Today's Message Index:
----------------------
1. 04:48 AM - Re: Free Wheeling Prop (Catz631@aol.com)
2. 06:01 AM - Re: RotaxEngines-List Digest: 5 Msgs - 10/26/08 (Wes Whitley)
3. 12:55 PM - Rough starting 912uls (rickwehrmann)
4. 02:22 PM - Re: Rough starting 912uls (Pete Christensen)
5. 02:23 PM - Re: Rough starting 912uls (Robert C Harrison)
6. 02:55 PM - Re: Free Wheeling Prop (Thilo Kind)
Message 1
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| Subject: | Re: Free Wheeling Prop |
Les,
I believe we were refering to always turning the prop thru by hand in order
to check the oil quantity and to get the oil out of the case and into the oil
tank prior to engine start. You could readily tell if you had normal
compression or a hydraulic lock.
As you say ,you should NEVER hand prop the engine to start it.Although in
my Rotax engine class the instructor Dean mentioned that he knew of two cases
where it was done and it was successful. Both guys that did it said they would
NEVER do it again! (a good way to loose life or limb)
Dick Maddux
Kitfox 4-1200
912UL
Pensacola,Fl
**************A Good Credit Score is 700 or Above. See yours in just 2 easy
steps!
ooter)
Message 2
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| Subject: | Re: RotaxEngines-List Digest: 5 Msgs - 10/26/08 |
Dale,
A couple users on the Wings Forum have had this (no compression) problem.
See http://www.wingsforum.com/viewtopic.php?t=14826 as a start, then search
on 'compression'.
Seems to be related to sticking valves/contaminated fuel/oil.
Wes Whitley
912ULS/ Just Highlander #095
Message 3
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| Subject: | Rough starting 912uls |
Hello,
I recently purchased an Interplane Skyboy with a 912ULS. The engine often, not
always, exhibits an extreme high frequency vibration on start-up. I cannot get
the revs up much above 2000 during one of these attacks, and the best technique
I have discovered to smooth out the engine is to get the revs up as high as
possible (again, about 2000), and then chop the throttle, and quickly open just
a crack. If the engine catches, it is smooth as glass. If not, I repeat until
it does smooth out.
I have had my mechanic do the pneumatic carb sync, and generally go through the
motor. All cylinders are 78 pounds, plugs look good, etc.
It feels almost like a 2-stroke engine that is '4-stroking'. All four cylinders
seem to be firing during one of these episodes, as all the exhaust pipes are
hot. I have had this happen on a dead cold start, and a restart after only sitting
for 10 minutes.
Does this sound familiar to anyone?
Thanks in advance,
Rick
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=210571#210571
Message 4
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| Subject: | Re: Rough starting 912uls |
My 912 does the same thing but I smooth it out with choke. About a minute
it will hold an idle.
Pete
Kitfox III
Hell Paso, TX
----- Original Message -----
From: "rickwehrmann" <rick.wehrmann@autopkg.com>
Sent: Monday, October 27, 2008 1:54 PM
Subject: RotaxEngines-List: Rough starting 912uls
> <rick.wehrmann@autopkg.com>
>
> Hello,
> I recently purchased an Interplane Skyboy with a 912ULS. The engine often,
> not always, exhibits an extreme high frequency vibration on start-up. I
> cannot get the revs up much above 2000 during one of these attacks, and
> the best technique I have discovered to smooth out the engine is to get
> the revs up as high as possible (again, about 2000), and then chop the
> throttle, and quickly open just a crack. If the engine catches, it is
> smooth as glass. If not, I repeat until it does smooth out.
> I have had my mechanic do the pneumatic carb sync, and generally go
> through the motor. All cylinders are 78 pounds, plugs look good, etc.
> It feels almost like a 2-stroke engine that is '4-stroking'. All four
> cylinders seem to be firing during one of these episodes, as all the
> exhaust pipes are hot. I have had this happen on a dead cold start, and a
> restart after only sitting for 10 minutes.
> Does this sound familiar to anyone?
> Thanks in advance,
> Rick
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=210571#210571
>
>
>
Message 5
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| Subject: | Rough starting 912uls |
Hi! Rick
It sounds to me to be the slipper clutch that needs adjustment. Unless
you can say you don't have one I'd have a check done on it!
Sounds balmy but I believe it is quite likely>
Regards
Bob Harrison G-PTAG Rotax 914.
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of
rickwehrmann
Sent: 27 October 2008 19:55
Subject: RotaxEngines-List: Rough starting 912uls
<rick.wehrmann@autopkg.com>
Hello,
I recently purchased an Interplane Skyboy with a 912ULS. The engine
often, not always, exhibits an extreme high frequency vibration on
start-up. I cannot get the revs up much above 2000 during one of these
attacks, and the best technique I have discovered to smooth out the
engine is to get the revs up as high as possible (again, about 2000),
and then chop the throttle, and quickly open just a crack. If the engine
catches, it is smooth as glass. If not, I repeat until it does smooth
out.
I have had my mechanic do the pneumatic carb sync, and generally go
through the motor. All cylinders are 78 pounds, plugs look good, etc.
It feels almost like a 2-stroke engine that is '4-stroking'. All four
cylinders seem to be firing during one of these episodes, as all the
exhaust pipes are hot. I have had this happen on a dead cold start, and
a restart after only sitting for 10 minutes.
Does this sound familiar to anyone?
Thanks in advance,
Rick
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=210571#210571
Message 6
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| Subject: | Free Wheeling Prop |
Hi everybody,
I have a hard time believing, that you can start a 912 by end - you will
need at least 300 RPM for the ignition to fire the plugs - that's a bit too
much for hand propping.
Thilo Kind
Zodiac CH 601 HDS with Rotax 912
_____
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of
Catz631@aol.com
Sent: Monday, October 27, 2008 12:48
Subject: Re: RotaxEngines-List: Free Wheeling Prop
Les,
I believe we were refering to always turning the prop thru by hand in
order to check the oil quantity and to get the oil out of the case and into
the oil tank prior to engine start. You could readily tell if you had normal
compression or a hydraulic lock.
As you say ,you should NEVER hand prop the engine to start it.Although in
my Rotax engine class the instructor Dean mentioned that he knew of two
cases where it was done and it was successful. Both guys that did it said
they would NEVER do it again! (a good way to loose life or limb)
Dick Maddux
Kitfox 4-1200
912UL
Pensacola,Fl
_____
A Good Credit Score is 700 or Above. See
p://www.freecreditreport.com/pm/default.aspx?sc=668072&hmpgID=82&bcd=emailfo
oter> yours in just 2 easy steps!
18:08
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