If you have an old Homelite XL 12, Super XL, Super EX or other old Homelite, it runs on a 16:1 ratio. Do not alter the ratio just because your brand new Husqvarna or Stihl runs on 50:1.
The secret to longevity on these engines is correct fuel mixture. And don't ever run it again on pure gasoline.
Good luck.
Lane Dexter
June 2007