5 Most Common Stihl MS 661 Problems & How to Fix Them

The Stihl MS 661 is a powerful chainsaw that can handle a variety of tasks. However, like any other piece of machinery, it can experience problems from time to time. In this blog post, we will discuss the 5 most common Stihl MS 661 problems and how to fix them!

Stihl MS 661 Problems

1. Clutch Problems: The clutch is an important component of the chainsaw as it disengages the power when needed. If the clutch fails to engage or disengage, then this can cause problems with cutting and could be dangerous. To fix this problem, you will need to replace the clutch assembly with a new one.
2. Fuel Leaks: Fuel leaks are a common issue for many types of machinery and Stihl MS 661s are no exception! Check all hoses and connections for loose fittings or cracks that could be causing fuel to leak out. You may also need to replace any faulty gaskets or seals if they cannot be fixed properly.
3. Spark Plug Issues: A fouled or dirty spark plug can cause a variety of issues with the chainsaw. This includes difficulty starting, poor performance, and stalling. To fix this problem, you will need to remove the spark plug and clean it before reinstalling it back in the machine.
4. Poor Chain Tension: In order for your chainsaw to work properly, you need to make sure that the chain is properly tensioned. If it is too loose, then it could slip off during use which can be dangerous! Use a tensioning tool to ensure that the chain is tight enough but not overly tight as this could also cause problems.
5. Kickback: Kickback is when the chain suddenly jumps back towards you while operating the chainsaw. This can be dangerous and should be avoided at all costs. To reduce the risk of kickback, always use the correct cutting technique and keep your chain sharp.

These are just some of the most common Stihl MS 661 problems that you may encounter during ownership. While some may require professional help, others can easily be fixed with a few simple tools and maintenance.

If you ever experience any issues with your Stihl chainsaw, take steps to troubleshoot it before seeking out a repair shop or professional service!

Stihl MS 661 problem -chainsaw idles erratically

The Stihl MS 661 problem of an erratic idle is usually caused by a weak mixture of fuel and air. This can be due to several factors, such as clogged air filters, dirty spark plugs, or incorrect carburetor settings.

To resolve this issue, you will need to inspect the components mentioned above and make necessary adjustments or cleanings if needed.

Additionally, it is also important to ensure that your chainsaw has enough oil in the bar and chain before starting it up again. Once all of these steps have been taken care of, you should be able to get your Stihl MS 661 running smoothly again.

Stihl MS 661 fails to reach the highest speed – solution

If your Stihl MS 661 is not reaching its maximum speed, there are a few potential solutions you can try. First, make sure the fuel mix is correct; if it’s too lean or too rich, the engine won’t get the needed power to run at full speed.

Also, check that all of the air filters and spark plugs are clean and functioning properly. Finally, inspect the carburetor for any clogs or blockages that could be preventing fuel from flowing correctly.

If none of these solutions work, it may be time to replace parts like the carburetor or spark plug in order to restore your chainsaw’s performance.

Your local Stihl dealer should have any necessary parts, as well as knowledgeable service staff who can provide further guidance.

Stihl MS 661 chainsaw problem – crooked cutting

If your Stihl MS 661 chainsaw is producing crooked cuts, there are several possible causes. The most likely cause is an incorrect chain tension. If the bar and chain are not properly tensioned, the saw will produce uneven or jerky cuts.

Other potential causes include a dull chain, damaged guide bar rails or improper sharpening angles. If your Stihl MS 661 chainsaw has been in storage for some time, the drive link rivets may have stretched or worn down causing a lack of proper tension.

In this case you’ll need to replace the entire chain and guide bar combination to restore proper function.

To ensure optimal performance, always use new genuine Stihl replacement parts when servicing your Stihl MS 661 chainsaw.

Follow the manufacturer’s directions for proper chain tension and always wear protective gear when using any type of chainsaw.

