Re: New guy from Boston
If you don't know how long the fuel mixture has been in the tank I would empty it first, drain the carb also to get as much old fuel out as possible . you said 49cc is it a two or four stroke? If its a two stroke the right pre-mix makes a difference, if its been run long enough to seat the rings most here run a mixture around 32/1 with a good 2 cycle oil designed for air cooled engines.
Your results may not be the same,Greg