Today's Message Index:
----------------------
1. 08:16 AM - Re: air entering fuel system on suction side - or is my Pierburg electrical pump broken? (Sacha)
2. 08:43 AM - Re: air entering fuel system on suction side - or is my Pierburg electrical pump broken? (william sullivan)
3. 10:05 AM - Re: air entering fuel system on suction side - or is my Pierburg electrical pump broken? (John Hauck)
4. 12:17 PM - Re: air entering fuel system on suction side - or is my Pierburg electrical pump broken? (Sacha)
5. 03:35 PM - Magnetic plug torque (Damien Graham)
6. 05:19 PM - Re: Magnetic plug torque (Damien Graham)
7. 06:40 PM - Re: Magnetic plug torque (Roger Lee)
8. 10:11 PM - Re: Cylinder head coolant leak? (Richard Girard)
Message 1
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| Subject: | air entering fuel system on suction side - or is |
my Pierburg electrical pump broken?
Hi Bill,
I took the header tank off today, emptied and cleaned it. It had some
silicon gasket material left over from when I installed the fuel level
sender. Occasionally bits would float around and block the exit orifice and
cause fuel flow to slow down substantially, exactly as you described. I
expect things will go back to normal as soon as I re-mount the tank.
Thanks again for the help!
Regards,
Sacha
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of william
sullivan
Sent: Sunday, 22 June, 2014 14:27
Subject: Re: RotaxEngines-List: air entering fuel system on suction side -
or is my Pierburg electrical pump broken?
--> <williamtsullivan@att.net>
Sacha- I can think of a couple of things to check before blaming the pump.
First, are the tanks vented? Are the vents functioning? Second, make sure
that there isn't something blocking the fuel intake. I had this problem
once on a new piece of equipment with a diesel engine. It would sit and run
at full throttle for hours, but if it went down the street it would suck
air, and shut the engine down. It drove us nuts for a while, until we
pulled the fuel tank and found a 1" square piece of masking tape drifting
around in the fuel. When it sloshed over to the sucker tube, it blocked it
and shut down the engine. Air in the fuel always makes me think of that.
We found it by pulling the plug at the bottom and trying to drain it. The
fuel would stop running. Poke a wire in there, and it would run again. It
was invisible when soaked with fuel. We had to pull the tank to get it out.
The tape had been used to cover all openings when shipped from one factory
to another, and a piece dropped in when the manufacturer pulled it off.
Bill Sullivan
--------------------------------------------
On Sun, 6/22/14, Sacha <uuccio@gmail.com> wrote:
Subject: RotaxEngines-List: air entering fuel system on suction side - or
is my Pierburg electrical pump broken?
To: rotaxengines-list@matronics.com
Date: Sunday, June 22, 2014, 3:56 AM
--> RotaxEngines-List message
posted by: "Sacha" <uuccio@gmail.com>
Hi Folks,
Yesterday was supposed to be my final fuel flow test before taking to the
air again. I have recently installed a fuel return line in my 912 system
and also a fuel pressure gauge. The a/c is a Kitfox tri-gear, so high-wing
with tanks in each wing and a header tank located behind the seats.----
A further investigation revealed that the fuel that was being pushed out
contained some air bubbles, which to me means that air must be entering the
fuel circuit on the suction side of the electrical pump.
RotaxEngines-List Email Forum -
- MATRONICS WEB FORUMS -
List Contribution Web Site -
-Matt
Dralle, List Admin.
Message 2
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| Subject: | air entering fuel system on suction side - or is |
my Pierburg electrical pump broken?
Sacha- nice find. I have also had trouble with Teflon tape. If you overlap
the end of a fitting, it will tear off and clog a filter. Good luck.
--------------------------------------------
On Tue, 6/24/14, Sacha <uuccio@gmail.com> wrote:
Subject: RE: RotaxEngines-List: air entering fuel system on suction side - or
is my Pierburg electrical pump broken?
To: rotaxengines-list@matronics.com
Date: Tuesday, June 24, 2014, 11:16 AM
--> RotaxEngines-List message
posted by: "Sacha" <uuccio@gmail.com>
Hi Bill,
I took the header tank off today, emptied and cleaned
it. It had some
silicon gasket material left over from when I installed the
fuel level
sender. Occasionally bits would float around and block
the exit orifice and
cause fuel flow to slow down substantially, exactly as you
described. I
expect things will go back to normal as soon as I re-mount
the tank.
Thanks again for the help!
