Future RV 9 Flyer
Active Member
I have a problem with my 9A.Engine is a Lycoming Io-320 with Airflow Performance FM 150 and dual P-mags timed 2 Teeth past TDC.3.8 hours on the engine burning 91 octane non ethanol auto gas.First 2 hours the engine ran fine but now it doesn’t want to idle smoothly.Erratic idle at 700 rpm and if I advance the throttle to about 900-1000 rpm it drops 100 rpm every 3-4seconds.Full throttle it runs strong.Static full throttle rpm is 2200 rpm.Exhaust pipes are black on the inside.Seems to me it is running too rich at idle.I turned the idle adjustment link 2 flats to shorten it but it didn’t seem to make much difference.Did I just not lean enough?Do I have an induction leak?Any ideas out there why my engine wont idle smoothly?Thanks. Dave