Ernie, on said page it states: LEANING WITH A CESSNA ECONOMY MIXTURE INDICATOR (EGT)... (would have to say a far cry from an engine analyzer)
1st paragraph talks about 75% power or less and references figure 4-4 EGT table and recomended lean of 50% rich of peak.
**Opps, the above should read 50 degrees F Rich Of Peak EGT**
2nd paragraph says: Continuous operation at peak EGT is authorized ONLY at 65% power or less. This best economy mixture setting results in approximatly 8% greater range than shown in this handbook accompanied by approximatly a 4 kt decrease in speed.
Then there is a note: Operation on the lean side of peak EGT is NOT approved.
Hey, what can I say, I am the end user, this is what is in my POH... Cessna Model 337 G Ser.# 1805... Guy. old72driver....
What year is yours Ernie? The front of my POH states 1977 MODEL 337G