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Gregory HernandezSep 4, 2025
Why does my Stihl MS 661 C-M idle erratically?
- JJesse MolinaSep 4, 2025
If your Stihl Chainsaw's engine idles erratically, the carburetor might be iced up. Allow the engine to gradually warm up to about 50 °F (10 °C).
Why does my Stihl MS 661 C-M idle erratically?
If your Stihl Chainsaw's engine idles erratically, the carburetor might be iced up. Allow the engine to gradually warm up to about 50 °F (10 °C).
Why does my Stihl MS 661 C-M Chainsaw smoke or smell burnt when sawing?
If your Stihl Chainsaw smokes or smells burnt during sawing, the chain might be dull or improperly sharpened. Sharpen the chain properly.
What to do if Stihl MS 661 C-M engine stops while idling?
If your Stihl Chainsaw engine stops while idling, it may be because the carburetor is iced up. Allow the saw to warm up to +10°C.
What to do if the Stihl MS 661 C-M Chainsaw chain does not rotate when the throttle is opened?
If the Stihl Chainsaw chain doesn't rotate when you open the throttle: * Check if the chain brake is engaged and disengage it. * See if the chain is over-tensioned and tension it properly. * Inspect the bar nose sprocket for blockage and clean it with STIHL resin solvent.
Why does my Stihl MS 661 C-M Chainsaw smoke or have a burning smell while cutting?
If you notice smoke or a burning smell while cutting with your Stihl Chainsaw, it could be due to several reasons: * The chain might not be properly sharpened, so sharpen it. * There might be insufficient chain oil in the tank, so fill it up. * The chain lubrication system might be supplying insufficient chain oil, so increase the oil feed rate. * The chain could be over-tensioned, so tension it properly. * The chainsaw might not be used properly, so have the correct use explained and practice.
Why Stihl Chainsaw engine runs roughly, misfires, temporary loss of power?
If your Stihl chainsaw engine runs roughly, misfires, or experiences temporary power loss, check the following: Ensure the spark plug boot is firmly attached; replace if necessary. Clean or replace a sooted or oily spark plug, and check the air filter if sooting recurs. Replace a loose ignition lead. Use the correct fuel/oil mixture, avoiding too much oil. Finally, ensure the air gap between the ignition module/control unit and flywheel is correct.
Why Stihl Chainsaw engine does not start easily, stalls at idle speed, but operates normally at full throttle?
If your Stihl chainsaw engine doesn't start easily, stalls at idle speed, but runs normally at full throttle, it could be due to damaged oil seals in the crankcase, requiring replacement. Alternatively, the crankcase might be leaking or damaged, necessitating sealing or replacement.
What to do if Stihl Chainsaw engine does not deliver full power or runs erratically?
If your Stihl chainsaw engine isn't delivering full power or is running erratically, consider these potential causes: worn or broken piston rings, which would need replacing; a carbonized muffler or spark arresting screen, suggesting cleaning or replacement; a dirty air filter, which should be cleaned or replaced; a kinked or torn fuel hose, which requires replacement or repositioning; or a decompression valve that isn't closed, which needs checking and possible replacement.
What to do if Stihl Chainsaw engine is flooded?
If your Stihl Chainsaw's engine doesn't start and you suspect it's flooded, clear the combustion chamber.
What to do if my Stihl MS 661 C-M engine does not start?
If your Stihl Chainsaw engine doesn't start, here are a few things to check: * Make sure you have sufficient fuel in the tank; if not, mix fuel and refuel. * If the engine is flooded, clear the combustion chamber. * If the carburetor is too hot, allow the chainsaw to cool down. * If the carburetor is iced up, allow the saw to warm up to +10°C.
General| Idle speed | - RPM |
|---|---|
| Motor type | 2-stroke motor |
| Chain pitch | 3/8 \ |
| Blade length | 800 mm |
| Product color | Black, Grey, Orange |
| Automatic oiling | Yes |
| Engine displacement | 91.1 cm³ |
| Power source | Gasoline |
| Sound power level | 118 dB |
| Vibration emission | 6.9 m/s² |
| Sound pressure level | 105 dB |
Weight and Dimensions| Weight | 7400 g |
|---|
