Ryobi RCS4640N - User Manual

Questions and Answers

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ldonovanAug 13, 2025
What to do if Ryobi RCS4640N Chainsaw engine will not start?
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  joseph76Aug 13, 2025
  If your Ryobi Chainsaw engine won't start, there could be a few reasons. First, check the spark plug for cracks or damage and replace it if needed. If that doesn't work, the engine might be flooded. To fix a flooded engine, turn off the ignition switch, remove the spark plug, move the choke lever to the run position, and pull the starter cord 15 to 20 times. Then, clean and reinstall the spark plug. Set the ignition switch to run, push and release the primer bulb 10 times, and pull the starter cord three times with the choke lever at run. If it still doesn't start, try the normal starting procedure with the choke lever at choke. If the engine still fails to start, repeat the procedure with a new spark plug.
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David ThomasAug 17, 2025
Why does my Ryobi RCS4640N Chainsaw engine not reach full speed and emits excessive smoke?
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  Aaron TerryAug 17, 2025
  If your Ryobi Chainsaw engine doesn't reach full speed and/or emits excessive smoke, several factors could be responsible. Be sure to use fresh fuel and the correct 2-stroke lubricant mix ratio. A dirty air filter can also cause this issue, so clean it. Also a dirty spark arrester screen may be the cause. In addition, the carburetor may require adjustment by a qualified service dealer.
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rodney63Aug 20, 2025
How to fix Ryobi RCS4640N Chainsaw when engine starts but will not accelerate properly?
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  Sandra Foster MDAug 21, 2025
  If your Ryobi Chainsaw starts but doesn't accelerate properly, it might be a carburetor issue. Contact a service dealer for carburetor adjustment.
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stephanie03Aug 25, 2025
What to do if Ryobi RCS4640N Chainsaw engine starts but will not accelerate properly?
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  kmunozAug 25, 2025
  If the engine of your Ryobi Chainsaw starts but won't accelerate properly, check for lubricating function. Run at half throttle for 30 to 45 seconds, then stop the saw and check for lubricant dripping from the guide bar. If lubricant is present, the chain may be dull or the bar may be damaged. If there's no lubricant, contact a service dealer.
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Robert SmithAug 28, 2025
Why are the bar and chain on my Ryobi RCS4640N Chainsaw running hot and smoking?
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  April LawrenceAug 28, 2025
  If the bar and chain on your Ryobi Chainsaw are running hot and smoking, it could be due to several reasons. First, check if the chain brake is engaged and release it if it is. Also, the chain tension might be too tight. Inspect the guide bar and chain assembly for any issues or damage.
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Michelle PrinceAug 31, 2025
How to adjust idle speed on Ryobi RCS4640N that starts, runs, and accelerates but will not idle?
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  Brianna BensonSep 1, 2025
  If your Ryobi Chainsaw starts, runs, and accelerates but won't idle, adjust the idling speed screw “T”. Turn it clockwise to increase the idling speed. If the chain turns at idle, turn the screw anticlockwise to decrease the speed. Remember to wear protective equipment and follow all safety instructions.
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davischristopherSep 5, 2025
What causes a Ryobi RCS4640N engine to start but not run properly at high speed?
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  russellbaxterSep 5, 2025
  If your Ryobi Chainsaw engine starts but doesn't run properly at high speed, the carburetor may require adjustment. Contact a service dealer for carburetor adjustment.
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Zachary CisnerosSep 8, 2025
What to do if Ryobi Chainsaw engine starts and runs, but the chain is not rotating?
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  rhaynesSep 8, 2025
  If your Ryobi Chainsaw engine starts and runs, but the chain isn't rotating, first check if the chain lubricant tank is empty and fill it. Also, check the chain tension to ensure it's not too tight.