BTIZ wrote:

if installed properly.. the tach should be marked for non continuous
operation in a range somewhere between 1900 and 2200 RPM.. (don't trust my
memory.. look it up) I've flown a 3 bladed arrow.. and yes.. when you pull
the power back.. it does vibrate as it comes down through that RPM range..

Our tach was not remarked and there is no placarded prohibited range.
Ours vibrates from 2200 down to about 1200.


Matt