Today's Message Index:
----------------------
1. 02:43 AM - Re: A friend lost his door (Martin Olliver)
2. 11:04 AM - Re: New engine runs a little rough when weather is cold. (n7188u)
3. 11:30 AM - Re: Re: New engine runs a little rough when weather is cold. (Pete Zut)
4. 01:03 PM - Re: New engine runs a little rough when weather is cold. (n7188u)
5. 03:15 PM - Re: Re: New engine runs a little rough when weather is cold. (James)
6. 03:53 PM - Re: New engine runs a little rough when weather is cold. (n7188u)
7. 04:21 PM - Re: Re: New engine runs a little rough when weather is cold. (James)
8. 06:27 PM - No charge lamp stays on (Martin Tuck)
Message 1
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| Subject: | Re: A friend lost his door |
Hi I am interested in buying your Europa doors and Bugeye wind shield please email
me martflynut@alo.com
thank you
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=510156#510156
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| Subject: | Re: New engine runs a little rough when weather is cold. |
Hi everyone,
I promised an update so here it is.
In a nutshell, I decided to follow my eyes, which were looking at very white rear
cylinder plugs. So I decided to move the needle from position #3 to position
#4 and enrichen the mid-range mixture.
The jury is still out since I only did two flights since the change but the difference
is notable in terms of engine smoothness. But too early for final conclusions.
I did pull the plug and it looks a more reasonable light tan now which
I think is an improvement. I will report back on the mid-range adjustment once
I do a few flights in different conditions.
But what really caught my attention is that for the last three years, even with
changing to a new engine, I had to put up with crappy idling 912Ss (at least
by my picky standard). I always thought that that was the way these engines idle,
particularly the high compression 912S.
Well, I finally decided to play with the idle mixture. I had moved the idle screw
a flat or so in the past to see if anything happened but not much did. But
this time around I decided to move the screw in or out one flat at a time until
something happened. Well, what a pleasant surprise when the engine started to
get smoother as I screwed the needle in but not until you are at less than one
turn from fully closed. And I mean HUGE improvement. All the roughness went
away and now it idles smoothly.
Again, I still have to fly more with these settings but what a difference so far.
I told a Rotax 912S owner friend of mine all this and he recommended I watch this
video. I think it exemplifies my newly acquired conviction that the carbs in
the 912S have to be tuned beyond just the simple balancing.
https://www.youtube.com/watch?v=GxEORpdJp0w
Best,
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=510157#510157
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| Subject: | Re: New engine runs a little rough when weather is cold. |
great vid - thx!
I'm gonna pick me up an O2 sensor/readout and find out where I'm at.
Generally I find my plugs to be a bit rich.
Cheers,
PeteZ
On Mon, Feb 13, 2023 at 2:11 PM n7188u <chmgarb@gmail.com> wrote:
>
> Hi everyone,
>
> I promised an update so here it is.
>
> In a nutshell, I decided to follow my eyes, which were looking at very
> white rear cylinder plugs. So I decided to move the needle from position #3
> to position #4 and enrichen the mid-range mixture.
>
> The jury is still out since I only did two flights since the change but
> the difference is notable in terms of engine smoothness. But too early for
> final conclusions. I did pull the plug and it looks a more reasonable light
> tan now which I think is an improvement. I will report back on the
> mid-range adjustment once I do a few flights in different conditions.
>
> But what really caught my attention is that for the last three years, even
> with changing to a new engine, I had to put up with crappy idling 912Ss (at
> least by my picky standard). I always thought that that was the way these
> engines idle, particularly the high compression 912S.
>
> Well, I finally decided to play with the idle mixture. I had moved the
> idle screw a flat or so in the past to see if anything happened but not
> much did. But this time around I decided to move the screw in or out one
> flat at a time until something happened. Well, what a pleasant surprise
> when the engine started to get smoother as I screwed the needle in but not
> until you are at less than one turn from fully closed. And I mean HUGE
> improvement. All the roughness went away and now it idles smoothly.
>
> Again, I still have to fly more with these settings but what a difference
> so far.
>
> I told a Rotax 912S owner friend of mine all this and he recommended I
> watch this video. I think it exemplifies my newly acquired conviction that
> the carbs in the 912S have to be tuned beyond just the simple balancing.
>
> https://www.youtube.com/watch?v=GxEORpdJp0w
>
> Best,
> Chris
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=510157#510157
>
>
Message 4
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| Subject: | Re: New engine runs a little rough when weather is cold. |
BTW Peter, I did check the gearbox clutch friction and it is fine.
Regarding O2 readings, I think it would be nice to do although not fond of pocking
a hole on my nice CKT muffler. My question though is what is considered OK.
On idle I don't care since I have always leaned my Lycomings to death at idle
to prevent plug fouling. At this low power it is stated that you can't harm
the engine if ultra lean. I didn't over do it just to leave a margin in case weather
gets colder. And I would be careful that the engine will not find itself
too lean if suddenly transitioning from fully closed throttle to open. Don't
know if the Rotax can be sensitive to that. Experiment at your own peril.
