Fragility of the product

The first use was conclusive: lightness of the brush cutter and cutting efficiency.
Unfortunately, the machine refused to shoot a few days. Yet the LED installed
on the handle indicates that she is on. This is not an overload, as shown in
a label attached to the handle, since it did not work when starting after a few days of non-use.
It's a shame because I liked it.
In the comments on this product, I read that some users complained of vibrations.
To avoid this problem, which in time can become dangerous, can be easily avoided by ensuring
good centering of the blade before tighten.