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hansjd(at)online.no
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 Posted: Tue Apr 09, 2013 12:25 am Post subject: VS: Europa-List: Drop in RPM/Mag drop |
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Hi Rotax gurus:
I posted this problem on the Europa list, but was adviced to post it here. Hope someone can be of help.
Rgds, Hans
| Quote: | From: Hans Joergen Danielsen [hansjd(at)online.no]
Sent: 2013-04-08 18:00:25 CEST
To: europa-list(at)matronics.com
Subject: Europa-List: Drop in RPM/Mag drop
Engine Gurus!
The engine (914) of the Europa I built, and subsequently sold is not up to acceptable standards. The new owner experienced a drop in RPM combined with a cracling noise in the head set. The Flydat also went temporarly black. He was barely able to maintain altitude and on return to the airfield he switched on the secondary fuel pump. After awhile the engine regained power. In the heat of the moment he forgot to check the fuel pressure when the engine was faltering.
During investigation we experienced a slight delay on initial switching of the fuel pump - till we heard the familiar sound of the pump. During later switching everything was normal.
We have tried everything - jigling contacts with pump running, changing to another switch on the panel and even checked the battery itself, to no avail. We are about to run out of ideas.
This may be a separate snag in itself. When running the engine the Mag drop was unaceptably high - 400 rpm on Left and 300 rpm on Right magneto. We regapped the plugs to 0.70 mm, but no effect. We noticed though that both plugs on Cylinder 1 were black with soot while all the others were normal grey. After cleaning the plugs and running for a few more minutes, the plugs got all black again. What could this be - a compression leak? I am ruling out the carburetor, since the plugs on the other cylinder on the same side - which is being fed from the same manifold - was normal grey.
I'm tossing out these problems to all you knowledgeable people in the group. Any with a good advice??
Cheers, Hans - ex LN-HJD
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hansjd(at)online.no
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| Posted: Tue Apr 09, 2013 4:38 am Post subject: VS: Europa-List: Drop in RPM/Mag drop |
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| Quote: | From: Hans Joergen Danielsen [hansjd(at)online.no]
Sent: 2013-04-09 10:24:17 CEST
To: rotaxengines-list(at)matronics.com
Subject: VS: Europa-List: Drop in RPM/Mag drop
Hi Rotax gurus:
I posted this problem on the Europa list, but was adviced to post it here. Hope someone can be of help.
Rgds, Hans
> From: Hans Joergen Danielsen [hansjd(at)online.no]
> Sent: 2013-04-08 18:00:25 CEST
> To: europa-list(at)matronics.com
> Subject: Europa-List: Drop in RPM/Mag drop
>
> Engine Gurus!
>
> The engine (914) of the Europa I built, and subsequently sold is not up to acceptable standards. The new owner experienced a drop in RPM combined with a cracling noise in the head set. The Flydat also went temporarly black. He was barely able to maintain altitude and on return to the airfield he switched on the secondary fuel pump. After awhile the engine regained power. In the heat of the moment he forgot to check the fuel pressure when the engine was faltering.
>
> During investigation we experienced a slight delay on initial switching of the fuel pump - till we heard the familiar sound of the pump. During later switching everything was normal.
>
> We have tried everything - jigling contacts with pump running, changing to another switch on the panel and even checked the battery itself, to no avail. We are about to run out of ideas.
>
> This may be a separate snag in itself. When running the engine the Mag drop was unaceptably high - 400 rpm on Left and 300 rpm on Right magneto. We regapped the plugs to 0.70 mm, but no effect. We noticed though that both plugs on Cylinder 1 were black with soot while all the others were normal grey. After cleaning the plugs and running for a few more minutes, the plugs got all black again. What could this be - a compression leak? I am ruling out the carburetor, since the plugs on the other cylinder on the same side - which is being fed from the same manifold - was normal grey.
>
> I'm tossing out these problems to all you knowledgeable people in the group. Any with a good advice??
>
> Cheers, Hans - ex LN-HJD
>
>
>
>
>
>
>
>
>
>
> <pre><b><font size=2 color="#000000" face="courier new,courier">
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>
> </b></font></pre>
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<pre><b><font size=2 color="#000000" face="courier new,courier">
| | - The Matronics RotaxEngines-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RotaxEngines-List |
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