Hello Martin, I did the very opposite thing! Suspecting that it was the insufficient supply of fuel that caused the problem, I lifted the metereing needles all the way up from neutral (flush). This manoeuvre changed nothing except (predictably) making the plugs even blacker. The CHT behave normally. I am afraid the snag lies elsewhere, but many thanks for your suggestion.
Regards Jarek On Wed, 25 Dec 2019 at 22:30, Martyn Cook <[email protected]> wrote: > Hi Jarek > > Maybe now that you have blocked the air leaks around the throttle shaft > the engine is running a little rich? That would certainly reduce your peak > rpm. > > I have found getting the mixture correct on each side to be a bit tricky. > I adjusted the mixture on mine a bit at a time, watching the degree of > "blackness" on the spark plugs, plus the CHT behaviour. But I was taking > it for a flight then adjusting when back on the ground. > > Maybe others know of a way to get the mixture setting correct on the > ground? > > Kindest regards > Martyn > > -- > > > > On 26/12/19 9:37 AM, Jarek Steliga wrote: > > > > Hello everyone, > > I have replaced the throttle shafts and the throttle plates. Fortunately > it looks like no rebushing will be necessary. The engine became far more > stable now and responds precisely to throttle control inputs. Clearly the > badly worn out throttle shaft was (at least partly) where the shoe pinched. > However, strangely enough, the engine will not rev up beyond static 2500 > RPM. See the attached video. I am faced with yet another conundrum. > max static RPM 2500.3gp > <https://drive.google.com/file/d/17rdy2gc83H4FCpMXqlTOlBn-KBV8kVJA/view?usp=drive_web> > Also the engine will not respond to throttle control beyond ca 4 cm before > the max power position. > > I am not sure if it's safe for me to attempt a take off as before the > throttle repair, the engine had reved up to static 2600 / 2700. > > I am looking forward to your thoughts. > > Best regards > Jarek > > > > >
