All,

I have a G26 in my Taylorcraft and as I haven't flown the plane for a little while, I decided to run up the engine yesterday.

I noticed that the idle is a bit rough and when I give full throttle, I get good RPMs but it doesn't seem to sustain the RPMs quite the way it used to. I also noticed that there is a bit of black residue on the cowling from the exhaust.

I have some 2 gallons of fuel through the engine

The needles have never been touched and I am reasonably sure I need to adjust both high and low end. What I'm not sure about is how. What would these symptoms indicate?

Any help would be greatly appreciated

Ari