Diamond DA 40 Flight Manual page 148

Normal Operating
Procedures
Best Power Mixture
The mixture can be set for maximum performance at all power settings. The mixture should
first be set as for 'best economy'. The mixture should then be enriched until the exhaust
%
gas temperature is approximately 100 °F (55 °C) lower.
This mixture setting produces the maximum performance for a given manifold pressure
and is mainly used for high power settings (approximately 75 %).
END OF CHECKLIST
Page 4A - 32 Rev. 8 01-Dec-2010
DA 40 AFM
Doc. # 6.01.01-E