Today's Message Index:
----------------------
1. 05:18 AM - Re: Embarassing Confession -- I Can't Start My Engine (Gary Casey)
2. 10:07 AM - Re: LycomingEngines-List Digest: 2 Msgs - 05/30/08 (r falstad)
3. 06:28 PM - Forced landing (Rv7flyer)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Embarassing Confession -- I Can't Start My Engine |
Bob,
To your question about how to tell if it is rich or lean, I've found
the best way is to have someone watch from the outside. If it is
difficult to start, but when it does there is no puff of black smoke
it was probably too lean. If there is a lot of smoke and the engine
runs on less than all cylinders for a bit after it starts then it was
too rich. Otherwise, it is often really hard to tell.
I have a suspicion it is time to start pulling plugs. Your engine is
new, probably burning some oil, and you have been deliberately
running rich, so the plugs might be fouled to the point that starting
is difficult. One thing I have found that helped in that condition
is to before you shut it off run the engine at a fairly fast idle -
as high as the noise level will let you get away with - even up to
the runup rpm or beyond if you want. Lean the mixture as far as
possible while keeping it running halfway smooth, at least until you
get a real rpm loss. Run it that way for 5 seconds or more and then
pull the mixture to shut it off from that condition. Don't go back
to idle before shutting it off. You can pull the throttle back to
idle as it is spinning down to make it shake as little as possible as
it stops, but that doesn't have very much effect. Idea is to burn
off the loose carbon and get the plugs cleaned a little for the next
start. After the engine stops burning so much oil and you are able
to run lean more of the time the problem should go away, if that was
the problem in the first place. Good luck.
Gary Casey
>
> Folks,
>
> I have about ten hours of my Phase I flying on a GlaStar with an
> O-360-A1A. The engine has new rings and exhaust valves so I've been
> running it hard and full rich. The engine has become increasingly
> difficult to start and I want to make sure it isn't my technique
> before
> I start pulling plugs, etc. I haven't flown in the ten years it
> took me
> to build the airplane and my total time in that time (not including
> the
> ten hours in the GlaStar) has been about 14 hours of recent recurrency
> training in other people's airplanes.
>
> I've used the normal start (full rich and throttle cracked about
> 1/4"
> inch) but it doesn't want to fire. I've also used (sparingly) primer
> for a couple of seconds (my primer is electric to cylinders 3 &
> 4). The
> problem is worse when the engine is hot (and it's already hot outside
> here in central Texas -- 85 to 95 degrees).
>
> I've also used the flooded engine start (mixture at idle cut-off and
> throttle full forward) when the engine wouldn't start with the normal
> technique. At least this was the technique I used years ago in an
> injected Mooney for hot starts.
>
> How can I tell if it's not getting enough fuel, too much fuel, or if
> my plugs have fouled because of a too rich mixture? I have been
> leaning
> the engine when taxiing.
>
> Best regards,
>
> Bob
>
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: LycomingEngines-List Digest: 2 Msgs - 05/30/08 |
It has a carb.
----- Original Message -----
From: LycomingEngines-List Digest
Server<mailto:lycomingengines-list@matronics.com>
To: LycomingEngines-List Digest
List<mailto:lycomingengines-list-digest@matronics.com>
Sent: Saturday, May 31, 2008 1:56 AM
Subject: LycomingEngines-List Digest: 2 Msgs - 05/30/08
*
Online Versions of Today's List Digest Archive
Today's complete LycomingEngines-List Digest can also be found in
either of the
two Web Links listed below. The .html file includes the Digest
formatted
in HTML for viewing with a web browser and features Hyperlinked
Indexes
and Message Navigation. The .txt file includes the plain ASCII
version
of the LycomingEngines-List Digest and can be viewed with a generic
text editor
such as Notepad or with a web browser.
HTML Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=html&
Chapter 08-05-30&Archive=LycomingEngines<http://www.matronics.com/d
igest/digestview.php?Style=82701&View=html&Chapter 08-05-30&Archi
ve=LycomingEngines>
Text Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&C
hapter 08-05-30&Archive=LycomingEngines<http://www.matronics.com/di
gest/digestview.php?Style=82701&View=txt&Chapter 08-05-30&Archive
=LycomingEngines>
======================
EMail Version of Today's List Digest Archive
======================
----------------------------------------------------------
LycomingEngines-List Digest Archive
---
Total Messages Posted Fri 05/30/08: 2
----------------------------------------------------------
Today's Message Index:
----------------------
1. 01:15 AM - Re: Embarassing Confession -- I Can't Start My
Engine (Grant Piper)
2. 04:57 AM - Re: Embarassing Confession -- I Can't Start My
Engine (Dale Ensing)
________________________________ Message 1
_____________________________________
Time: 01:15:21 AM PST US
From: "Grant Piper"
<grant.piper@bigpond.com<mailto:grant.piper@bigpond.com>>
Subject: Re: LycomingEngines-List: Embarassing Confession -- I Can't
Start My Engine
I have the same engine and primer system in my RV-4. I prime for
about
3 bananas when cold (below 15=B0C) and open the throttle about 1/4"
or
so, then crank. My carb has the Mooney mod to enrichen it over the
original jet (can't recall mod number, but it is too rich at low
altitude now, i aggressively lean on the ground). If it is a warm
day,
I'll just pump the throttle once, set 1/4", then crank. If the
engine
is warm I'll open the throttle wider initially, ~1/2", and
progressively
open it as I crank until it fires, then quickly back to idle. If
this
doesn't work, I'll re-prime, but less than for a cold start. I always
start on the left maggie only, then switch on the right mag as soon as
it fires (I have individual toggle switches). If this doesn't work
for
you, I'd check the magneto switch wiring. I stuffed mine up
iniitially
and was trying to start on the RH mag only (non-impulse), and had
obvious trouble! (amazed that I managed to start it as often as I
did!).
