 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
JohnBanes(at)adelphia.net
Guest
|
 Posted: Sun Aug 06, 2006 9:52 am Post subject: 912ULS - Oil in Exhaust |
 |
|
The engine had not been operated for 5 weeks. Temperatures in the hangar during this period were in excess of 100 deg F. It was hand propped, several revolutions, until the oil level in the external reservoir was more than half way up the dipstick. Since the battery was low the initial start was attempted with the choke full on. The engine went through a couple of revolutions and stopped when it tried to fire. The next attempt ended with a single backfire after two of three revolutions. So the choke was closed and the starter was engaged and the engine rotated several times, just enough for the oil pressure to register 70psig, but it did not start. The started was disengaged. Then the starter was engaged with the choke on and the engine fired and ran smoothly at 2000 RPM. There was just a trace of smoke. It did not seem to persist so it was attributed to excess fuel from the previous attempts to start the engine. The engine idled and responded to throttle inputs normally and taxiing was begun. Two to three minutes later there was a large amount of smoke coming out of the exhaust and oil started to collect on the left landing gear and lift strut. The engine was operated for another couple of minutes during the return to the hangar. Most of the mosquitoes had left the area by this time. After a total of 5 minutes of operation the smoke stopped. The inspection after shutdown revealed the oil level in the tank to be at the full mark and the interior of the exhaust pipe was coated with oil. Subsequently the engine has been operated for more than two hours with no trace of smoke or oil.
Does anyone know of a similar experience?
Thanks in advance!
John Banes
S6 912S 225TT Pennzoil Motorcycle Oil 10W40
| | - The Matronics Kitfox-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?Kitfox-List |
|
|
|
| Back to top |
|
 |
dafox(at)ckt.net
Guest
|
| Posted: Sun Aug 06, 2006 6:40 pm Post subject: 912ULS - Oil in Exhaust |
|
|
John, I had experienced the0 same thing at two different times from long periods of the engine not0 running.
however0 there was no backfiring after it was started. I would say your backfiring was0 caused from a
low battery and a flooded engine.
I wouldn't0 worry about it. I've flown my kitfox 40 hours sense0 then, and I just got back0 from Oshkosh
flying another 12 hours, and the 912 UL purred like0 a kitten all the way.
0 0 0 0 David0 Yeamans
0 0 0 0 Kitfox IV 1200 0 912 ULS
0
[quote] ---
| | - The Matronics Kitfox-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?Kitfox-List |
|
|
|
| Back to top |
|
|
smokey_bear_40220(at)yaho
Guest
|
| Posted: Mon Aug 07, 2006 3:54 pm Post subject: 912ULS - Oil in Exhaust |
|
|
John,
Sounds like a good time for a compression check....
Stuck ring? Valve guide?
Some might give it a good hard run and see if this
brings it back to normal. Just sitting is hard on
planes.
Kurt S.
--- John Banes <JohnBanes(at)Adelphia.net> wrote:
| Quote: | The engine had not been operated for 5 weeks.
Temperatures in the hangar
during this period were in excess of 100 deg F. It
was hand propped,
several revolutions, until the oil level in the
external reservoir was more
than half way up the dipstick. Since the battery
was low the initial start
was attempted with the choke full on. The engine
went through a couple of
revolutions and stopped when it tried to fire. The
next attempt ended with
a single backfire after two of three revolutions.
So the choke was closed
and the starter was engaged and the engine rotated
several times, just
enough for the oil pressure to register 70psig, but
it did not start. The
started was disengaged. Then the starter was
engaged with the choke on and
the engine fired and ran smoothly at 2000 RPM.
There was just a trace of
smoke. It did not seem to persist so it was
attributed to excess fuel from
the previous attempts to start the engine. The
engine idled and responded
to throttle inputs normally and taxiing was begun.
Two to three minutes
later there was a large amount of smoke coming out
of the exhaust and oil
started to collect on the left landing gear and lift
strut. The engine was
operated for another couple of minutes during the
return to the hangar.
Most of the mosquitoes had left the area by this
time. After a total of 5
minutes of operation the smoke stopped. The
inspection after shutdown
revealed the oil level in the tank to be at the full
mark and the interior
of the exhaust pipe was coated with oil.
Subsequently the engine has been
operated for more than two hours with no trace of
smoke or oil.
Does anyone know of a similar experience?
Thanks in advance!
