Today's Message Index:
----------------------
1. 07:13 AM - M-14 russian vs. romanian (Bart C)
2. 07:15 AM - M-14 russian vs. romanian (Bart C)
3. 08:30 AM - Engine hesitates when advancing throttle (Eddie Moran)
4. 09:35 AM - Re: Engine hesitates when advancing throttle (BPA)
5. 09:57 AM - Re: Engine hesitates when advancing throttle (A. Dennis Savarese)
6. 11:51 AM - Re: Engine hesitates when advancing throttle (George Coy)
7. 12:54 PM - Re: Engine hesitates when advancing throttle (PeteAbbott@aol.com)
8. 01:00 PM - Re: Engine hesitates when advancing throttle (Steve Culp)
9. 04:18 PM - Re: Engine hesitates when advancing throttle (Eddie Moran)
Message 1
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| Subject: | M-14 russian vs. romanian |
Hi Everyone,
If there someone on the list that is familiar enough
with the differences between Russian and Romanian
manufactured M-14's I'd appreciate it they could
provide a brief outline of those differences. In
reading through various online articles and forum
posts I've picked up that there is something of a bias
against the Russian manufactured engines but I'm not
sure why.
Did either country manufacture the entire engine in
house or did one import from the other?
Do the PF engines follow the same bloodlines as the
different P's or were all of the PF engines made in
one place?
Thanks in advance.
Bart Cocchiola
Message 2
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| Subject: | M-14 russian vs. romanian |
I may have posted this to the wrong address so I'm
sending it again. Sorry if you receive it in
duplicate.
Hi Everyone,
If there someone on the list that is familiar enough
with the differences between Russian and Romanian
manufactured M-14's I'd appreciate it they could
provide a brief outline of those differences. In
reading through various online articles and forum
posts I've picked up that there is something of a bias
against the Russian manufactured engines but I'm not
sure why.
Did either country manufacture the entire engine in
house or did one import from the other?
Do the PF engines follow the same bloodlines as the
different P's or were all of the PF engines made in
one place?
Thanks in advance.
Bart Cocchiola
Message 3
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| Subject: | Engine hesitates when advancing throttle |
Hi,
I have a M14 installed in my Murphy Moose. The engine runs great and I have
flown the aircraft already.
Here is my situation. I have a Vernier throttle cable installed directly to
a fabricated throttle arm. We had determined that the original "arm" was too
short and gave us a very small throw with the direct cable.
While doing the "high speed" taxi tests I noted a strong hesitation while advancing
the throttle. The hesitation or "burp" accured right during the initial
throttle application. It was short but "disturbing". The engine then picked
back up and accelerated rapidly to full power.
I have done the throttle movement just using the "twist the blue knob" on the
Vernier cable and the acceleration is what you would expect by pushing in a "normal"
throttle. It only takes a few twists, say 4 or 5 to get a lot of engine
response.
I have inspected the carb for any loose or missing plugs or any anomalies. There
were none.
The air filter and air box are all OK.
I am thinking that the throttle arm on the carb might be a bit short creating
a "too small" of a throw when the throttle is "pushed in". Does this sound like
a likely fix?
Any other ideas or previous experience with this problem?
Eddie Moran
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Message 4
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| Subject: | Engine hesitates when advancing throttle |
Just a thought, but would it be possible that when advancing the
throttle that the cable my have a little bit of deflection causing the
arm to not move immediately and then suddenly advances?
Allen Barrett
BPE, Inc.
-----Original Message-----
From: owner-m14pengines-list-server@matronics.com
[mailto:owner-m14pengines-list-server@matronics.com] On Behalf Of Eddie
Moran
Sent: Friday, June 22, 2007 9:30 AM
Subject: M14PEngines-List: Engine hesitates when advancing throttle
Hi,
I have a M14 installed in my Murphy Moose. The engine runs great and I
have flown the aircraft already.
Here is my situation. I have a Vernier throttle cable installed
directly to a fabricated throttle arm. We had determined that the
original "arm" was too short and gave us a very small throw with the
direct cable.
While doing the "high speed" taxi tests I noted a strong hesitation
while advancing the throttle. The hesitation or "burp" accured right
during the initial throttle application. It was short but "disturbing".
The engine then picked back up and accelerated rapidly to full power.
I have done the throttle movement just using the "twist the blue knob"
on the Vernier cable and the acceleration is what you would expect by
pushing in a "normal" throttle. It only takes a few twists, say 4 or 5
to get a lot of engine response.
I have inspected the carb for any loose or missing plugs or any
anomalies. There were none.
The air filter and air box are all OK.
