All pieces of power equipment will vibrate some during operation. If a unit vibrates excessively, we need to make sure that the unit is running at full throttle. If the unit continues to vibrate excessively, this is a definite sign that there is something wrong. DO NOT continue to operate the unit.
Excessive vibration can cause fasteners to loosen and risk parts falling off.
This vibration can also weaken components causing them to crack and break. At this point you would need to inspect these components, or have an authorized service dealer inspect and repair the unit for you. If you didn't find a question related to your problem, please check out the troubleshooting section for your product.