At mid or full throttle I would question what air/fuel ratio is desirable? The
guy in the video talks about the mixture being too lean at full power. That surprised
me since I thought Rotax would have a very rich mixture at full power,
particularly at 5000' were the guy flies. Go figure. I'm personally not going
to change the main jet for know. Too risky.
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=510159#510159
Message 5
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| Subject: | Re: New engine runs a little rough when weather is cold. |
Hi Chris,
When you balanced the Carbs, what RPM was the engine running at?
Cheers
James
Sent from Outlook for Android<https://aka.ms/AAb9ysg>
________________________________
From: owner-europa-list-server@matronics.com <owner-europa-list-server@matr
onics.com> on behalf of n7188u <chmgarb@gmail.com>
Sent: Monday, February 13, 2023 7:04:15 PM
Subject: Europa-List: Re: New engine runs a little rough when weather is co
ld.
Hi everyone,
I promised an update so here it is.
In a nutshell, I decided to follow my eyes, which were looking at very whit
e rear cylinder plugs. So I decided to move the needle from position #3 to
position #4 and enrichen the mid-range mixture.
The jury is still out since I only did two flights since the change but the
difference is notable in terms of engine smoothness. But too early for fin
al conclusions. I did pull the plug and it looks a more reasonable light ta
n now which I think is an improvement. I will report back on the mid-range
adjustment once I do a few flights in different conditions.
But what really caught my attention is that for the last three years, even
with changing to a new engine, I had to put up with crappy idling 912Ss (at
least by my picky standard). I always thought that that was the way these
engines idle, particularly the high compression 912S.
Well, I finally decided to play with the idle mixture. I had moved the idle
screw a flat or so in the past to see if anything happened but not much di
d. But this time around I decided to move the screw in or out one flat at a
time until something happened. Well, what a pleasant surprise when the eng
ine started to get smoother as I screwed the needle in but not until you ar
e at less than one turn from fully closed. And I mean HUGE improvement. All
the roughness went away and now it idles smoothly.
Again, I still have to fly more with these settings but what a difference s
o far.
I told a Rotax 912S owner friend of mine all this and he recommended I watc
h this video. I think it exemplifies my newly acquired conviction that the
carbs in the 912S have to be tuned beyond just the simple balancing.
https://www.youtube.com/watch?v=GxEORpdJp0w
Best,
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=510157#510157
Message 6
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| Subject: | Re: New engine runs a little rough when weather is cold. |
Im going to stick to this version of the tread. Why are there two?
Anyway, I do my carb balance at 2500 but also check at 3500. Found that if I make
it perfect at 2500 I get smoother low rpm operation but if at 3500 a little
nicer at cruise. Ive been told to split the difference. Not much difference between
the two though. My electronic balancer is very sensitive.
Unfortunately sync will go out as I get to 1800 and just a little off at 4000.
Sometimes it is better, sometimes worse. But overall runs nice. Better now after
the idle mixture adjustment. Just being picky. I am convinced that if a butterfly
farts in front of the airplane the tuning changes :)
Just came back from a flight. Runs good.
Chris :D
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=510161#510161
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| Subject: | Re: New engine runs a little rough when weather is cold. |
I've a 914 Chris, initially I tuned it at 2500 but found it was rough at id
le & at full power. After reading reports & watching videos by Rotax engine
ers who advised balancing at 3500, I rebalanced my carbs at 3500. The engin
e became very smooth all RPM settings & still is 30 hours later!
Btw
I used a standard Analogue Gauge Balancing Kit.
Regards
James
Sent from Outlook for Android<https://aka.ms/AAb9ysg>
________________________________
From: owner-europa-list-server@matronics.com <owner-europa-list-server@matr
onics.com> on behalf of n7188u <chmgarb@gmail.com>
Sent: Monday, February 13, 2023 11:53:22 PM
Subject: Europa-List: Re: New engine runs a little rough when weather is co
ld.
I=99m going to stick to this version of the tread. Why are there two?
Anyway, I do my carb balance at 2500 but also check at 3500. Found that if
I make it perfect at 2500 I get smoother low rpm operation but if at 3500 a
little nicer at cruise. I=99ve been told to split the difference. No
t much difference between the two though. My electronic balancer is very se
nsitive.
Unfortunately sync will go out as I get to 1800 and just a little off at 40
00. Sometimes it is better, sometimes worse. But overall runs nice. Better
now after the idle mixture adjustment. Just being picky. I am convinced tha
t if a butterfly farts in front of the airplane the tuning changes :)
Just came back from a flight. Runs good.
Chris :D
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=510161#510161
Message 8
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| Subject: | No charge lamp stays on |
Hi Folks,
Started my 912UL today (first time for 2-3 months) and it started first
time! However, I noticed that the 12V 'no-charge' lamp (connected to the
rectifier pins L and C) remained illuminated indicating no charge.
I ran the engine a while to get it up to temp but the lamp stayed on and
after shut down my battery voltage had dropped below 11.5V. so it is
definitely is not being charged.
I'm sure it could be a number of things from a dodgy rectifier to issues
with the alternator.
Any pointers as to what to look first at would be appreciated.
Regards,
Martin Tuck
Europa N152MT
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