Small Engine Problems? Ask an Engine Mechanic for Answers ASAP
Hi, I'm Waldemar,
How old is your chainsaw and how much you are using it?
Before you change the brushes it is good to check the chain tension and the oil.
The chain is correctly tensioned if it does not sag at the rail underside and can be rotated completely around with the gloved hand. When the saw chain is tensioned with 9 N (approx. 1 kg), the gap between the saw chain and the guide rail may not be more than 2 mm.
Chain oil travels from the tank via a tube, then runs into the guide bar and the groove where the chain moves round the guide bar. If the chain does not oil, it may be clogged with wood shavings and dirt, or there may be a blockage in the line from the chain-oil tank to the bar. Make sure you clean the chainsaw thoroughly after each use. If this does not work, run the saw without the bar to see if the oil is being pumped out of the tank.
Let me know how it goes.
Try to continue the same question to avoid that system will repeat the same initiation, don't need to start new one.
So, let's do some checks:
1. The oil is ok and you are using the recommended low adhesive oil. It is important that oil does not generate some adhesion that will reduce the speed.
2. Check the voltage of the power source is in accordance with the equipment label. If you have some problem with power it can cause lower voltage and lower speed of electric motor.
3. Check the chain brake. Release the chain brake by shifting the brake arm over against the front grip. If the brake is malfunctioning, it can lower the speed of motor.
If everything is fine and speed will not come back then it would be good to start checking the motor itself: changing brushes, clean commutator.
I hope something works.
You can find here https://www.mrcarbonbrush.com/Florabest__FKS_2200_B1_chainsaw/p2644628_16523023.aspx
Let me know if you need further help.
If you don't mind, please, rate my answer with 4 or 5 stars.