---------------------------------------------------------- Pulsar-List Digest Archive --- Total Messages Posted Tue 05/22/12: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:12 AM - Pulsar Reunion update (GREGSMI@aol.com) 2. 07:43 AM - Re: Trouble Shooting N912RV (Bernard Wilder) 3. 08:48 PM - Re: Trouble Shooting N912RV (Bob Heiser) 4. 10:51 PM - Re: Trouble Shooting N912RV (Keith Palmer) ________________________________ Message 1 _____________________________________ Time: 06:12:13 AM PST US From: GREGSMI@aol.com Subject: Pulsar-List: Pulsar Reunion update Garmin will be attending this year. They will display their products and be talking about all the new features. I am working with Bing carburetor and hope they will attend. I am looking for a DAR to talk about inspection and registration and a volunteer to talk about flight testing. I am moving forward with planning so will get the official announcement out this week. Any other topics you would like to see on the agenda? Take care and be safe, Greg ________________________________ Message 2 _____________________________________ Time: 07:43:45 AM PST US Subject: Re: Pulsar-List: Trouble Shooting N912RV From: Bernard Wilder Bob, When you first took the fuel system apart you said that you could not blow back through the electric fuel pump. You said there was a check valve. Later you said that you could blow through it in both directions.Doesn't sound consistent. Is it possible that there is an intermitent fault with the check valve in the electric fuel pump ? ? ? ? If you still have it, shake it up, blow in both directions, abuse it to see if you can get it to behave differently. Question: Did you have a bleed back line to the fuel cells eminating from between the engine fuel pump and the carbs ? ? ? Before I put mine in I would occasionally have trouble starting a hot engine and once had the engine stop because vapor lock had prevented fuel flow. (( I was still on the ground.)) Bernie Wilder On Sun, May 20, 2012 at 10:26 AM, sonja.englert@juno.com < sonja.englert@juno.com> wrote: > sonja.englert@juno.com> > > I can confirm that the Pulsar fuel system is a bit marginal from the point > of view of always providing enough fuel flow to the engine, especially at > high power settings / steep angles. I have had my share of problems. Small > things or restrictions can cause the carb bowls to be filled incompletely > which first leans out the engine, can cause it to run rough and in the > worst case cause power loss. I always run the electric pump on takeoffs. > > Sonja > > ____________________________________________________________ > 53 Year Old Mom Looks 33 > The Stunning Results of Her Wrinkle Trick Has Botox Doctors Worried > http://thirdpartyoffers.juno.com/TGL3131/4fb8ff6c485fb183b4b9st02duc > > ________________________________ Message 3 _____________________________________ Time: 08:48:06 PM PST US From: Bob Heiser Subject: Re: Pulsar-List: Trouble Shooting N912RV *God Bless Bob Heiser W7IKT* On 5/22/2012 9:42 AM, Bernard Wilder wrote: > Bob, > When you first took the fuel system apart you said that you could not > blow back through the electric fuel pump. You said there was a check > valve. Later you said that you could blow through it in both > directions.Doesn't sound consistent. Is it possible that there is an > intermitent fault with the check valve in the electric fuel pump ? ? ? ? *You are right it is a puzzle as to why I could blow thru the 12v fuel pump both ways after removing it. Best guess it was from the rough handling removing the pump. Actually there are 2 check valves in the pump, one fixed and one on the shuttle that moves the fuel. I have the pump back from the NTSB after they took it apart. I have inspected it and run it and do not see how it would block the fuel flow. Yes I have run it in different positions. * > > If you still have it, shake it up, blow in both directions, abuse it > to see if you can get it to behave differently. *I have tried.* > Question: Did you have a bleed back line to the fuel cells eminating > from between the engine fuel pump and the carbs ? ? ? *NO.* > Before I put mine in I would occasionally have trouble starting a hot > engine and once had the engine stop because vapor lock had prevented > fuel flow. (( I was still on the ground.)) > Bernie Wilder > ** ________________________________ Message 4 _____________________________________ Time: 10:51:13 PM PST US From: "Keith Palmer" Subject: Re: Pulsar-List: Trouble Shooting N912RV On Sunday I went up in a plane Cech factory built - with a 912S and had mentioned your problem to the owner so, he put the electic pump on for 15 seconds - turned it off - turned the fuel off at the selector - started, the oil temp came up in about 4 minutes then soon after the RPM started to die, turned fuel on - electic pump on - and we were away again, to the holding point for take off ?? ----- Original Message ----- From: Bob Heiser To: pulsar-list@matronics.com Sent: Wednesday, May 23, 2012 5:44 AM Subject: Re: Pulsar-List: Trouble Shooting N912RV God Bless Bob Heiser W7IKT On 5/22/2012 9:42 AM, Bernard Wilder wrote: Bob, When you first took the fuel system apart you said that you could not blow back through the electric fuel pump. You said there was a check valve. Later you said that you could blow through it in both directions.Doesn't sound consistent. Is it possible that there is an intermitent fault with the check valve in the electric fuel pump ? ? ? ? You are right it is a puzzle as to why I could blow thru the 12v fuel pump both ways after removing it. Best guess it was from the rough handling removing the pump. Actually there are 2 check valves in the pump, one fixed and one on the shuttle that moves the fuel. I have the pump back from the NTSB after they took it apart. I have inspected it and run it and do not see how it would block the fuel flow. Yes I have run it in different positions. If you still have it, shake it up, blow in both directions, abuse it to see if you can get it to behave differently. I have tried. Question: Did you have a bleed back line to the fuel cells eminating from between the engine fuel pump and the carbs ? ? ? NO. Before I put mine in I would occasionally have trouble starting a hot engine and once had the engine stop because vapor lock had prevented fuel flow. (( I was still on the ground.)) Bernie Wilder ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message pulsar-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Pulsar-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/pulsar-list Browse Digests http://www.matronics.com/digest/pulsar-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.