John Banes
S6 912S 225TT Pennzoil Motorcycle Oil 10W40
|
__________________________________________________
| | - The Matronics Kitfox-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?Kitfox-List |
|
|
|
| Back to top |
|
|
Jim Shumaker
Joined: 09 Jan 2006
Posts: 106
|
| Posted: Mon Aug 07, 2006 4:26 pm Post subject: 912ULS - Oil in Exhaust |
|
|
John
The oil reservoir in the kitfox is above the engine. The oil siphons into the crankcase while sitting. Some oil also leaks past the rings and into the cylinder. Pulling the prop through by hand before starting prevented hydraulic lock but some oil made it to the exhaust manifold where it sputtered out the exhaust during start up. The oil turned to smoke as the engine warmed up. No smoke after that is a good sign. As Kurt said, a compression check is in order.
Jim Shumaker
[quote] The engine had not been operated for 5 weeks.
Temperatures in the hangar
during this period were in excess of 100 deg F. It
was hand propped,
several revolutions, until the oil level in the
external reservoir was more
than half way up the dipstick. Since the battery
was low the initial start
was attempted with the choke full on. The engine
went through a couple of
revolutions and stopped when it tried to fire. The
next attempt ended with
a single backfire after two of three revolutions.
So the choke was closed
and the starter was engaged and the engine rotated
several times, just
enough for the oil pressure to register 70psig, but
it did not start. The
started was disengaged. Then the starter was
engaged with the choke on and
the engine fired and ran smoothly at 2000 RPM.
There was just a trace of
smoke. It did not seem to persist so it was
attributed to excess fuel from
the previous attempts to start the engine. The
engine idled and responded
to throttle inputs normally and taxiing was begun.
Two to three minutes
later there was a large amount of smoke coming out
of the exhaust and oil
started to collect on the left landing gear and lift
strut. The engine was
operated for another couple of minutes during the
return to the hangar.
Most of the mosquitoes had left the area by this
time. After a total of 5
minutes of operation the smoke stopped. The
inspection after shutdown
revealed the oil level in the tank to be at the full
mark and the interior
of the exhaust pipe was coated with oil.
| | - The Matronics Kitfox-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?Kitfox-List |
|
_________________
Jim Shumaker |
|
| Back to top |
|
|
JohnBanes(at)adelphia.net
Guest
|
| Posted: Mon Aug 14, 2006 6:57 pm Post subject: 912ULS - Oil in Exhaust |
|
|
Thanks Jim, Kurt and David!
John
Do not archive
From: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of James Shumaker
Sent: Monday, August 07, 2006 7:26 PM
To: kitfox-list(at)matronics.com
Subject: Re: 912ULS - Oil in Exhaust
John
The oil reservoir in the kitfox is above the engine. The oil siphons into the crankcase while sitting. Some oil also leaks past the rings and into the cylinder. Pulling the prop through by hand before starting prevented hydraulic lock but some oil made it to the exhaust manifold where it sputtered out the exhaust during start up. The oil turned to smoke as the engine warmed up. No smoke after that is a good sign. As Kurt said, a compression check is in order.
Jim Shumaker
> The engine had not been operated for 5 weeks.
> Temperatures in the hangar
> during this period were in excess of 100 deg F. It
> was hand propped,
> several revolutions, until the oil level in the
> external reservoir was more
> than half way up the dipstick. Since the battery
> was low the initial start
> was attempted with the choke full on. The engine
> went through a couple of
> revolutions and stopped when it tried to fire. The
> next attempt ended with
> a single backfire after two of three revolutions.
> So the choke was closed
> and the starter was engaged and the engine rotated
> several times, just
> enough for the oil pressure to register 70psig, but
> it did not start. The
> started was disengaged. Then the starter was
> engaged with the choke on and
> the engine fired and ran smoothly at 2000 RPM.
> There was just a trace of
> smoke. It did not seem to persist so it was
> attributed to excess fuel from
> the previous attempts to start the engine. The
> engine idled and responded
> to throttle inputs normally and taxiing was begun.
> Two to three minutes
> later there was a large amount of smoke coming out
> of the exhaust and oil
> started to collect on the left landing gear and lift
> strut. The engine was
> operated for another couple of minutes during the
> return to the hangar.
> Most of the mosquitoes had left the area by this
> time. After a total of 5
> minutes of operation the smoke stopped. The
> inspection after shutdown
> revealed the oil level in the tank to be at the full
> mark and the interior
> of the exhaust pipe was coated with oil.
>
[quote][b]
| | - The Matronics Kitfox-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?Kitfox-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
