---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sun 05/10/09: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:58 AM - Re: 912 One cylinder running rich () 2. 11:48 AM - Re: AN Banjo fittings (rparigor@suffolk.lib.ny.us) 3. 01:16 PM - Re: Re: 912 One cylinder running rich (Pete Christensen) 4. 04:49 PM - Re: Re: 912 One cylinder running rich (Noel) 5. 07:38 PM - Re: 912 One cylinder running rich (Roger Lee) ________________________________ Message 1 _____________________________________ Time: 02:58:15 AM PST US From: Subject: Re: RotaxEngines-List: 912 One cylinder running rich Before you thump the allen bolt with a impact tool, Use some localised heat to its head, Give it time to heat soak the loctite, then it should remove easily, Dont forget to reapply loctite for fitting, regards Ivor ---- peteohms wrote: > > I just replaced the plugs on my 912 and the two plugs on the left front cylinder were black. The rest were normal. (+/-436 hours on the engine) I tried to remove the valve cover but the wrench just bent. Two questions: > 1) What would cause the one cylinder to run rich? > 2) How should I go about getting the bolt loose on the valve cover without stripping the allen head or breaking the allen wrench? > > -------- > Pete > Hell Paso, TX > Kitfox III, 912ul, Grove > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=243313#243313 > > > > > > > > > > ________________________________ Message 2 _____________________________________ Time: 11:48:47 AM PST US Subject: Re: RotaxEngines-List: AN Banjo fittings From: rparigor@suffolk.lib.ny.us Hi Paul Sorry don't know cost. If you have a part number can call other than Lockwood. Ron P. > Hi Ron. > > Any idea what the AN Banjo and AN Oil pump adapter cost ? > > Paul > > ___________________________________________________ > Perhaps this will help. > > Ron > Parigoris > > > > Dear ROAN subscriber, > Rotax has released Revised Service Instructions listed below. > Within these Service Documents, changes and additions introduced with > these > revisions are indicated by double vertical > bars on the left hand page margins. > SI-912-003-R2 / 914-005-R2 > Oil line connections with UNF-threads (AN-8) for Rotax Engine Type 912 and > 914 (Series) > > > ________________________________ Message 3 _____________________________________ Time: 01:16:07 PM PST US From: "Pete Christensen" Subject: Re: RotaxEngines-List: Re: 912 One cylinder running rich Thank you Bill and Roger. The 2 plugs were the only 2 with carbon. All the others were fine. I thought maybe a valve was sticking or something. The A and P who did my owner assisted annual thought so too. He has a rotax in his Kitfox but is a relatively new owner like me. I had to fly about 90 miles to get my annual done so I thought the plugs should all be the same. Mag check shows no difference, if that makes any difference. Pete ----- Original Message ----- From: "Roger Lee" Sent: Saturday, May 09, 2009 9:00 PM Subject: RotaxEngines-List: Re: 912 One cylinder running rich > > Hi Pete, > > Bill is right about a few taps. Have someone put a little pressure on the > screw and while he is trying to turn it just tap it with something like a > brass or aluminum rod a time or two right on the edge of the screw. It > will come loose. > The different lengths in the intake manifolds combined with idle rpms can > cause the black sooty plugs at times. It is very common and goes away when > you are at higher rpms like cruise. I wouldn't lose any sleep over it. > I wouldn't take the valve cover off unless there is a real need. It is an > "O" ring seal and sometimes won't seal tight again and will ooze oil. Then > you need to replace the "O" ring. A set of 4 valve cover "O" rings may not > be quite as cheap as you might think. $28 each plus $5 for the small "O" > ring for the screw itself. > > -------- > Roger Lee > Tucson, Az. > Light Sport Repairman - Maintenance Rated > Rotax Service Center > 520-574-1080 > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=243356#243356 > > > ________________________________ Message 4 _____________________________________ Time: 04:49:03 PM PST US From: "Noel" Subject: RE: RotaxEngines-List: Re: 912 One cylinder running rich If you are really worried about it try a differential compression test. Noel -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Pete Christensen Sent: 10 May 2009 05:44 PM Subject: Re: RotaxEngines-List: Re: 912 One cylinder running rich Thank you Bill and Roger. The 2 plugs were the only 2 with carbon. All the others were fine. I thought maybe a valve was sticking or something. The A and P who did my owner assisted annual thought so too. He has a rotax in his Kitfox but is a relatively new owner like me. I had to fly about 90 miles to get my annual done so I thought the plugs should all be the same. Mag check shows no difference, if that makes any difference. Pete ----- Original Message ----- From: "Roger Lee" Sent: Saturday, May 09, 2009 9:00 PM Subject: RotaxEngines-List: Re: 912 One cylinder running rich > > Hi Pete, > > Bill is right about a few taps. Have someone put a little pressure on the > screw and while he is trying to turn it just tap it with something like a > brass or aluminum rod a time or two right on the edge of the screw. It > will come loose. > The different lengths in the intake manifolds combined with idle rpms can > cause the black sooty plugs at times. It is very common and goes away when > you are at higher rpms like cruise. I wouldn't lose any sleep over it. > I wouldn't take the valve cover off unless there is a real need. It is an > "O" ring seal and sometimes won't seal tight again and will ooze oil. Then > you need to replace the "O" ring. A set of 4 valve cover "O" rings may not > be quite as cheap as you might think. $28 each plus $5 for the small "O" > ring for the screw itself. > > -------- > Roger Lee > Tucson, Az. > Light Sport Repairman - Maintenance Rated > Rotax Service Center > 520-574-1080 > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=243356#243356 > > > ________________________________ Message 5 _____________________________________ Time: 07:38:51 PM PST US Subject: RotaxEngines-List: Re: 912 One cylinder running rich From: "Roger Lee" I work on lots of Rotax 912's and most have it at some time. Sometimes they don't and sometimes they do. It just depends on the circumstances within the last few to several minutes before you shut it down, but I see it all the time. It's nothing to worry about because it is not like that at higher rpms or even at idle all the time. -------- Roger Lee Tucson, Az. 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