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Roland
Joined: 30 Nov 2009
Posts: 334
Location: EDLE
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 Posted: Mon Apr 09, 2012 10:44 pm Post subject: Rotax 914 fuel pressure |
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Fellow Rotax 914 Jockeys,
forgive me this odd question please.
I have my Europa stored in the trailer and was doing some avionic checks when I noticed the fuel pressure was almost nothing indicated on the conventional Rotax gauge with one pump running and only about 0,15 bar (not steady) with the boost pump switched on. The lower red line on the gauge is 0,25 bar. I can clearly hear both pumps running.
I don't know the aircraft that well since I bought it last year and thus cannot recall if that value changed. I also haven't tried yet with the engine running but my last flight was completely uneventful.
I regard that as a vital question and would appreciate your opinion on this item. Do I have to worry?
Roland
PH-ZTI XS Trigear
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davidjoyce(at)doctors.org
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| Posted: Tue Apr 10, 2012 12:26 am Post subject: Rotax 914 fuel pressure |
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Roland, The only reasons I have come across for low fuel
pressure in my 914 are fuel running out in main tank
(sorted by switching over to reserve) or gunge in the
gascolator (particularly happens early on when the initial
tank debris has not been all cleared). Others have
rerported rubbish in the in line original filters if you
have retained them rather than getting a gascolator, and
someone had a ball of dog hairs blocking the main exit
from the tank. It is certainly worth getting to the bottom
of it. You can easily check fuel flow by disconnecting the
fuel pipe prior to the carbs and running it into a jug.
Best of luck, David Joyce, G-XSDJ
On Mon, 9 Apr 2012 23:44:25 -0700
"Roland" <schmidtroland(at)web.de> wrote:
| Quote: |
<schmidtroland(at)web.de>
Fellow Rotax 914 Jockeys,
forgive me this odd question please.
I have my Europa stored in the trailer and was doing some
avionic checks when I noticed the fuel pressure was almost
nothing indicated on the conventional Rotax gauge with one
pump running and only about 0,15 bar (not steady) with the
boost pump switched on. The lower red line on the gauge is
0,25 bar. I can clearly hear both pumps running.
I don't know the aircraft that well since I bought it
last year and thus cannot recall if that value changed. I
also haven't tried yet with the engine running but my last
flight was completely uneventful.
I regard that as a vital question and would appreciate
your opinion on this item. Do I have to worry?
Happy (rest) Easter.
Roland
PH-ZTI XS Trigear
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=370426#370426
http://www.matronics.com/Navigator?RotaxEngines-List
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Roger Lee
Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.
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| Posted: Wed Apr 11, 2012 6:55 am Post subject: Re: Rotax 914 fuel pressure |
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You can attach an in line low pressure gauge to double check it.
Most of the time it's the fuel pressure sender. I would start with that and change it.
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_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056 |
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Roland
Joined: 30 Nov 2009
Posts: 334
Location: EDLE
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| Posted: Wed Apr 11, 2012 10:55 pm Post subject: Re: Rotax 914 fuel pressure |
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Okay - something embarrassing to admit and I can almost hear you all laughing at me. I take it as a man.
For those who do not know yet: Sufficient fuel pressure cannot be established without opening the fuel selector (which is certainly closed, when the aircraft is stored in the trailer).
Anyway thanks for your replies!
Roland
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max8992
Joined: 28 Jul 2011
Posts: 142
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| Posted: Wed Apr 11, 2012 11:46 pm Post subject: Rotax 914 fuel pressure |
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Hi Roland,
I don't think anyone will laugh, certainly not us flying LH and questioning
about the right position to switch fuel selector to reserve when short
petrol: no written indication, a bit of stress which could turn into panic
and engine starves... Fortunately it was a "what if" game between us and the
positive result was to put a scheme of the selector on the console between
seats before next fly.
Max Cointe
F-PMLH TriGear Kit #560
912ULS Airmaster 420 hours
mcointe(at)free.fr
-----Message d'origine-----
De : owner-rotaxengines-list-server(at)matronics.com
[mailto:owner-rotaxengines-list-server(at)matronics.com] De la part de Roland
Envoyé : jeudi 12 avril 2012 08:55
À : rotaxengines-list(at)matronics.com
Objet : Re: Rotax 914 fuel pressure
Okay - something embarrassing to admit and I can almost hear you all
laughing at me. I take it as a man.
For those who do not know yet: Sufficient fuel pressure cannot be
established without opening the fuel selector (which is certainly closed,
when the aircraft is stored in the trailer).
Anyway thanks for your replies!
Roland
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=370591#370591
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_________________
Max8992
Europa XS #560 F-PMLH |
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