Stihl MS 171 Questions & Answers

Stihl says used motor oil gives you skin cancer and it does not have the tackiness needed to stop sling off of oil from chain.

Sump oil will also damage or even kill living trees you cut or prune. Use canola oil, like many professional chainsawyers do

No only use bar oil best value in a 5 litre as has the stickiness required therefore the best lube for bar and chain

Hi, no switches just the starting switch to the left of the trigger, if you haven't used it for quite a few months it's possible the petrol has gone sour, which makes life very difficult, also make sure the air filter is clean and remove and clean the spark plug, its entirely possible that you simply flooded it. hope this helps, good luck.

Empty out old fuel, add new fuel mixed 50:1 with the correct 2-stroke oil. Then read manual on how to start this machine. It's an incredibly easy-starting, reliable machine. If you are still having a problem, see dealer, it's still under warranty most likely.