Sounds tough, Natty !! ^^^
On chainsaws - I've had 3 saws in my life, an older Homelite ( 1979 ) and 2 Stihls. I have a Stihl 390 w/ 20" bar and a Stihl 180C w/ 16" bar. I've never had a problem with the Stihls - but I maintain them well. A friend who owns an outdoor equipment business told me to only run premium gas in any outdoor equipment. I had sputtering, half-assed motor function with regular ( ethanol ) gas in my mower, snow blower, edger, etc. He was right. Premium gas ( and he recommended Sta-bil and marine grade fuel system cleaner per directions added to the premium gas ) made ALL the difference. Everything runs smooth as glass now.
All of my camp members ( save one ) run Stihl saws. They are easy to maintain, are only sold by servicing dealers ( if you need service ), and EAT wood. One camp member saw how our Stihl saws chewed logs while cutting firewood for camp, and got rid of his Poulan and bought a Stihl !!