Archer Tach Red Arc

does this archer have the standard engine installed?? then I would not think
that there was an RPM limitation.. if there was an STC for a larger or
different engine prop combination, then that may require the red arc area...
and I agree.. this sounds like something from an Arrow with 3 prop blades..
if there is no documentation of the requirement in the aircraft logs.. then
it is an improper marking on the glass face..

BT

"Greg Esres" wrote in message
...
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?