Regards,
Sacha
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com]
On Behalf Of william
sullivan
Sent: Sunday, 22 June, 2014 14:27
To: rotaxengines-list@matronics.com
Subject: Re: RotaxEngines-List: air entering fuel system on
suction side -
or is my Pierburg electrical pump broken?
--> <williamtsullivan@att.net>
Sacha- I can think of a couple of things to check
before blaming the pump.
First, are the tanks vented? Are the vents
functioning? Second, make sure
that there isn't something blocking the fuel intake. I
had this problem
once on a new piece of equipment with a diesel engine.
It would sit and run
at full throttle for hours, but if it went down the street
it would suck
air, and shut the engine down. It drove us nuts for a
while, until we
pulled the fuel tank and found a 1" square piece of masking
tape drifting
around in the fuel. When it sloshed over to the sucker
tube, it blocked it
and shut down the engine. Air in the fuel always makes
me think of that.
We found it by pulling the plug at the bottom and trying to
drain it. The
fuel would stop running. Poke a wire in there, and it
would run again. It
was invisible when soaked with fuel. We had to pull
the tank to get it out.
The tape had been used to cover all openings when shipped
from one factory
to another, and a piece dropped in when the manufacturer
pulled it off.
Bill Sullivan
--------------------------------------------
On Sun, 6/22/14, Sacha <uuccio@gmail.com>
wrote:
Subject: RotaxEngines-List: air entering fuel system on
suction side - or
is my Pierburg electrical pump broken?
To: rotaxengines-list@matronics.com
Date: Sunday, June 22, 2014, 3:56 AM
--> RotaxEngines-List message
posted by: "Sacha" <uuccio@gmail.com>
Hi Folks,
Yesterday was supposed to be my final fuel flow test
before taking to the
air again. I have recently installed a fuel return
line in my 912 system
and also a fuel pressure gauge. The a/c is a Kitfox
tri-gear, so high-wing
with tanks in each wing and a header tank located behind
the seats.----
A further investigation revealed that the fuel that
was being pushed out
contained some air bubbles, which to me means that air
must be entering the
fuel circuit on the suction side of the electrical
pump.
RotaxEngines-List Email Forum -
- MATRONICS WEB FORUMS -
List Contribution Web Site -
-Matt
Dralle, List Admin.
RotaxEngines-List Email Forum -
- MATRONICS WEB FORUMS -
List Contribution Web Site -
-Matt
Dralle, List Admin.
Message 3
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| Subject: | air entering fuel system on suction side - or is |
my Pierburg electrical pump broken?
Silicone seal/products don't get along well with gasoline.
They are not fuel resistant and will cause many fuel related
problems.
john h
mkIII
Rock House, Oregon
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On
Behalf Of Sacha
Sent: Tuesday, June 24, 2014 9:16 AM
Subject: RE: RotaxEngines-List: air entering fuel system on
suction side - or is my Pierburg electrical pump broken?
<uuccio@gmail.com>
Hi Bill,
I took the header tank off today, emptied and cleaned it.
It had some silicon gasket material left over from when I
installed the fuel level sender. Occasionally bits would
float around and block the exit orifice and cause fuel flow
to slow down substantially, exactly as you described. I
expect things will go back to normal as soon as I re-mount
the tank.
Thanks again for the help!
Regards,
Sacha
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On
Behalf Of william sullivan
Sent: Sunday, 22 June, 2014 14:27
Subject: Re: RotaxEngines-List: air entering fuel system on
suction side - or is my Pierburg electrical pump broken?
--> <williamtsullivan@att.net>
Sacha- I can think of a couple of things to check before
blaming the pump.
First, are the tanks vented? Are the vents functioning?
Second, make sure that there isn't something blocking the
fuel intake. I had this problem once on a new piece of
equipment with a diesel engine. It would sit and run at
full throttle for hours, but if it went down the street it
would suck air, and shut the engine down. It drove us nuts
for a while, until we pulled the fuel tank and found a 1"
square piece of masking tape drifting around in the fuel.
When it sloshed over to the sucker tube, it blocked it and
shut down the engine. Air in the fuel always makes me think
of that.
We found it by pulling the plug at the bottom and trying to
drain it. The fuel would stop running. Poke a wire in
there, and it would run again. It was invisible when soaked
with fuel. We had to pull the tank to get it out.
The tape had been used to cover all openings when shipped
from one factory to another, and a piece dropped in when
the manufacturer pulled it off.
Bill
Sullivan
--------------------------------------------
On Sun, 6/22/14, Sacha <uuccio@gmail.com> wrote:
Subject: RotaxEngines-List: air entering fuel system on
suction side - or is my Pierburg electrical pump broken?
