Most pilots, even CFIs, don't understand how to properly configure engine for various altitudes on a simple Piper Archer. The advice of "full rich below 3000" is simply wrong. Below is a simplified procedure based on the POH. It will ensure better performance, longer range, and longer engine life. The advice of "lean until running rough, then add some" is better, but still imprecise. First, see POH section 4.27 CRUISING on how to configure engine. Simplified procedures Climb Mixture, throttle full forward Note the EGT temperature just after takeoff As you climb EGT will drop (too rich). Every 500 or 1000', lean mixture slightly to raise EGT back to the temperature you noted on takeoff. DO NOT allow temperature to get higher than this! At 6000' lean much more to get peak EGT. Note the temperature. Every 600 or 1000' above 6000' are-lean mixture to get back to peak EGT. Best Power Cruise (fly fast): Mixture, th...
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