Abstract: A self-powered brush cutter provided with a carrier having motorized ground engaging elements mounted via tandem arms, an articulated boom and a cutter head attachment. The articulated boom includes an angular adjustment mechanism to adjust the angle of the cutter head attachment and to maintain this angle. The cutter head attachment includes a rotary blade and blade guards partially enclosing the plade and provided with apertures that are so configured as to allow the passage of a potentially damage blade.