GTX 300 LImited Cutting the RPM

[acipriano]

I would like your help if you can give me a light, since in Angola we are in need of qualified mechanics. I have a gtx 300 2017, he when accelerating at once, he is cutting the spin, he accelerates to 3000 rpm, suddenly drops the rotation, as if I had decelerated. But if I accelerate slowly he will walk and I can walk at 5,000 5500 rpm around, if I press a little more to go up to 6000 rpm and run more, it cuts. This happened after the penultimate time, 2 coke caps, were between the propeller and the tube, it seems to me that this cut is giving when there is an immediate force on the propeller, as if accelerating at once it receives a strength and failure .. I can't get past 6,000 spins, nor can I get out quickly in sport or touring mode. The GTX is new with 19 hours.