1.Find your nearest dumpster, and throw both of them in it.
2. Get online and research the right Stihl chainsaw for you.
3. Go to your local Stihl dealer and buy the saw you researched. Also get a gallon of Stihl bar oil, and a 6 pack of 1 gallon mix two cycle oil.
4. Buy ethanol free gasoline from the nearest supplier and mix your Stihl two cycle oil in it.
5. Enjoy your good chain saw.
Good advice;
I had about a 15 year old Craftsman bought brand new from Sears, started having issues with it and last year it died, gave it away on the forum.
I called a couple of small engine mechanics and they were $65.00 and up to tune it if that is the only thing it needed.
Me.
Wife was a great Santa and bought me a new Stihl.
Since I will not use mine very much I bought the gallon of Stihl pre mixed gas and bar oil. If you buy either the gallon of Stihl gas or their 2 cycle oil to mix you own gas, it doubles your warranty to two years.