Finishing up 25 hr inspection today with carb sync. One thing I haven't been able to get rid of - despite correcting other mistakes (carb sync, prop pitch out on two blades, idle mixture not set right :oops: ) is a rough spot at ~2500 rpm. Smooth idle at 18-2000 and smooth again at 4000-5400. Any thoughts?
k
Rough 2500 Rotax
- KevinC
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Re: Rough 2500 Rotax
There's often a rough range due to prop/engine harmonics I think.KevinC wrote:Finishing up 25 hr inspection today with carb sync. One thing I haven't been able to get rid of - despite correcting other mistakes (carb sync, prop pitch out on two blades, idle mixture not set right :oops: ) is a rough spot at ~2500 rpm. Smooth idle at 18-2000 and smooth again at 4000-5400. Any thoughts?
k
Some planes even placard it, like one of the Franklin 6 cylinder engines.
It's an RPM range that's just got to be avoided...