How many SR22 Owners have experienced propellor vibrations or Tach/governor problems.
My aircraft (s/n 17) needed an adjustment to the governor. It was nearly 100 RPM low.
I noticed the problem in two ways. First during the runup, the tach never hit 2,000. Secondly, when the RPM leveled off as the trhottle advanced, this should have been at 2,500, but was at 2400.
I checked whether it was the tach or governor by running up to full power on the ground with the brakes on (like a short field technique). The RPM should be 2740. If it is, the Tach is probably accurate.