Petrol leaf blower series makita bhx power 810 watt power hp 11 hp displacement 25 cc engine cycles 4 stroke max revolution 7 800 rpm power supply petrol suction power 606 mh blow speed 232 kmh function blow start system recoil start tank capacity 052 litres weight 45 kg noise emission 1037 db length 231 cm width 35 cm height 368 cm vibration 93 ms