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  #1  
Old 03-27-2016, 01:59 PM
acam37's Avatar
acam37 acam37 is offline
 
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Default Engine stumble

0320/E2G with 30 hrs SMOH. almost every flight it will momentarily stumble for a split second. It can best be described as a (bump). After that it runs fine the rest of the flight. It will only do it once. We changed both mags, wires, and plugs and it still does it. I cant figure out what could be causing this? The plane is going to Sun-N-fun which is 1000 miles one way. I would like to find out if this is a major issue or just an annoyance?
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  #2  
Old 03-27-2016, 02:06 PM
Kyle Boatright Kyle Boatright is offline
 
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Quote:
Originally Posted by acam37 View Post
0320/E2G with 30 hrs SMOH. almost every flight it will momentarily stumble for a split second. It can best be described as a (bump). After that it runs fine the rest of the flight. It will only do it once. We changed both mags, wires, and plugs and it still does it. I cant figure out what could be causing this? The plane is going to Sun-N-fun which is 1000 miles one way. I would like to find out if this is a major issue or just an annoyance?
Does it do that at a specific point in the flight? Throttle increase, throttle decrease, level off? Is this after 5 minutes of flying or later in flight?
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  #3  
Old 03-27-2016, 02:07 PM
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Mike S Mike S is offline
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Quote:
Originally Posted by acam37 View Post
0320/E2G with 30 hrs SMOH. almost every flight it will momentarily stumble for a split second. It can best be described as a (bump). After that it runs fine the rest of the flight. It will only do it once.
What conditions for the stumble??

I.E., first started, first leaned, switching tanks, when reducing power??

You need to find a pattern first, IMHO.
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  #4  
Old 03-27-2016, 02:22 PM
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Fred.Stucklen Fred.Stucklen is offline
 
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Default Stumble

Try switching your carb to a unit with a different 10- #. I had one doing this too.

Quote:
Originally Posted by acam37 View Post
0320/E2G with 30 hrs SMOH. almost every flight it will momentarily stumble for a split second. It can best be described as a (bump). After that it runs fine the rest of the flight. It will only do it once. We changed both mags, wires, and plugs and it still does it. I cant figure out what could be causing this? The plane is going to Sun-N-fun which is 1000 miles one way. I would like to find out if this is a major issue or just an annoyance?
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  #5  
Old 03-27-2016, 02:47 PM
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acam37 acam37 is offline
 
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Its random. Sometimes on climbout. Sometimes level flight. At different throttle settings. You never know when. The carb is the only thing that has not been replaced. Its weird.
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  #6  
Old 03-27-2016, 02:51 PM
PaigeHoffart PaigeHoffart is offline
 
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Have you drained your gascolator lately?
Just a thought.

Paige
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  #7  
Old 03-27-2016, 02:59 PM
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No gascolator installed. I sump the tanks every time I fly.
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  #8  
Old 03-27-2016, 05:10 PM
lr172 lr172 is offline
 
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You could try leaving the aux fuel pump on for the whole flight to rule out your pump/fuel delivery. Carb could have debris in bowl, but I would find it quite odd to only present itself once per flight and always once per flight. It also shouldn't present as a bump.

Ignition would have been my fist guess. Did you, by chance, examine and of the gears when you had the mags out? In ar recent post, a guy found a missing tooth on his idler gear. I forget the symptoms he reported, but worth a quick search.

Larry
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  #9  
Old 03-27-2016, 07:08 PM
donoltman donoltman is offline
 
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Default stumble

Had this happen to me for a year 0-320 E2d. Finally got sick of it and cored the carb in for an overhauled one. Hasn't stumbled in 3 months.
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  #10  
Old 03-27-2016, 09:20 PM
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Well, I sort of figured it may be a carb issue. All I did was disassemble and clean it.
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