Went to fly my ovation (IO-550) today and on start up, above cylinders didn't fire.....worked throttle and mixture in and out a bit and eventually they came alive.....didn't go flying. Evidenced by a roughness and no EGT rise. I did do a high power run up and that was normal. Called my mechanic and going to look at it tomorrow.....our thinking is something in the fuel spider maybe?
Cylinders 5-3-1 didn't start right away
- Thread starter Getonit
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Checkout_my_Six
Touchdown! Greaser!
sounds like a fuel issue....good call.
SixPapaCharlie
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Sixer
I have had a similar (maybe or maybe not the same) issue in mine.
The prop spins and it is sort of chugging but it doesn't seem to "catch" so to speak and you are frantically doing this dance with the mixture and throttle trying to get it to really come alive..
My A&P watched me start the plane and said "You are not priming near long enough".
Instead of a 5 count, I am doing a 15 count. Hasn't happened since.
Could be totally unrelated but description sounds similar.
The prop spins and it is sort of chugging but it doesn't seem to "catch" so to speak and you are frantically doing this dance with the mixture and throttle trying to get it to really come alive..
My A&P watched me start the plane and said "You are not priming near long enough".
Instead of a 5 count, I am doing a 15 count. Hasn't happened since.
Could be totally unrelated but description sounds similar.
Bill Watson
En-Route
Nevermind (thought it was a hot start thread)
Last edited:
comanchepilot
En-Route
Was the fuel pump on? You could simply have air in the lines if you have not flown it in a couple weeks - doesn't take long for the fuel to evaporate - you could have had open intake valves on that side at shutdown - and everything just evaporated and you did not prime long enough.
Checkout_my_Six
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think about that.....for a moment.
Clark1961
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Each mag fires one plug on each cylinder...so yes they are on the same mags.
Clark1961
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Some folks have little knowledge of stuff hidden under the cowl.
Checkout_my_Six
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well....I thought maybe It could be a learning experience for me. I want to be teachable....ya know.
Clark1961
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Natural born optimist or 12 step?
Checkout_my_Six
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I'm now wondering what folks think about the "R" and "L" on the switch position.....
gkainz
Final Approach
R - RoseI'm now wondering what folks think about the "R" and "L" on the switch position.....
L - Lilac
R - Right Up Top
L - Lower than the Top
R - Right Bank
L - Left Bank
Checkout_my_Six
Touchdown! Greaser!
or right cylinders....and left cylinders?
Clip4
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Oh god.
Omalley1537
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Sean
You mean that key doesn't turn the airplane right or left? No wonder I am having trouble turning...
gkainz
Final Approach
I thought it stood for Rich or Lean ...
Bill Watson
En-Route
But I believe top plugs for 1-3-5 on on 1 mag, and bottom plugs on the other... could be meaningful if true.
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JustinD
Line Up and Wait
Maybe your engine decided to implement what some cars are doing these days
Shut off some cylinders if it doesn't need them at that point in time to save gas!
In all seriousness hope it gets squared away!
Shut off some cylinders if it doesn't need them at that point in time to save gas!
In all seriousness hope it gets squared away!
what I wanted to say was ,did you do a run up, mag check. but I had not had any sleep for 3 days .Irma went /was showing a direct hit over my house and attached hangar. IT DID! not much damage. lucky