Originally posted by Homebrewer
Are you running an OS3 or OS8 plug? If not get one immediately.
Also, a rich mid-range is the result of a rich low end needle setting. Try leaning the low end a little at a time until it is running right. The OS .46 engine is the epitome of userfriendly and a poorly running one can only be the result of tuning, not design.
I am running an os 8 plug.
I went to get myself new fuel.
I've been storing it in the basement on the cement which I will do no more.