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Rotax 582 high EGT's

 
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NebraskaYak



Joined: 02 Sep 2008
Posts: 31
Location: Nebraska

PostPosted: Sun Apr 11, 2021 6:32 pm    Post subject: Rotax 582 high EGT's Reply with quote

Hi All,

Just got my 582 powered plane out after winter hibernation. Everything was fine when we parked it and now both EGT's are trending high, right up to 1200 on takeoff and over 900 at 3000rpm. Never saw them so high before. Rebuilt fuel pump, checked carb floats, new fuel lines and filter, fresh gas and swapped egg gauge with no changes. Any ideas what would cause both to be so high all of a sudden?

Thanks for the help!
Andrew


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williamtsullivan(at)att.n
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PostPosted: Sun Apr 11, 2021 6:47 pm    Post subject: Rotax 582 high EGT's Reply with quote

Is it fresh gas?

Bill Sullivan

On Sunday, April 11, 2021, 10:34:47 PM EDT, NebraskaYak <andrew.malousek(at)comcast.net> wrote:




--> RotaxEngines-List message posted by: "NebraskaYak" <andrew.malousek(at)comcast.net (andrew.malousek(at)comcast.net)>

Hi All,

Just got my 582 powered plane out after winter hibernation. Everything was fine when we parked it and now both EGT's are trending high, right up to 1200 on takeoff and over 900 at 3000rpm. Never saw them so high before. Rebuilt fuel pump, checked carb floats, new fuel lines and filter, fresh gas and swapped egg gauge with no changes. Any ideas what would cause both to be so high all of a sudden?

Thanks for the help!

Andrew

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NebraskaYak



Joined: 02 Sep 2008
Posts: 31
Location: Nebraska

PostPosted: Sun Apr 11, 2021 6:55 pm    Post subject: Re: Rotax 582 high EGT's Reply with quote

yep, drained and filled with fresh premix

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williamtsullivan(at)att.n
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PostPosted: Mon Apr 12, 2021 6:13 am    Post subject: Rotax 582 high EGT's Reply with quote

My only other thought is to check your connections. Oxidation would cause a change in electrical resistance. Pull the plugs, and clean the contact surfaces.

Bill Sullivan

On Sunday, April 11, 2021, 10:56:22 PM EDT, NebraskaYak <andrew.malousek(at)comcast.net> wrote:




--> RotaxEngines-List message posted by: "NebraskaYak" <andrew.malousek(at)comcast.net (andrew.malousek(at)comcast.net)>

yep, drained and filled with fresh premix

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skyguynca



Joined: 05 Jun 2006
Posts: 128

PostPosted: Mon Apr 12, 2021 7:03 am    Post subject: Rotax 582 high EGT's Reply with quote

Seals are leaking, crankshaft seals probably. It will suck in air past the
seals and cause you to run lean.
They dry out and start leaking after years of being installed. Doesn't
matter how many hours. Long sits during winters without being preserved
properly can be the culprit too.

David

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ppsel03



Joined: 23 May 2014
Posts: 9

PostPosted: Tue Apr 13, 2021 4:51 am    Post subject: Re: Rotax 582 high EGT's Reply with quote

NebraskaYak wrote:
Hi All,

Just got my 582 powered plane out after winter hibernation. Everything was fine when we parked it and now both EGT's are trending high, right up to 1200 on takeoff and over 900 at 3000rpm. Never saw them so high before. Rebuilt fuel pump, checked carb floats, new fuel lines and filter, fresh gas and swapped egg gauge with no changes. Any ideas what would cause both to be so high all of a sudden?

Thanks for the help!
Andrew


Assuming you've 2 plugs per cylinder, One of the mags is not sparking. Unburned fuel is burning in the exhaust.


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Guy Buchanan



Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

PostPosted: Wed Apr 14, 2021 3:17 pm    Post subject: Rotax 582 high EGT's Reply with quote

Check for an air leak at the boots. Unfortunately your crank seals may
have dried and allow air to pass. There's a way to check but I don't
remember it. I think there's a spec for crankcase vacuum or manifold
vacuum that might tell you something about leakage.

On 4/11/2021 7:32 PM, NebraskaYak wrote:
Quote:


Hi All,

Just got my 582 powered plane out after winter hibernation. Everything was fine when we parked it and now both EGT's are trending high, right up to 1200 on takeoff and over 900 at 3000rpm. Never saw them so high before. Rebuilt fuel pump, checked carb floats, new fuel lines and filter, fresh gas and swapped egg gauge with no changes. Any ideas what would cause both to be so high all of a sudden?

Thanks for the help!
Andrew


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=501356#501356



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Guy Buchanan
Deceased K-IV 1200
A glider pilot too.
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