Run the tool with no load for 5 to 10 minutes to cool it down rapidly.

Lithium-Ion batteries should be stored in a cool, dry place. Do not use or store them in a high temperature environment. If a battery has been stored for 2 years without use, fully discharge it and then charge it up to 30%.

For all 2-stroke engines, the mixing ratio of engine oil and fuel is stated in the manual and on the machine body. Your equipment may vary, so checking the manual before adding the mixed fuel and oil is important. When you use the engine for the first time a higher oil mixing ratio is recommended.

The impact force of a rotary hammer and demolition breaker is created by the internal impact hammer striking the drill bit. When too much pressure is applied, the drill bit does not rebound in place and the impact is weakened. The correct amount of pressure should be applied to ensure proper functioning.

When the spark between the brushes and the commutator appears more often and brighter, it is time to replace the brushes. Damaged or worn carbon brushes may cause damage to the commutator.

Check if the piston / cylinder is well greased. Apply more grease if needed. Should the problem persist, check the O ring of the piston for wear and replace it if it is worn.