Tue Sep 11, 2018 10:30 pm
#1637530
Flyin'Dutch' wrote:Maybe their lawyers advised them that a 65% recommendation was more likely to avoid claims than the earlier statement.
For normally aspirated engines, the 65% recommendation in the article in your link has nothing to do with leaning, over- or otherwise:
Lycoming wrote:For maximum service life, maintain the following recommended limits for continuous cruise operation:
Engine power setting – 65% of rated or less.
Cylinder head temperatures – 400˚ F. or below.
Oil temperature – 165˚ F. – 220˚ F.
I can't see any references to 65% in the context of leaning technique other than the bit about supercharged engines I mentioned.