---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Fri 09/03/10: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:10 PM - Carb rebuild - Xtra credit question (Roger Lee) 2. 01:16 PM - Rotax 912 gearbox pictures (Roger Lee) 3. 02:44 PM - Re: Rotax 912 gearbox pictures (Richard Girard) 4. 03:28 PM - Re: Rotax 912 gearbox pictures (Roger Lee) 5. 03:34 PM - Water in the fuel question (Roger Lee) 6. 06:21 PM - Re: Water in the fuel question (Richard Girard) 7. 07:24 PM - Re: Water in the fuel question (Roger Lee) ________________________________ Message 1 _____________________________________ Time: 01:10:57 PM PST US Subject: RotaxEngines-List: Carb rebuild - Xtra credit question From: "Roger Lee" Hi Guys, I think this might light another fire, but here goes. Lucien, As a retired fireman I have thick skin, extra water and hose to extinguish those fires. (Thick skin mostly) LOL Is there a difference between the 200 hr carb inspection and a rebuild? If so who can do the work, i.e. what Rotax rating is required to do one or either? Note*** If your are experimental I know you are not required to follow the Rotax regs. but SLSA do and I would recommend from what I have seen come across my bench that you find someone with training. It can save you money down the line. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=311282#311282 ________________________________ Message 2 _____________________________________ Time: 01:16:15 PM PST US Subject: RotaxEngines-List: Rotax 912 gearbox pictures From: "Roger Lee" Hi Guys, I don't remember if I posted these pictures? If I did disregard. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=311283#311283 Attachments: http://forums.matronics.com//files/binder3_621.pdf ________________________________ Message 3 _____________________________________ Time: 02:44:52 PM PST US Subject: Re: RotaxEngines-List: Rotax 912 gearbox pictures From: Richard Girard Okay, Roger, I'll bite. I don't see any evidence that there is lead packing in the clutch teeth and the interior of the gearbox housing appears clean, BUT, it also appears to not have had any oil in it. From all the rust on bearings, prop shaft, and gears it seems this was a gearbox stored improperly. Rick Girard On Fri, Sep 3, 2010 at 3:16 PM, Roger Lee wrote: > > Hi Guys, > > I don't remember if I posted these pictures? If I did disregard. > > -------- > Roger Lee > Tucson, Az. > Light Sport Repairman - Maintenance Rated > Rotax Repair Center > 520-574-1080 > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=311283#311283 > > > Attachments: > > http://forums.matronics.com//files/binder3_621.pdf > > -- Zulu Delta Kolb Mk IIIC 582 Gray head 4.00 C gearbox 3 blade WD Thanks, Homer GBYM It is not bigotry to be certain we are right; but it is bigotry to be unable to imagine how we might possibly have gone wrong. - G.K. Chesterton ________________________________ Message 4 _____________________________________ Time: 03:28:31 PM PST US Subject: RotaxEngines-List: Re: Rotax 912 gearbox pictures From: "Roger Lee" Hi Rick, This gearbox has 30 minutes on it. It was a prop strike on a new plane and sent in for inspection and a dye test. The rust looking areas are actually Rotax factory use of Copper anti-seize for a lube during assembly. When I get one in with a lot of 100LL use at about 800+ hrs. I'll try and remember to post a picture. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=311300#311300 ________________________________ Message 5 _____________________________________ Time: 03:34:35 PM PST US Subject: RotaxEngines-List: Water in the fuel question From: "Roger Lee" Hi Guys,, Question: Which fuel are you more likely to see water in, 100LL or our present day 91 Oct when you catch your sample down at the gascolator? Why? p.s. If you find it in one verses the other what should yo do? -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=311301#311301 ________________________________ Message 6 _____________________________________ Time: 06:21:46 PM PST US Subject: Re: RotaxEngines-List: Water in the fuel question From: Richard Girard Roger, you didn't say whether the 91 octane mogas has ethanol in it or not, but I'm going to assume it has. Ethanol is hygroscopic, so it is the more likely to have water. If you find water in 100LL you drain it. Water in 91 means it has fallen out of solution in the gas so the best bet is to drain the tanks and lines and get new gas. I say that although I have just gone to the store and bought a can of Heet (pure ethanol gas line deicer) and dumped it in to put the water back in solution. In that case the gas was new, we were suffering from extremely high humidity (above 80%) for about 12 hours out of the day, and the aircraft had no fuel drain, just a clear filter where I could see the little bead of water. The HKS ran fine on it. The extra ethanol would have increased the octane of the fuel slightly and with a compression ratio of 11.3 to 1 it can use all the octane it can get. Rick Girard On Fri, Sep 3, 2010 at 5:34 PM, Roger Lee wrote: > > Hi Guys,, > > Question: > > Which fuel are you more likely to see water in, 100LL or our present day 91 > Oct when you catch your sample down at the gascolator? Why? > > p.s. > If you find it in one verses the other what should yo do? > > -------- > Roger Lee > Tucson, Az. > Light Sport Repairman - Maintenance Rated > Rotax Repair Center > 520-574-1080 > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=311301#311301 > > -- Zulu Delta Kolb Mk IIIC 582 Gray head 4.00 C gearbox 3 blade WD Thanks, Homer GBYM It is not bigotry to be certain we are right; but it is bigotry to be unable to imagine how we might possibly have gone wrong. - G.K. Chesterton ________________________________ Message 7 _____________________________________ Time: 07:24:11 PM PST US Subject: RotaxEngines-List: Re: Water in the fuel question From: "Roger Lee" Hi Rick, Your exactly right. The water in 100LL doesn't go into solution so you see it show up quick and the fuel is not H2O saturated. So if there was only a small amount in your sample tube then you shouldn't have any issues with the fuel retaining any water and the 100LL is ok to use. The 91 Oct. with the ethanol that most of us have to use will suspend the water which isn't a big deal because the Rotax will just burn it through. If you see water in 91 Oct. with the ethanol then it's time to drain your tanks because that means the fuel is saturated to the point that it can't hold anymore and now the water is accumulating in quantity. So when 91 Oct gets that saturated with H2O that you can visibly see it at your drain point it's time to dump that fuel. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=311326#311326 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-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/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-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.