"Peter Duniho" wrote in message
...
Nope, that's not it. It was a little windy that day, but the sound was
far
too regular to be any sort of response to wind gusts.
Anyone have any thoughts on what to do if nothing is found?
As an intermediate step, it occurs to me that even though the oil was just
changed,

Did the plane just have an inspection? Was the fuel filter/gascolator
inspected/cleaned? Whenever my plane just comes out of an annual
I have to run it for a bit to get the air out of the fuel lines. Can also be
bubbles when it's hot but I guess you know that. Usually disappears
by the time I complete the run-up, but if I were quick I guess I could
take it into the air.

Paul