On Thu, 12 Feb 2004 19:02:46 GMT, Chuck
wrote:

Hi, all,

All rpm indications were within spec (for static run-up, etc). When on
the takeoff roll, rpm was about 2100, which seemed low, but there is
no spec in the POH for rpm for the takeoff roll. The rpm went much
higher after we were cruising (2300 or so).

Also, there was a "burbling" sound from the exhaust.

The prop was removed, inspected and put back on (with pleanty of
scratch marks which weren't there before.


Are you sure they put the correct prop on the plane? I know some of
the new 172 series were produced with 160hp and others with 180hp.
Although you have to hope the mechanics did a better job - if you have
a 160hp it is possible they swapped props with a 180hp 172.

A cruise prop would drag down both the static RPM and climb
performance. On the other hand, you should notice a few mph
improvement in cruise (unless the prop is grossly wrong).

-Nathan