dave54 wrote:
It took mine a few weeks after I bought them to smooth out.
My local small engine repair guy (in business 50 years and been to all the factory schools) tells all his customers to use mid range or premium fuel in the small two-cycle engines. By law they have to be able to run on the regular gas, and they do. But in the long run the engine will last longer, require less maintenance, and start easier in hot/cold/damp weather if you use the higher octane blends. And use brand name gas, not the stuff a few cents cheaper from 'Joes Discount Fuel'. You don't know who supplied it, where it came from, or how old it is. You car's computer will automatically adjust spark, timing and mixture the match the fuel. The two cycle engines do not do that.
So I put regular in my car tank, and mid range in my gas cans.
My Honda 2000 is a four stroke. Mine idles fine with no rough idle after it is warmed up.