For the past year we have been working on my My Rotax. During the take off roll the engine seems to increase RPM although no RPM increase is noted. Initially I was told to rebuild the gear box. This has been done twice. It still does it. It always does it on the take off roll at about 140 degrees. We checked the throttle springs to see if it was giving way but no change. Again it is always doing it at the same time. We have synced the carbs rebuilt the gear box. here is a you tube link to a take off roll with the sound of it. it occurs at 54 seconds https://www.youtube.com/watch?v=VIV2nnMe6T4. It never does it after the first take off or when the temp is over 145
Please help. We have taken advice and checked all sorts of things.
Please help. We have taken advice and checked all sorts of things.
