Good Choice B4r, now do yourself another favor and go to the
Walbro website, find your local distributor, and order the
HDA-79-1 for the machine with an adjustable High speed side
on the carburetor. The 488 is a great machine that now suffers
from the same thing as the newer 026/260, no high side to
adjust.
I did the above on the advice of Rich Hoffman, and it changed the
machine greatly. It now runs (I'm guessing) about 12500 RPM.
IMO, it ran too fast/lean before, and should have had more power
in the cut. I sold the saw to my uncle to finance a 651, and he
loves it, runs an 18" bar without trouble. You will like the saw.
www.walbro.com