Jabawocky
I can teach anyone to fly safely LOP in under 5 minutes, more like 2-3 minutes including a briefing and demonstration....it is as easy as level out in the cruise, (close your eyes for about 3 seconds while quickly moving the mixture leaner. As soon as you feel the deceleration - stop. Open eyes....This technique works at 500' and WOT/max rpm...how do I do it sans an EMS, the Big Mixture Pull works every time. And yes that is a carby engine.
That claim does not exactly dovetail with information on the GAMI website:
Not all GA engines can run safely LOP. Carbureted engines, for example, lack precise fuel/air metering systems and typically run rough and lose power LOP. And electronic engine monitors that show cylinder head and exhaust gas temperatures for every cylinder are necessary for safe LOP operations. Graphic engine monitors are even better.
...carbureted engines, and those without engine monitors, can and are being damaged from pilots running them too lean. “We’ve never had any issues with lean-of-peak operations in engines equipped with GAMI injectors and graphic engine monitors,” Middlebrook said. “But we’re also seeing burned valves and cylinder damage in carbureted engines or those with single-point EGTs trying to fly lean of peak. If you don’t have matched fuel injection nozzles and a six-point engine monitor, you just don’t have enough information for lean-of-peak operations.”