Break In Should I lean out my motor during break in?

[Jason74]

According to my spark plug and performance, I believe that I am running rich. However, I am still in the early break in phase (just started my second gallon of gas). Should I try to lean out my carb just yet or should I wait until the engine is a little further along?

Also, my fuel mileage is not very good (50 to 75 mpg). Will a rich running engine cause this or is it likely to be just a fact of life for my particular motor (49cc from Power King).

Thanks for the input,
Jason

 

[HoughMade]

Running rich will adversely effect fuel mileage. If you have determined that you are running rich, go ahead and adjust it, but go slowly- one notch, and see how it reacts.

 

[Skyliner70cc]

I adjust it from day one. No need to run a rich air/fuel mixture since most folks here run a very rich oil to gas mixture.