Westerhuis
Active Member
Hi,
I have noticed an increase in the RPM drop when doing the mag check before take-off. I have a fuel injected IO-360 with dual P-Mags installed from new and now flown app. 685 hours.
I used to get an RPM drop of app. 90 on the right mag and 110 on the left mag (from 1600 RPM.) However, the last couple of days I am seeing a drop of 140 - 160 RPM on the left mag only and the right mag continues to drop by app. 90.
I have very recently installed a new throttle cable and had to make slight adjustments to the mixture / throttle setting to get the required tick-over RPM. I also had a CHT reading going off the scale on warm-up, and resolved that issue by replacing the CHT probe.
I do have an EI commander and haven't noticed any unusual readings (but I must admit, I didn't pay particular close attention to it)
Any idea what might cause the increased drop in RPM on the one mag?
Thanks!
Rogier
I have noticed an increase in the RPM drop when doing the mag check before take-off. I have a fuel injected IO-360 with dual P-Mags installed from new and now flown app. 685 hours.
I used to get an RPM drop of app. 90 on the right mag and 110 on the left mag (from 1600 RPM.) However, the last couple of days I am seeing a drop of 140 - 160 RPM on the left mag only and the right mag continues to drop by app. 90.
I have very recently installed a new throttle cable and had to make slight adjustments to the mixture / throttle setting to get the required tick-over RPM. I also had a CHT reading going off the scale on warm-up, and resolved that issue by replacing the CHT probe.
I do have an EI commander and haven't noticed any unusual readings (but I must admit, I didn't pay particular close attention to it)
Any idea what might cause the increased drop in RPM on the one mag?
Thanks!
Rogier
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