If the HandyMower keeps switching off during operation, this could be related to the angle of the bar. The angle must be between 22° and 70°. If the angle is smaller or larger, the appliance will be switched off for safety reasons.
You should also check that the union nut connecting the handlebar to the appliance is correctly and firmly tightened.
You should also check that the union nut connecting the handlebar to the appliance is correctly and firmly tightened.