I am thinking that the throttle arm on the carb might be a bit short
creating a "too small" of a throw when the throttle is "pushed in".
Does this sound like a likely fix?
Any other ideas or previous experience with this problem?
Eddie Moran
________________________________
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Message 5
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| Subject: | Re: Engine hesitates when advancing throttle |
Eddie,
The problem you've described is quite common on the M14P, particularly
in hot weather. It is related to the acceleration pump and its
associated jet. There is a set of jets that originally was used to
"adjust" the fuel flow when advancing the throttle. But the set of jets
is now extremely difficult to find. A solution we now use is to
literally plug the acceleration pump jet and reinstall it. It will
definitely cure the hesitation problem which of course, get's your
attention when you're on short final and you advance the throttle a
little bit. Some people solder the hole in the jet closed. Others have
fabricated a screw-in plug. I have used JB Weld epoxy and let it cure
overnight. It also works quite well.
Dennis
----- Original Message -----
From: Eddie Moran
To: m14pengines-list@matronics.com
Sent: Friday, June 22, 2007 10:29 AM
Subject: M14PEngines-List: Engine hesitates when advancing throttle
Hi,
I have a M14 installed in my Murphy Moose. The engine runs great and
I have flown the aircraft already.
Here is my situation. I have a Vernier throttle cable installed
directly to a fabricated throttle arm. We had determined that the
original "arm" was too short and gave us a very small throw with the
direct cable.
While doing the "high speed" taxi tests I noted a strong hesitation
while advancing the throttle. The hesitation or "burp" accured right
during the initial throttle application. It was short but "disturbing".
The engine then picked back up and accelerated rapidly to full power.
I have done the throttle movement just using the "twist the blue knob"
on the Vernier cable and the acceleration is what you would expect by
pushing in a "normal" throttle. It only takes a few twists, say 4 or 5
to get a lot of engine response.
I have inspected the carb for any loose or missing plugs or any
anomalies. There were none.
The air filter and air box are all OK.
I am thinking that the throttle arm on the carb might be a bit short
creating a "too small" of a throw when the throttle is "pushed in".
Does this sound like a likely fix?
Any other ideas or previous experience with this problem?
Eddie Moran
-------------------------------------------------------------------------
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Message 6
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| Subject: | Engine hesitates when advancing throttle |
As others have said it is normal. It can be cured by gentle initial
application of the throttle from idle. More important is when you have
closed the throttle in the air to descend. Here you need to "clear the
throttle" every 20 to 30 seconds. and better yet train yourself to recognize
"zero Thrust" feeling and use it on the short final when you need it. I have
always carried a little throttle until well into the round-out and flair.
This is a 621 cu inch engine and with the throttle closed it is a great
dynamic brake.
George
_____
From: owner-m14pengines-list-server@matronics.com
[mailto:owner-m14pengines-list-server@matronics.com] On Behalf Of Eddie
Moran
Sent: Friday, June 22, 2007 11:30 AM
Subject: M14PEngines-List: Engine hesitates when advancing throttle
Hi,
I have a M14 installed in my Murphy Moose. The engine runs great and I have
flown the aircraft already.
Here is my situation. I have a Vernier throttle cable installed directly to
a fabricated throttle arm. We had determined that the original "arm" was
too short and gave us a very small throw with the direct cable.
While doing the "high speed" taxi tests I noted a strong hesitation while
advancing the throttle. The hesitation or "burp" accured right during the
initial throttle application. It was short but "disturbing". The engine
then picked back up and accelerated rapidly to full power.
I have done the throttle movement just using the "twist the blue knob" on
the Vernier cable and the acceleration is what you would expect by pushing
in a "normal" throttle. It only takes a few twists, say 4 or 5 to get a lot
of engine response.
I have inspected the carb for any loose or missing plugs or any anomalies.
There were none.
The air filter and air box are all OK.
I am thinking that the throttle arm on the carb might be a bit short
creating a "too small" of a throw when the throttle is "pushed in". Does
this sound like a likely fix?
Any other ideas or previous experience with this problem?
Eddie Moran
_____
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Message 7
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| Subject: | Re: Engine hesitates when advancing throttle |
A question for Dennis regarding his answer to this question.
Is it a problem with the engine running lean or rich? In the old days, when
I was a hot rodder, we had accelerator pumps, when you gave there full
throttle and the quads opened up the engine would hastate do to running lean.
The
exc pump would inject raw fuel into the intake and prevent this hesitation.
I admit that I have never been inside my Yak 52 carb so I really do not know
how it works. Please enlighten me.
