The oil/petrol ratios differ from machine to machine. Always refer to the engine manual. If you have a 2-stroke engine our fuel mixing bottle, measures the exact amounts needed, but it is important to remember to only mix enough fuel needed per cut.

The twigs and branches may be too thick. Check that both levers are gripped firmly (if it has a double lever handle). The machine is a trimmer, not a cutter. Do not use it to cut thick branches.