good luck
Grant
----- Original Message -----
From: r falstad
To: LycomingEngines-List Digest Server
Sent: Friday, May 30, 2008 12:43 PM
Subject: LycomingEngines-List: Embarassing Confession -- I Can't
Start
My Engine
Folks,
I have about ten hours of my Phase I flying on a GlaStar with an
O-360-A1A. The engine has new rings and exhaust valves so I've been
running it hard and full rich. The engine has become increasingly
difficult to start and I want to make sure it isn't my technique
before
I start pulling plugs, etc. I haven't flown in the ten years it took
me
to build the airplane and my total time in that time (not including
the
ten hours in the GlaStar) has been about 14 hours of recent recurrency
training in other people's airplanes.
I've used the normal start (full rich and throttle cracked about
1/4"
inch) but it doesn't want to fire. I've also used (sparingly) primer
for a couple of seconds (my primer is electric to cylinders 3 & 4).
The
problem is worse when the engine is hot (and it's already hot outside
here in central Texas -- 85 to 95 degrees).
I've also used the flooded engine start (mixture at idle cut-off and
throttle full forward) when the engine wouldn't start with the normal
technique. At least this was the technique I used years ago in an
injected Mooney for hot starts.
How can I tell if it's not getting enough fuel, too much fuel, or if
my plugs have fouled because of a too rich mixture? I have been
leaning
the engine when taxiing.
Best regards,
Bob
________________________________ Message 2
_____________________________________
Time: 04:57:50 AM PST US
From: "Dale Ensing"
<densing@carolina.rr.com<mailto:densing@carolina.rr.com>>
Subject: Re: LycomingEngines-List: Embarassing Confession -- I Can't
Start My Engine
Is it carbureted or injected?
----- Original Message -----
From: r falstad
To: LycomingEngines-List Digest Server
Sent: Thursday, May 29, 2008 10:43 PM
Subject: LycomingEngines-List: Embarassing Confession -- I Can't
Start My
Engine
Folks,
I have about ten hours of my Phase I flying on a GlaStar with an
O-360-A1
A. The engine has new rings and exhaust valves so I've been running
it har
d and full rich. The engine has become increasingly difficult to
start and
I want to make sure it isn't my technique before I start pulling
plugs, et
c. I haven't flown in the ten years it took me to build the airplane
and m
y total time in that time (not including the ten hours in the GlaStar)
has
been about 14 hours of recent recurrency training in other people's
airplan
es.
I've used the normal start (full rich and throttle cracked about
1/4" inc
h) but it doesn't want to fire. I've also used (sparingly) primer for
a co
uple of seconds (my primer is electric to cylinders 3 & 4). The
problem is
worse when the engine is hot (and it's already hot outside here in
central
Texas -- 85 to 95 degrees).
I've also used the flooded engine start (mixture at idle cut-off and
thro
ttle full forward) when the engine wouldn't start with the normal
technique
. At least this was the technique I used years ago in an injected
Mooney f
or hot starts.
How can I tell if it's not getting enough fuel, too much fuel, or if
my p
lugs have fouled because of a too rich mixture? I have been leaning
the en
gine when taxiing.
Best regards,
Bob
http://www.matronics.com/Navigator?LycomingEngines-List<http://www.matron
ics.com/Navigator?LycomingEngines-List>
http://www.matronics.com/contribution<http://www.matronics.com/contributi
on>
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Today my 0-360 started running rough. Backfiring while at cruse. I landed to
check things out. Upon restarting my engine was flooded and I had a heck of a
time getting it going. Once started and cleaned out I proceeded to do a run
up and noticed that I could not produce full power until i pulled the mixture
back 2/3 of the way. I could not get it to idle with the mixture in all the way.
The only way to get it started now is to have the mixture half way out and
then lean it 2/3 of the way just to keep it running. I can produce full power
at that setting.
Another note I noticed that the fuel pressure continue to rise even after shutting
down the engine and fuel pump. This could be from high heat in the engine
compartment.
I have checked the linkages and proper operation of the mixture control system.
OK
Carb is a MA4-5 with the f mod for the RV7A.
Could i possibly be looking at a stuck needle/float valve?
After it cooled a bit everything ran better. Did not have to lean as much.
Any Ideas?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=185676#185676
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|