Regular maintenance will also help to ensure that your Stihl MS 661 chainsaw is operating at peak performance. Check the air filter, spark plug and fuel lines regularly to keep your saw running smoothly.

If you suspect a problem with your Stihl MS 661 chainsaw, take it in to a certified service center for diagnosis and repair as soon as possible.

A trained technician can identify the source of the issue and make sure that your saw is running correctly and safely. A properly maintained Stihl MS 661 chainsaw should provide years of reliable use.

Stihl MS 661 Chain slipping – solution

The best way to solve the problem of the chain slipping on the Stihl MS 661 chainsaw is to check the chain tension. The correct tension for the chain should be between 1/4 and 5/16 of an inch measured at the guide bar tip.

To adjust it, loosen the adjusting screw and use a flat blade screwdriver to turn the adjusting nut one or two clicks in either direction until you reach the desired tension. Make sure not to over-tighten as this can damage your saw’s engine.

Additionally, you should also look for any damage or wear to your bar and chain that could cause it to slip, such as bent links or dull cutting surfaces. If any of these are present, they need to be replaced before further use.

Lastly, make sure your chain oil is full and at the proper level so that it can lubricate and protect the bar and chain while cutting. Doing all this should help reduce or eliminate any slipping issues you may be experiencing with your Stihl MS 661 chainsaw.

Stihl MS 661 chainsaw problem – Not enough power

When using a Stihl MS 661 chainsaw, one of the most common problems experienced is that the saw does not have enough power.

This can be caused by several different issues, such as incorrect carburetor settings or a clogged air filter. If you are having difficulty with your Stihl MS 661 chainsaw not having enough power, here are some steps to help troubleshoot and resolve the issue:

1. Check your spark plug – A dirty or worn-out spark plug can drastically reduce engine performance and cause your saw to lack sufficient power. Make sure that your spark plug is clean and in good condition before proceeding with any other troubleshooting steps.
2. Inspect the air filter – Clogged air filters can cause your engine to run lean and reduce power. Make sure that your air filter is clean and in good condition before continuing with any other troubleshooting steps.
3. Adjust the carburetor – If your saw has been running too rich or too lean, it will not produce enough power. Check the adjustment screws on the carburetor and adjust them as necessary to ensure that they are set correctly for optimal performance.
4. Perform a compression test – Low compression can drastically reduce power output from an engine, so it’s important to make sure that your chainsaw is producing adequate levels of compression before proceeding with further investigation into potential problems.
5. Clean or replace the fuel lines – Clogged or worn-out fuel lines can also cause poor engine performance. Make sure that your fuel lines are clean and in good condition before attempting to start the chainsaw.

By following these steps, you should be able to troubleshoot and resolve the issue of your Stihl MS 661 not having enough power. If the problem persists after trying all of these steps, it may be necessary to take it in for professional servicing.

Stihl MS 661 chainsaw problem – Poorly aligned teeth

This can cause the chain to cut unevenly, or even skip over some sections of wood. This can be caused by a loose bar nut, worn guide bar sprocket, incorrect chain tension or damaged drive link.

To fix this issue, check that all parts are properly tightened and aligned. You may need to adjust the tension according to your saw’s manual. Additionally, you should replace any damaged parts and use the correct chain for your particular model of Stihl MS 661 chainsaw.

Regular maintenance is key in helping prevent future issues with your Stihl MS 661 chainsaw as well as ensuring safe operation. Be sure to inspect the chain each time before use for signs of wear and tear such as cracked links or stretched drive links.

If the drive links are excessively worn, it’s time to replace the chain. When replacing the chain, be sure to use a Stihl-designated replacement as these chains are designed specifically for your particular model of MS 661 chainsaw.

Properly aligning and maintaining your saw’s components can help reduce wear and tear on its parts as well as improve efficiency and performance when cutting wood.

Taking just a few minutes each time before you use your saw can make a big difference in how safely and effectively you use it! By following these simple steps, you can ensure that you get the best possible results with your Stihl MS 661 chainsaw every time.