Take a small rubber mallet, and gently rap on the muffler. If there is
anything loose inside, then its time to take it off and look inside.
MikeM


On Fri, 15 Aug 2003 09:18:12 -0400, "Bob Chilcoat"
wrote:

My partners and I have all noticed that takeoff roll and climb in our Archer
is a bit long and anemic, respectively. The partner who has had a share the
longest has said that normal TO RPM has always been around 2,250. One of us
recently flew a Cherokee 180 (same engine) that climbed much better and got
over 2,500 RPM during TO. We have roughly 1,500 SMOH on the engine, and
compressions are all in the 70's. Someone on the Piper group suggested that
the muffler might be plugged. The POH says nothing about normal static RPM.
Any thoughts?