Sweden here, using a Husqvarna in the forest and - when it works - a McCulloch on the farm. Lately it doesn't so the Husqvarna gets to see use there as well. Both are petrol saws, the McCulloch is about 15 years old, the Husqvarna 10. With these two I cut enough wood - only dead or storm-damaged trees - to heat the house and cook food. Apart from cleaning air filters, sharpening chains and replacing the fuel line every 3d or 4th year due to weakening (stock fuel line) or hardening (aftermarket fuel line) caused by ethanol in fuel I don't have to do much in the way of maintenance on these saws. The problems you describe - working on carburators and having to change fuel lines "every time" are often caused by leaving fuel in the tank after using the saw. This leads to gummed-up carburetors, if there is ethanol in the fuel it will damage gaskets and the fuel pump membrane, etc. When you're done using the saw for a while - a week or more? - empty out the fuel tank and run the saw until all fuel in the lines and carburettor is gone, that way it will probably just work next season. The same can not be said about battery-powered equipment which needs to be stored with a partly-charged battery to survive and which would probably need new batteries after 5-6 years (1/3 to 1/2 of the age of my saws).
