Hi all,

I have a curious problem with my 912 UL since januar 2021 on each fly : a short engine speed decrease of 1 or 2 seconds the first time (and only the firstt time)  I open throttle fully. After these two seconds, the engine run normally for the entire flight. The spark plugs are new, the oil changed, recently synchronized carburetors, no leaks found, no other engine problem. Somebody has an idea where I can search ?


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