---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Mon 02/13/23: 8 ---------------------------------------------------------- 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 _____________________________________ Time: 02:43:56 AM PST US Subject: Europa-List: Re: A friend lost his door From: "Martin Olliver" 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 ________________________________ Message 2 _____________________________________ Time: 11:04:41 AM PST US Subject: Europa-List: Re: New engine runs a little rough when weather is cold. From: "n7188u" 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 3 _____________________________________ Time: 11:30:32 AM PST US From: Pete Zut Subject: Re: Europa-List: 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 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 _____________________________________ Time: 01:03:48 PM PST US Subject: Europa-List: Re: New engine runs a little rough when weather is cold. From: "n7188u" 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 _____________________________________ Time: 03:15:41 PM PST US From: James Subject: Re: Europa-List: 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 ________________________________ From: owner-europa-list-server@matronics.com on behalf of n7188u 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 _____________________________________ Time: 03:53:44 PM PST US Subject: Europa-List: Re: New engine runs a little rough when weather is cold. From: "n7188u" 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 ________________________________ Message 7 _____________________________________ Time: 04:21:24 PM PST US From: James Subject: Re: Europa-List: 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 ________________________________ From: owner-europa-list-server@matronics.com on behalf of n7188u 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 _____________________________________ Time: 06:27:23 PM PST US From: Martin Tuck Subject: Europa-List: 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/europa-list Browse Digests http://www.matronics.com/digest/europa-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.