: If you’ve replaced the spark plug and the saw still has no spark, the ignition coil or other ignition components might be faulty.
• Major repairs: If the chainsaw requires major repairs, such as engine rebuilds or transmission repairs, it’s best left to a professional.

Preventative Maintenance: Keeping Your Stihl MS 220 Running Smoothly

Preventative maintenance is key to extending the life of your chainsaw and preventing problems. Here are some tips:

• Regular cleaning: Clean the chainsaw after each use, removing sawdust and debris from the engine, bar, and chain.
• Chain lubrication: Ensure that the chain is properly lubricated at all times.
• Air filter maintenance: Clean or replace the air filter regularly.
• Spark plug maintenance: Clean or replace the spark plug annually.
• Fuel system maintenance: Use fresh fuel and a fuel stabilizer. Replace the fuel filter annually.
• Bar maintenance: Clean the bar groove and dress the bar rails regularly.
• Chain sharpening: Sharpen the chain regularly.
• Storage: Store the chainsaw in a dry, clean place. Drain the fuel tank before storing the chainsaw for extended periods.

By following these preventative maintenance tips, you can keep your Stihl MS 220 running smoothly for years to come. I have a checklist I follow every time I use the chainsaw to ensure I don’t miss any important maintenance steps.

Safety First: Always Prioritize Safety When Working with Chainsaws

Chainsaws are powerful tools that can be dangerous if not used properly. Always prioritize safety when working with chainsaws.

• Wear appropriate safety gear: Wear safety glasses, hearing protection, gloves, chaps, and a helmet.
• Read the owner’s manual: Familiarize yourself with the chainsaw’s operating instructions and safety precautions.
• Maintain a safe working area: Clear the area of obstacles and ensure that you have a stable footing.
• Use the chainsaw properly: Avoid overreaching or cutting above shoulder height.
• Be aware of kickback: Kickback is a sudden, uncontrolled movement of the chainsaw that can cause serious injuries. Be aware of the risk of kickback and take steps to prevent it.
• Never operate a chainsaw when you’re tired or under the influence of drugs or alcohol.
• Inspect the chainsaw before each use: Check for loose parts, damaged components, and proper lubrication.
• Shut off the chainsaw before making adjustments or repairs.
• Carry a first-aid kit: In case of an accident, have a first-aid kit readily available.

I always take a moment to review safety procedures before starting any chainsaw work. It’s a small investment of time that can prevent serious injuries.

Conclusion: Mastering Stihl MS 220 Chainsaw Troubleshooting

Troubleshooting a Stihl MS 220 chainsaw can seem daunting, but by following these pro fixes and practicing preventative maintenance, you can keep your saw running smoothly and efficiently. Remember to prioritize safety and seek professional help when needed. With a little knowledge and effort, you can conquer common chainsaw problems and enjoy the satisfaction of a job well done. I hope my experiences and insights have been helpful. Happy cutting!

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