---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Thu 06/27/13: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:27 AM - Re: carb synch hose sizes (Roger Lee) 2. 02:59 PM - 914 Electric Fuel pumps (Alan Carter) 3. 03:10 PM - Re: 914 Electric Fuel pumps (Robert Borger) 4. 03:28 PM - Re: 914 Electric Fuel pumps (Dave) 5. 03:32 PM - Re: 914 Electric Fuel pumps (Alan Carter) 6. 03:40 PM - Re: 914 Electric Fuel pumps (Alan Carter) 7. 05:19 PM - Re: Re: 914 Electric Fuel pumps (Robert Borger) 8. 06:22 PM - Re: Re: 914 Electric Fuel pumps (Robert Borger) ________________________________ Message 1 _____________________________________ Time: 06:27:29 AM PST US Subject: RotaxEngines-List: Re: carb synch hose sizes From: "Roger Lee" I can get the needles dead on for idle and the high rpm settings. Once you do it a few times it doesn't take long. If you do it each annual or 100 hrs. it's a piece of cake. I always do a running engine. I wear goggles and ear muffs and I give that prop a wide berth. The wheels are always chocked and someone is in the cockpit. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center - Heavy Maint. Rated Home 520-574-1080 TRY HOME FIRST Cell 520-349-7056 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=403509#403509 ________________________________ Message 2 _____________________________________ Time: 02:59:40 PM PST US Subject: RotaxEngines-List: 914 Electric Fuel pumps From: "Alan Carter" Hi All. The other day haven flown, I was sitting on the ground engine stopped, I was fiddling with the GPS for about 25 mins, trying to learn how to store a route, I had left both fuel pumps running, ?? Heard the noise but it did not register, Crazy. Any damage or problem I may have caused , pumps running engine stopped on ground about 25-30 minutes. Alan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=403538#403538 ________________________________ Message 3 _____________________________________ Time: 03:10:38 PM PST US Subject: Re: RotaxEngines-List: 914 Electric Fuel pumps From: Robert Borger Hi Alan, As long as your fuel selector is set for fuel flow and there's fuel flowing through the pumps, they are probably OK. If you ever run a pump without fuel flow through it, it will only last about a minute before it fails. The fuel flow is absolutely necessary to cool and lubricate the pump. How was the flight? Blue skies & tailwinds, Bob Borger Europa XS Tri, Rotax 914, Airmaster C/S Prop. Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP 3705 Lynchburg Dr. Corinth, TX 76208-5331 Cel: 817-992-1117 rlborger@mac.com On Jun 27, 2013, at 4:59 PM, Alan Carter wrote: Hi All. The other day haven flown, I was sitting on the ground engine stopped, I was fiddling with the GPS for about 25 mins, trying to learn how to store a route, I had left both fuel pumps running, ?? Heard the noise but it did not register, Crazy. Any damage or problem I may have caused , pumps running engine stopped on ground about 25-30 minutes. Alan ________________________________ Message 4 _____________________________________ Time: 03:28:29 PM PST US Subject: Re: RotaxEngines-List: 914 Electric Fuel pumps From: Dave That may be if the pump is dry Dave Alberti 262-853-5421 On Jun 27, 2013, at 5:10 PM, Robert Borger wrote: > > Hi Alan, > > As long as your fuel selector is set for fuel flow and there's fuel flowing through the pumps, they are probably OK. > > If you ever run a pump without fuel flow through it, it will only last about a minute before it fails. > > The fuel flow is absolutely necessary to cool and lubricate the pump. > > How was the flight? > > Blue skies & tailwinds, > Bob Borger > Europa XS Tri, Rotax 914, Airmaster C/S Prop. > Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP > 3705 Lynchburg Dr. > Corinth, TX 76208-5331 > Cel: 817-992-1117 > rlborger@mac.com > > On Jun 27, 2013, at 4:59 PM, Alan Carter wrote: > > > Hi All. > The other day haven flown, I was sitting on the ground engine stopped, > I was fiddling with the GPS for about 25 mins, trying to learn how to store a route, I had left both fuel pumps running, ?? > Heard the noise but it did not register, Crazy. > Any damage or problem I may have caused , pumps running engine stopped on ground about 25-30 minutes. > > Alan > > > > ________________________________ Message 5 _____________________________________ Time: 03:32:06 PM PST US Subject: RotaxEngines-List: Re: 914 Electric Fuel pumps From: "Alan Carter" Hi Bob. Fuel selector was on, pumps working through out but it did notice a change in tone towards the end, The