Thanks
Pete
N852GC
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Message 8
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| Subject: | Engine hesitates when advancing throttle |
Our Sukoi was doing that back in 1991. Les Crowder told me to weld the jet up
redrill smaller. Then Ben Morfue studied the manual and said to just weld the
****** up and I have been doing that every since on quite a few M-14Ps and it
has always taken the studder out of them.
The second thing that has been funny over the years is not many people adjust
the carbs and the mixture adjustment on the lower right needs to be adjusted
after the first few hours. Most M-14Ps mixture covers are still factory sealed
with the factory safety wire and tag on the cover.
Pretty easy to adjust. Just have someone in the plane and adjust at low and
intermediate rpms.
Steve Culp
BPA <BPA@bpaengines.com> wrote:
Just a thought, but would it be possible that when advancing the
throttle that the cable my have a little bit of deflection causing the arm to
not move immediately and then suddenly advances?
Allen Barrett
BPE, Inc.
-----Original Message-----
From: owner-m14pengines-list-server@matronics.com [mailto:owner-m14pengines-list-server@matronics.com] On Behalf Of Eddie Moran
Sent: Friday, June 22, 2007 9:30 AM
Subject: M14PEngines-List: Engine hesitates when advancing throttle
Hi,
I have a M14 installed in my Murphy Moose. The engine runs great and I have
flown the aircraft already.
Here is my situation. I have a Vernier throttle cable installed directly to
a fabricated throttle arm. We had determined that the original "arm" was too
short and gave us a very small throw with the direct cable.
While doing the "high speed" taxi tests I noted a strong hesitation while advancing
the throttle. The hesitation or "burp" accured right during the initial
throttle application. It was short but "disturbing". The engine then picked
back up and accelerated rapidly to full power.
I have done the throttle movement just using the "twist the blue knob" on the
Vernier cable and the acceleration is what you would expect by pushing in a
"normal" throttle. It only takes a few twists, say 4 or 5 to get a lot of engine
response.
I have inspected the carb for any loose or missing plugs or any anomalies.
There were none.
The air filter and air box are all OK.
I am thinking that the throttle arm on the carb might be a bit short creating
a "too small" of a throw when the throttle is "pushed in". Does this sound
like a likely fix?
Any other ideas or previous experience with this problem?
Eddie Moran
---------------------------------
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Message 9
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| Subject: | Engine hesitates when advancing throttle |
Well, I have decided. When I get home I am going to weld the little ******.
Thanks to all who helped.
Eddie
Steve Culp <culpspecial@yahoo.com> wrote:
Our Sukoi was doing that back in 1991. Les Crowder told me to weld the jet
up redrill smaller. Then Ben Morfue studied the manual and said to just weld
the ****** up and I have been doing that every since on quite a few M-14Ps and
it has always taken the studder out of them.
The second thing that has been funny over the years is not many people adjust
the carbs and the mixture adjustment on the lower right needs to be adjusted
after the first few hours. Most M-14Ps mixture covers are still factory sealed
with the factory safety wire and tag on the cover.
Pretty easy to adjust. Just have someone in the plane and adjust at low and
intermediate rpms.
Steve Culp
BPA <BPA@bpaengines.com> wrote:
Just a thought, but would it be possible that when advancing the
throttle that the cable my have a little bit of deflection causing the arm to
not move immediately and then suddenly advances?
Allen Barrett
BPE, Inc.
-----Original Message-----
From: owner-m14pengines-list-server@matronics.com [mailto:owner-m14pengines-list-server@matronics.com] On Behalf Of Eddie Moran
Sent: Friday, June 22, 2007 9:30 AM
Subject: M14PEngines-List: Engine hesitates when advancing throttle
Hi,
I have a M14 installed in my Murphy Moose. The engine runs great and I have
flown the aircraft already.
Here is my situation. I have a Vernier throttle cable installed directly to
a fabricated throttle arm. We had determined that the original "arm" was too
short and gave us a very small throw with the direct cable.
While doing the "high speed" taxi tests I noted a strong hesitation while advancing
the throttle. The hesitation or "burp" accured right during the initial
throttle application. It was short but "disturbing". The engine then picked
back up and accelerated rapidly to full power.
I have done the throttle movement just using the "twist the blue knob" on the
Vernier cable and the acceleration is what you would expect by pushing in a
"normal" throttle. It only takes a few twists, say 4 or 5 to get a lot of engine
response.
I have inspected the carb for any loose or missing plugs or any anomalies.
There were none.
The air filter and air box are all OK.
I am thinking that the throttle arm on the carb might be a bit short creating
a "too small" of a throw when the throttle is "pushed in". Does this sound
like a likely fix?
Any other ideas or previous experience with this problem?
Eddie Moran
---------------------------------
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