I'd like to throw this one out to the group... The tach reads 2150 rpm at full throttle just before take off. As I start to roll down the runway the rpm"s DECREASE to about 2000. and stay right there . The tach should read around 2300 on the climb out, and at one time it did. However, it stays at 2000 until I reach cruise altitude, around 2300 ft. After leveling off and building rpm and normal cruise of 2450 rpm, I can get 2650 at full power. Now when I want to climb higher, I can get 2300 rpm in the climb. I have called Continental, most everyone I know who own coupes and have tried all of the fixes that were offered. Checking the carb heat box, calibrating the tach, and checking mags and plugs. I have almost 1000 hours in my coupe and I thought I could troubleshoot about anything but this has me stumped.....The prop is a 7148 climb prop, and as far as I know I haven;t made any changes to cause this... Any suggestions?????????
Bill Coons 99822.
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