https://www.thespruce.com/stihl-vs-husqvarna-chainsaws-2218119Maintenance
Due to the potential danger of using a chainsaw, maintaining the chainsaw by making repairs, sharpening the chain, cleaning the fuel tank, or
oiling the chain is important and necessary for ensuring that the tool continues to work properly, reducing the risk of part failure during use.1 In general, Husqvarna chainsaws tend to require more frequent maintenance than Stihl chainsaws, widely attributed to superior Stihl engineering.
For DIYers and professionals who usually complete brief tool checks before and after use with more substantial maintenance at scheduled intervals, Stihl chainsaws are the best choice because the time between maintenance intervals is longer. However, this consideration doesn't apply to users who routinely check and perform maintenance on their chainsaws every time they use the tool. Also, certain tools can reduce maintenance time, like
electric chainsaw sharpeners.