---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Tue 06/26/12: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:00 AM - Re: Re: Fuel Pressure (Alvie Johnson) 2. 07:50 AM - Gascolator (BobbyPaulk@comcast.net) 3. 08:27 AM - Gascolator (BobbyPaulk@comcast.net) ________________________________ Message 1 _____________________________________ Time: 06:00:47 AM PST US From: Alvie Johnson Subject: Re: JabiruEngine-List: Re: Fuel Pressure Reply to jabiruengine-list@matronics.com=0A=0A=0A>_________________________ _______=0A> From: DaveG601XL =0A>To: jabiruengine -list@matronics.com =0A>Sent: Monday, June 25, 2012 1:00 PM=0A>Subject: Jab iruEngine-List: Re: Fuel Pressure=0A> =0A>--> JabiruEngine-List message pos ted by: "DaveG601XL" =0A>=0A>Bobby,=0A>=0A>Let me throw in an observation I had on my 601 during early flight testing that h ad a similar symptom which may or may not have anything to do with your exp erience.- My ACS gascolator came with the standard 120 micron mesh SS scr een (P/N 10543-1).- In the 2008 timeframe, ACS introduced a smaller 74 mi cron mesh screen (P/N 05-03436).- Thinking that smaller was better from a filtration standpoint, I bought a 74 micron screen.- Up to now I had no fuel delivery issues whatsoever and was only using fresh 100LL.- I put th e new screen in and all of a sudden I could not perform the standard mag ch eck run-up unless the boost pump was on.- Without the pump, the engine se emed like it was running out of fuel.- I sumped the gaslocator and only a small amount of fuel would come out, but when I pulled the screen, I got d oused with all the fuel sitting on top of it.- Hmmm, sounds kind of like your symptom.- I pulled the small mesh screen and, as expected with only 15 minutes of run time, it!=0A>- was clean.- I put the original l arger mesh screen back in and have been flying with it problem-free for alm ost 4 years now.- I think the 74 micron screen is just too small for the head pressure in a low wing airplane unless you plan to run boost pumps all the time.- I cut it up and threw it in the trash.=0A>=0A>Just something to consider depending on which gascolater and screen mesh size you may be u sing.=0A>=0A>Good luck,=0A>=0A>--------=0A>David Gallagher=0A>Zodiac 601 XL -B: flying, 200+ hours now=0A>Next project under construction: Aircamper=0A >=0A>=0A>=0A>=0A>Read this topic online here:=0A>=0A>http://forums.matronic =========================0A =========================0A =========================0A >=0A>=0A>=0A>=0A>=0A> ________________________________ Message 2 _____________________________________ Time: 07:50:36 AM PST US From: BobbyPaulk@comcast.net Subject: JabiruEngine-List: Gascolator Dave, Thanks for the info on the screen size in the gascolators. If the 100 micron size has been used since the Wright Bros. I wonder why it was changed?? Sometimes newer is not better. Your description of the episode you had fits exactly what happened to me. I will check the part number and replace if is the smaller size. Info like this may keep me and some others out of the trees. Thanks again Bobby ( age 74 ) Zodiac 601 XL "B" Jabiru 3300 S/N 1141 Sensenich 64" x 51" Prop Bing Carb 260 Main & 285 Needle Jet Status - Flying 155 hrs. Do Not Archive ________________________________ Message 3 _____________________________________ Time: 08:27:40 AM PST US From: BobbyPaulk@comcast.net Subject: JabiruEngine-List: Gascolator List, David and I were referring to the fuel that is trapped Downstream of the gascolator. It will be between the gascolator screen and the firewall or fuel pump( s ). When the gascolator is removed the screen is held in place with a thick gasket and tight fit around the inlet to the gascolator. The weight or pressure of the gasoline is not sufficient to flow backward thru the screen even if it is clean. It may even be under a partial vacuum. So when you slide a dental pick or knife blade under the screen to remove it you will get a backflow of the fuel that was trapped in the line. If you are lucky it will drip off your elbow. If you are laying down you will get an armpit full. Hope this clarifies what we experienced. Bobby Do Not Archive ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiruengine-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/JabiruEngine-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/jabiruengine-list Browse Digests http://www.matronics.com/digest/jabiruengine-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.