background

Image 2 title

type your text for second image here

Image 2 title

Image 3 title

type your text for third image here

Image 3 title

Image 4 title

type your text for 4th image here

Image 4 title

Image 5 title

type your text for 5th image here

Image 5 title

Image 6 title

type your text for 6th image here

Image 6 title

Image 7 title

type your text for 7th image here

Image 7 title

Image 8 title

type your text for 8th image here

Image 8 title

Image 9 title

type your text for 9th image here

Image 9 title

Image 10 title

type your text for 10th image here

Image 10 title

Image 11 title

type your text for 11th image here

Image 11 title

Image title

type your text for image here

Image title

Image title

type your text for image here

Image title

Image title

type your text for image here

Image title

Image title

type your text for image here

Image title

Image title

type your text for image here

Image title

Image title

type your text for image here

Image title

Image title

type your text for image here

Image title
Willkommen, Gast
Benutzername: Passwort: Angemeldet bleiben:

THEMA: Engine problems: Lycoming TIO-540 1AFB

Engine problems: Lycoming TIO-540 1AFB 3 Jahre 3 Monate her #59

After a prop-strike I replaced my old engine (1980h) in my Mooney Bravo with a factory rebuilt engine. Right now the engine is in use for about 50h. The engine runs - like the old engine - quite well in cruise, but shows problems during run up test and take off:
- during run up it nearly always is quite rough on one magneto. The problem disapears after leaning for 30 sec with run up RPM.
- during take off (take off power, full rich) there is in 1 of 3 take offs a distinct roughness (easily detected even by passengers :-( ) lasting fo 10 to 90 seconds, which then disappears from one moment to the next moment. This happends typically but not always when reducing power. Power, manifold pressure and fuel flow are unchanged while it is rough. Fuel flow on take off is about 10% higher than with the old engine.

In cruise there are no problems at all.
I always lean as much a possible on when taxiing.
My maintenance shop (we could reproduce the problem one time on ground) changed twice some settings but the problem remains.

Are there any ideas for a cause or a fix (settings, plugs, oil, mechanical faults)?
Any parameter to watch, when it happend next time?
Any suggestion for a specialised engine shop, which can do detailed diagnosis?

Dieter
Der Administrator hat öffentliche Schreibrechte deaktiviert.

Engine problems: Lycoming TIO-540 1AFB 3 Jahre 3 Monate her #60

  • D-EMMK
  • D-EMMKs Avatar
  • Offline
  • Fresh Boarder
  • Beiträge: 4
Hello Dieter !
At first I have to say that I'm no mechanic or an expert at all. According to your description of the roughness on only one magneto, I suspect the problem is ignition related. I think your maintenance shop should check the magneto timing. Via google you can find a good article from AvWeb and some how-to videos on youtube. You maybe also could give the tempest fine wire plugs a try. They are in the United States highly reputated, but I personally have no own experiences. I also think your aggressive leaning is fine. If you want to make sure that you don't have any mechanical issue, send an oil sample to Blackstone Labs ( USA ). It won't cost you more than
25€ and will give you in case of a mechanical malfunction higher metal readings. We had one time also a very rough engine during magneto check with a decreasing EGT on one cylinder. It came out that it was a fouling Champion plug. I did some investigation and it seem to be a common problem with Champion plugs. Tempest plugs are the way to go. I also would post this question on mooneyspace.com. There are many experts with a lot of experience on Mooneys and engines.

Best regards
Lukas
Der Administrator hat öffentliche Schreibrechte deaktiviert.

Engine problems: Lycoming TIO-540 1AFB 2 Jahre 10 Monate her #143

  • mcewan
  • mcewans Avatar
  • Offline
  • Fresh Boarder
  • Beiträge: 2
Hi Dieter
Probably you resolved your problem by now. Just to let you know I have tried the fine wire plugs in my Acclaim and so far they are better. The engine (although it is the Conti) runs smoother and they are supposed to last a lot longer. See you in Leipzig.
Best regards
Rob
Der Administrator hat öffentliche Schreibrechte deaktiviert.

Engine problems: Lycoming TIO-540 1AFB 2 Jahre 10 Monate her #144

  • N51740
  • N51740s Avatar
  • Offline
  • Junior Boarder
  • Beiträge: 29
  • Dank erhalten: 3
Hi Dieter,
if fuel flow reads higher than normal and engine runs rough, the culprit may be injection adjustment. Too much fuel. The rough running on one mag comes then from "wet" plugs.
To check for this, before take off, run the engine max power with brakes on, and lean it aggressively to peak EGT for some seconds. Then full "rich" and std take off. If now you have a smooth engine, the problem is too much fuel. You may carefully lean it for take-off to get the right fuel flow to check further.
If the plane is inactive for prolonged periods, the plugs tend to misfire as well, in this case i do a run up with leaning as well and they come alive.

Sincerely yours,
Andreas
FR.66-009557
Der Administrator hat öffentliche Schreibrechte deaktiviert.
Ladezeit der Seite: 0.162 Sekunden