If you’re a professional logger or arborist, you know how important it is to have reliable equipment that can handle the toughest jobs. The Stihl MS 661 chainsaw is a popular choice among professionals for its power and durability.
However, like any tool, it can experience issues over time that can affect its performance. In this article, I’ll discuss some of the most common Stihl MS 661 problems and provide solutions to help you keep your saw running smoothly.
Common Stihl MS 661 Problems
Stihl ms 661 is a powerful Chainsaw But Sometimes it develops Some problems like
- Starting Problems
- carburetor issues
- Chain brake malfunctions
- oil Pump Problems
- chain tensioning Issue
- Engine Overheating
- Ignition Coil Failures
Now I will Explain These Problems And Give Some Possible Fixes Below In Detail
Difficulty starting the Stihl MS 661 is a common problem faced by many users. If you experience this issue, it may be due to a clogged air filter or a fouled spark plug.
The carburetor may also be the culprit, especially if it’s not adjusted correctly.
Solution Of Starting Problem
To resolve starting difficulties, start by checking the air filter and spark plug. If they are dirty or worn, replace them.
If the carburetor is the issue, adjust it according to the manufacturer’s instructions or have it serviced by a professional.
The carburetor is an essential part of the Stihl MS 661, and if it’s not functioning correctly, it can cause a range of problems, including starting difficulties and poor performance.
If you notice your saw is running too rich or too lean, it may be time to check the carburetor.
Carburetor Issue Solution
To address carburetor issues, ensure it’s clean and properly adjusted. Check the fuel filter and replace it if necessary.
If the carburetor is damaged or worn out, it may need to be replaced.
Chain Brake Malfunctions
The chain brake is a safety feature designed to stop the chain in the event of a kickback. If the chain brake on your Stihl MS 661 is malfunctioning, it can be dangerous to use the saw.
Common causes of chain brake malfunctions include a worn or damaged brake band, a broken spring, or a faulty brake handle.
Solution For Chain Brake Malfunctions
If the chain brake on your Stihl MS 661 is malfunctioning, discontinue use until it’s repaired.
Inspect the brake band, spring, and handle for damage, and replace them if necessary.
Oil Pump Problems
The oil pump is responsible for lubricating the chain, and if it’s not functioning correctly, it can cause excessive wear and tear on the chain and bar.
If you notice a decrease in the amount of oil being delivered to the chain, it may be due to a clogged oil filter or a malfunctioning oil pump.
Oil Pump Problems
To fix oil pump problems, clean or replace the oil filter and check the oil pump’s operation. If it’s not delivering enough oil, it may need to be replaced.
Chain Tensioning Difficulties
Maintaining proper chain tension is essential for the safe and efficient operation of the Stihl MS 661.
If you’re having difficulty adjusting the chain tension, it may be due to a worn or damaged bar, a loose or damaged chain, or a malfunctioning tensioning mechanism.
Chain Tensioning Solution
To adjust chain tension correctly, inspect the bar and chain for damage, and replace them if necessary. Tighten the chain to the correct tension using the saw’s tensioning mechanism.
Overheating is a common problem with many chainsaws, including the Stihl MS 661.
If you notice the engine is running hot or the saw is stalling frequently, it may be due to a clogged air filter, a malfunctioning carburetor, or a blocked muffler.
Engine Overheating Fixes
To prevent engine overheating, ensure the air filter and muffler are clean and unobstructed. Adjust the carburetor to the correct settings or have it serviced by a professional.
Ignition Coil Failures
The ignition coil is responsible for providing the spark that ignites the fuel in the combustion chamber.
If the ignition coil on your Stihl MS 661 fails, it can cause starting difficulties or poor performance. Common causes of ignition coil failures include moisture buildup, excessive heat, or damage to the coil.
Solution For Coil Failures
To fix ignition coil failures, inspect the coil for damage, and replace it if necessary. Ensure it’s installed correctly, and check for moisture buildup or excessive heat that could cause future failures.
Chainsaw Won’t Stay Running
If your Stihl MS 661 starts but won’t stay running, it could be due to several reasons, including a Clogged fuel filter dirty, carburetor Faulty ignition, or coil Malfunctioning fuel pump.
Here’s what you can do to troubleshoot this problem:
- Check the fuel filter and replace it if necessary.
- Clean the carburetor or have it serviced by a professional.
- Check the ignition coil and replace it if necessary.
- Have the fuel pump checked by a professional.
The Stihl MS 661 is a powerful chainsaw that can handle tough jobs, but like any tool, it can experience problems over time. By identifying common issues and following the solutions, you can keep your Chainsaw running smoothly and safely.
Regular maintenance and inspection are essential to keep your Stihl MS 661 performing at its best.
What causes the Stihl MS 661 to overheat?
How do I adjust the chain tension on my Stihl MS 661?
What should I do if the chain brake on my Stihl MS 661 is malfunctioning?
Can I replace the ignition coil on my Stihl MS 661 myself?
How often should I service my Stihl MS 661?
Why is my Stihl MS 661 hard to start?
John is a Chainsaw and small engine technician! With years of experience in the industry, John has honed his skills and knowledge to provide top-notch Advice for all your small engine and chainsaw needs. From routine maintenance to complex repairs, John has the expertise to get the job done efficiently and effectively. He takes pride in delivering high-quality information, ensuring that your equipment is running smoothly and safely.