Pour out that old stuff,put you full tank of high test in it[of course mixed right with a good mix oil,I use echo oil],that would be number one,,than check your air filter,clean it,,if you wash it in soapy water,,rinse very good and let dry all the way before putting it back on,,that would be number 2.,,,than you would be ready for maybe 3 and 4!:drunkie: