On Tue, 18 Jan 2005 02:40:13 GMT, Greg Esres
wrote:

A student has an Archer II that has a red arc painted on the glass of
the tach between 2150 and 2350 RPM. The POH makes no mention of a red
arc.

I'm thinking that either the tach came out of an Arrow (which has a
red arc in this range) or some A&P confused the Archer with an Arrow
and painted it on.

Does anyone know of any legitimate reason for an Archer to have a red
arc, other than max RPM?

The older Cherokee 180s had the O-360-A3A engine with the hollow crank
shaft. There was a prohibited RPM range at approx 2150-2350.

I would bet the tach is out of one of these 180s.

-Nathan