Today's Message Index:
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1. 11:14 AM - Re: Fuel Pressure (Tim Yoder)
2. 01:20 PM - Re: Fuel Pressure (Gary Aman)
Message 1
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Bobby,
What aircraft do you have? If it is a high wing you shouldn=99t
have a problem with fuel starvation.
Is your facet pump in series or parallel with mechanical pump? With the
facet running I would expect you to see a increase in pressure.
I have steam gauges and no fuel pressure gauge but it is gravity fed.
Do you have a fuel filter that is dirty? Remove the fuel supply from the
carb and measure the fuel flow with the facet pump on. If the flow is
proper I would guess it might be the sender.
Give Pete at Jabna.com a call.
Tim
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of
BobbyPaulk@comcast.net
Sent: Saturday, January 27, 2018 2:04 PM
Subject: JabiruEngine-List: Fuel Pressure
Hope some of you Jabiru gurus are still lurking on the list.
I have 292 hrs on my 3300. Over the last year the fuel pressure has
slowly dropped.
At Cruise it is 1.8 steady but will sometimes dip to 1.1. At run up (
1200 to 1700 ) it will vary between 1.0 and 2.3.
It is very unsettling to get a low pressure alarm on takeoff roll even
with boost pump on it drops to .9 at times. I have recently dropped my
low pressure alarm from 1.5 to 1.2. It will usually come back up to 1.8
after throttling back to about 2700 rpm.
The electric fuel boost pump is only 3 yrs old but the engine pump is
original 11 yrs old.
Is there a time recommendation for changing out the engine pump and / or
the boost pump. The boost pump was bought at NAPA.
The engine fuel pump I believe is BCD1875 modified by Jabiru.
Electric boost pump is Facet FAC40105. Should be 3 to 4.5 psi.
My fuel pressure transducer is 0 to 60 psi. and I am wondering if that
could be all of my problem.
Dynon recommends 0 to 10 or 20 psi.
Any help will be greatly appreciated.
Bobby
Coming up on age 80
Message 2
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| Subject: | Re: Fuel Pressure |
would look first at the fuel transducer.I have 10 years and 1000+hrs on
my original facet and factory pump using only 100 octane on my 2200 A
> On Jan 27, 2018, at 4:03 PM, BobbyPaulk@comcast.net wrote:
>
> Hope some of you Jabiru gurus are still lurking on the list.
> I have 292 hrs on my 3300. Over the last year the fuel pressure has
slowly dropped.
> At Cruise it is 1.8 steady but will sometimes dip to 1.1. At run up (
1200 to 1700 ) it will vary between 1.0 and 2.3.
> It is very unsettling to get a low pressure alarm on takeoff roll even
with boost pump on it drops to .9 at times. I have recently dropped my
low pressure alarm from 1.5 to 1.2. It will usually come back up to 1.8
after throttling back to about 2700 rpm.
> The electric fuel boost pump is only 3 yrs old but the engine pump is
original 11 yrs old.
> Is there a time recommendation for changing out the engine pump and /
or the boost pump. The boost pump was bought at NAPA.
>
> The engine fuel pump I believe is BCD1875 modified by Jabiru.
> Electric boost pump is Facet FAC40105. Should be 3 to 4.5 psi.
>
> My fuel pressure transducer is 0 to 60 psi. and I am wondering if that
could be all of my problem.
> Dynon recommends 0 to 10 or 20 psi.
>
> Any help will be greatly appreciated.
>
> Bobby
> Coming up on age 80
>
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