what are the engine maker's specifications?
Continental O-200's are typically run at 2500 rpm continuous because that is an economical fuel burn. BUT look at the Continental engine specs and you find that the O-200 is actually certified for continuous operation at the redline of 2750rpm. that is you could run the engine for all of it's 2000 hours to TBO at redline and still be within maker's specifications ...which is not what most people would believe.
so don't solicit opinions, they may be nonsense, look at the manufacturer's published data for the engine and be guided by what they say.
O-300's have two more of the same cylinders used on O-200's.
Last edited by dubbleyew eight; 3rd Aug 2013 at 04:52.