Greetings all.
Two weeks ago they installed a new “original Rotax Soft Start system “ on my 912 ULS engine with 350 hours. Type of aero plane: SportCruiser.
I made a 1 hour flight to my home base without a problem.
A few days later, when I did the run-up for a next flight, I found 800 RPM drop on the left magneto.
During run-up, Initially 3000 RPM on Both magnetos, 2200 RPM (oscillating between 2100 and 2300) running very roughly on Left magneto and 2950 RPM stable on Right magneto.
Running on Left magneto when setting power to idle, the engine stopped.
My technician who is used to work on Rotax , has checked the spark plugs and the plug wires.
He did not found malfunctions.
I started the engine once again, initially the RPM drop on the left magneto was still there.
After running 5 to 10 minutes and made the test on 3000 up to 4000 RPM, after some time both magnetos started to run normal.
We made a flight of prox. 25 minutes with no problems.
Made a run up test afterwards, no problem found.
Half an hour later, at the run-up for the next flight, again same problems with left magneto.
Running the test on 4000 RPM did not solve the problem.
Can somebody help me ?
Many thanks in advance.
Best regards,
Guy
Two weeks ago they installed a new “original Rotax Soft Start system “ on my 912 ULS engine with 350 hours. Type of aero plane: SportCruiser.
I made a 1 hour flight to my home base without a problem.
A few days later, when I did the run-up for a next flight, I found 800 RPM drop on the left magneto.
During run-up, Initially 3000 RPM on Both magnetos, 2200 RPM (oscillating between 2100 and 2300) running very roughly on Left magneto and 2950 RPM stable on Right magneto.
Running on Left magneto when setting power to idle, the engine stopped.
My technician who is used to work on Rotax , has checked the spark plugs and the plug wires.
He did not found malfunctions.
I started the engine once again, initially the RPM drop on the left magneto was still there.
After running 5 to 10 minutes and made the test on 3000 up to 4000 RPM, after some time both magnetos started to run normal.
We made a flight of prox. 25 minutes with no problems.
Made a run up test afterwards, no problem found.
Half an hour later, at the run-up for the next flight, again same problems with left magneto.
Running the test on 4000 RPM did not solve the problem.
Can somebody help me ?
Many thanks in advance.
Best regards,
Guy
