Which symptom may indicate improper chain tension during operation?

Which symptom may indicate improper chain tension during operation?

• A. Abnormal vibration
• B. Smooth operation with no vibration
• C. Decreased engine sound
• D. Softer grip on handle

Answer: (A)

Improper chain tension during operation usually reveals itself as abnormal vibration. When the chain is too loose, it can rattle and bounce on the bar as it bites into wood, creating noticeable vibration. If the chain is too tight, it may bind against the bar and drive system, also producing unusual vibration due to excess friction. Either way, abnormal vibration shows the chain isn’t moving cleanly on the bar. A chain that runs smoothly with no vibration suggests the tension is correct. Decreased engine sound isn’t a reliable indicator of chain tension, and a softer grip on the handle isn’t a direct sign of tension issues and could be caused by other factors.

Improper chain tension during operation usually reveals itself as abnormal vibration. When the chain is too loose, it can rattle and bounce on the bar as it bites into wood, creating noticeable vibration. If the chain is too tight, it may bind against the bar and drive system, also producing unusual vibration due to excess friction. Either way, abnormal vibration shows the chain isn’t moving cleanly on the bar. A chain that runs smoothly with no vibration suggests the tension is correct. Decreased engine sound isn’t a reliable indicator of chain tension, and a softer grip on the handle isn’t a direct sign of tension issues and could be caused by other factors.