flight was good, the weather was good, the plane was good, and i was good in talking to Thames Radar, need the practice, Just by coincidence radar asked me to turn East, to avoid traffic, That evening i got an e-mail from the Capitan of the airliner, he had recognized my voice from years ago, and had me on his TECAS , and was watching me out of his window. Small world. right place at right time. Alan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=403541#403541 ________________________________ Message 6 _____________________________________ Time: 03:40:16 PM PST US Subject: RotaxEngines-List: Re: 914 Electric Fuel pumps From: "Alan Carter" Hi all. The pumps run continuously in flight, Fuel is going through, but on the ground no air flow around pumps,? Fuel returning to tank, via carbs bowels ? i think? Is there any chance of the fuel getting into the engine,? ie small jet nozzle . Alan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=403542#403542 ________________________________ Message 7 _____________________________________ Time: 05:19:51 PM PST US Subject: Re: RotaxEngines-List: Re: 914 Electric Fuel pumps From: Robert Borger Alan, One of the pumps runs continuously in the air. The other should be off. No more air flow around them in the air than on the ground if they are under the baggage compartment as per build manual. They are cooled by fuel flow through them. There's no fuel coming out of the float bowls except through the main jet. The float controls that and if it shuts the fuel off then no more fuel can get into the bowl. Excess fuel returns to the tank via the fuel pressure regulator. There should be no chance of fuel getting into the engine if all is plumbed correctly and the float is operating properly. There is an overflow on the float bowl should excess fuel be introduced but, if all else is correct, that shouldn't happen. Blue skies & tailwinds, Bob Borger Europa XS Tri, Rotax 914, Airmaster C/S Prop. Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP 3705 Lynchburg Dr. Corinth, TX 76208-5331 Cel: 817-992-1117 rlborger@mac.com On Jun 27, 2013, at 5:40 PM, Alan Carter wrote: Hi all. The pumps run continuously in flight, Fuel is going through, but on the ground no air flow around pumps,? Fuel returning to tank, via carbs bowels ? i think? Is there any chance of the fuel getting into the engine,? ie small jet nozzle . Alan ________________________________ Message 8 _____________________________________ Time: 06:22:41 PM PST US Subject: Re: RotaxEngines-List: Re: 914 Electric Fuel pumps From: Robert Borger Alan, Brain fart. The 914 float bowl is pressurized and therefore can not have an overflow. The 912 has the float bowl overflow. No fuel gets out of the float bowl on a 914 except through the main jet or starting carb (often referred to as "Choke"). So there should be no fuel getting into the engine with the fuel pumps on and engine not running. Blue skies & tailwinds, Bob Borger Europa XS Tri, Rotax 914, Airmaster C/S Prop. Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP 3705 Lynchburg Dr. Corinth, TX 76208-5331 Cel: 817-992-1117 rlborger@mac.com On Jun 27, 2013, at 7:19 PM, Robert Borger wrote: Alan, One of the pumps runs continuously in the air. The other should be off. No more air flow around them in the air than on the ground if they are under the baggage compartment as per build manual. They are cooled by fuel flow through them. There's no fuel coming out of the float bowls except through the main jet. The float controls that and if it shuts the fuel off then no more fuel can get into the bowl. Excess fuel returns to the tank via the fuel pressure regulator. There should be no chance of fuel getting into the engine if all is plumbed correctly and the float is operating properly. There is an overflow on the float bowl should excess fuel be introduced but, if all else is correct, that shouldn't happen. Blue skies & tailwinds, Bob Borger Europa XS Tri, Rotax 914, Airmaster C/S Prop. Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP 3705 Lynchburg Dr. Corinth, TX 76208-5331 Cel: 817-992-1117 rlborger@mac.com On Jun 27, 2013, at 5:40 PM, Alan Carter wrote: Hi all. The pumps run continuously in flight, Fuel is going through, but on the ground no air flow around pumps,? Fuel returning to tank, via carbs bowels ? i think? Is there any chance of the fuel getting into the engine,? ie small jet nozzle . Alan ------------------------------------------------------------------------------------- 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.