To: rotaxengines-list@matronics.com
Date: Sunday, June 22, 2014, 3:56 AM
--> RotaxEngines-List message
posted by: "Sacha" <uuccio@gmail.com>
Hi Folks,
Yesterday was supposed to be my final fuel flow test before
taking to the air again. I have recently installed a fuel
return line in my 912 system and also a fuel pressure
gauge. The a/c is a Kitfox tri-gear, so high-wing with
tanks in each wing and a header tank located behind the
seats.----
A further investigation revealed that the fuel that was
being pushed out contained some air bubbles, which to me
means that air must be entering the fuel circuit on the
suction side of the electrical pump.
RotaxEngines-List Email Forum -
- MATRONICS WEB FORUMS -
List Contribution Web Site -
-Matt
Dralle, List Admin.
=
Photoshare, and much much more:
http://www.matronics.com/Navigator?RotaxEngines-List
=
=
=
Message 4
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| Subject: | Re: air entering fuel system on suction side - or is |
my Pierburg electrical pump broken?
Yes indeed. I should have just mounted the sender with the cork gasket that came
with it.
> On Jun 24, 2014, at 19:02, "John Hauck" <jhauck@elmore.rr.com> wrote:
>
> Silicone seal/products don't get along well with gasoline.
> They are not fuel resistant and will cause many fuel related
> problems.
Message 5
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| Subject: | Magnetic plug torque |
Hello. I have a 14 year old 80 HP 912UL. I had the magnetic plug changed out a
couple of years ago because it had been stripped. I have a question about the
torque. I went to the Rotax class in Sebring over the winter and my notes say
that the torque is 100 inch pounds, max of 140 in pounds. The maintenance manual
that I have says 18.5 foot pounds, which is 222 inch pounds.
Probably my notes are wrong, but I just want to be sure because 222 inch pounds
sounds like a lot. Thanks.
Regards,
Damien
N48TK
Sent from my iPad
Message 6
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| Subject: | Re: Magnetic plug torque |
OK, I just answered my own question. I checked the newest on-line maintenance manual
and the torque for the magnetic plug is 18.5 foot pounds. I should have
checked before bothering the Matronics list. Thanks.
Regards,
Damien
N48TK
Sent from my iPad
> On Jun 24, 2014, at 6:33 PM, Damien Graham <dgraham7@TWCNY.RR.COM> wrote:
>
>
> Hello. I have a 14 year old 80 HP 912UL. I had the magnetic plug changed out
a couple of years ago because it had been stripped. I have a question about the
torque. I went to the Rotax class in Sebring over the winter and my notes say
that the torque is 100 inch pounds, max of 140 in pounds. The maintenance manual
that I have says 18.5 foot pounds, which is 222 inch pounds.
> Probably my notes are wrong, but I just want to be sure because 222 inch pounds
sounds like a lot. Thanks.
> Regards,
> Damien
> N48TK
>
> Sent from my iPad
>
>
>
>
Message 7
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| Subject: | Re: Magnetic plug torque |
Hi Damien,
You are correct. That said I find 18.5 ft/lbs a little too much and makes removal
a little too hard. That is one reason why the old style with the #40 Torx head
stripped out, not ot mention some didn't seat the driver all the way to the
bottom of the plug before they applied pressure to unscrew it. The whole idea
is to tighten the plug so it won't leak or back out. I usually use less torque
and it is secured on top of the torque with safety wire. I have never had one
loosen in all my years. Try a little less torque it will work just fine.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=425413#425413
Message 8
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| Subject: | Re: Cylinder head coolant leak? |
Before you resort to pulling the head why not have it borescoped and look
over the combustion chamber, valves, etc. and see if you can't get a better
handle on the problem that way? Just a thought.
Rick Girard
do not archive
On Mon, Jun 23, 2014 at 12:20 PM, D L Josephson <dlj04@josephson.com> wrote:
> dlj04@josephson.com>
>
> I'm working on a 912ULS from a windstorm-damaged plane that I'm pulling
> out to put in a homebuilt. The engine sat on the airplane for about a year
> after the airframe was totaled. All logs OK, looks very well cared for.
> But, #2 cylinder had about 1/4 cup of coolant in it. Good thing no one
> tried to start the engine, it was hydro locked by that. The spark plugs had
> some rust on the electrodes. I haven't pulled the head off yet but assume
> the valves will be in trouble too. The other cyls look OK.
>
> Is this a commonly seen problem? I have to guess there is some corrosion
> or a crack between the coolant passage and the valve. There's no coolant in
> the oil.
>
> Suggestions?
>
> David Josephson
>
>
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
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