Paul kgyy wrote:
My IO360 with CS prop is rated full power at 2700 rpm.

Actual RPM on takeoff is usually around 2615. Should I have the
governor adjusted, or is this appropriate margin to prevent overspeed?

Its not unusual for tachs to read wrong, but assuming its a correct
reading, I would have it adjusted. In the Mooney community we often try
to get the A&Ps to adjust it to 2800 RPM max. For a normal take off we
pull the blue lever back just a bit to keep it at 2700. But for a short
field take off (especially for Mexico operations) we'll push 2800 for
short periods of time. Also, the Mooney factory tells us that climbing
out at 2600 is very hard on the engine. Much of the cooling an IO-360
receives is from fuel and having the prop turn at 2600 reduces fuel
burn, which increases climb out temps interally. My IO-360 pulls 19
gal/hr in climb out and about 10 gal/hr in cruise.
The IO-360 engine is a bit unusual because Lycoming actually certified
it to run 2000 hours at sea level at 2700 RPM. There is no reason to
pull power back.

-Robert, M20F