VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #11  
Old 03-19-2012, 02:57 PM
morsesc morsesc is offline
 
Join Date: Sep 2007
Location: Columbia SC
Posts: 62
Default

Thanks John (and everyone)... I have a new pump on order. If anyone else is interested, Leading Edge Airfoils has a few in stock @ $167.00 ea. Now I guess I need to call Van's and get the parts for the fuel drain. Just when I thought I was finished building .

Rick.
Reply With Quote
  #12  
Old 03-19-2012, 04:03 PM
JBPILOT JBPILOT is offline
 
Join Date: Nov 2007
Location: Jesup, Iowa
Posts: 1,657
Default Another note - -

Leading Edge has/had the program to get about 1/2 credit back. Maybe the program was limited - ASK !

John Bender
Reply With Quote
  #13  
Old 03-24-2012, 09:44 PM
Tony_T's Avatar
Tony_T Tony_T is offline
 
Join Date: Dec 2008
Location: Lacey, WA
Posts: 1,365
Default A look at the new fuel pump

This is a continuation of my post above, #6. I have received the pump and am posting a picture showing the configuration. Several features are pertinent.
1. Note that the pump comes with the required spacer and O-Ring, so you need not order them seperately.
2. The Rotax Illustrated Parts Catalog says to install the spacer with Loctite 5910 flange sealant. That product comes in a caulking gun size tube for about $45.00! We checked with our local Rotax certified mechanic and found that Loctite 598 can be used. This is available in a .5 oz. tube from McMaster-Carr for less than $5.

3. The vent line and outlet line are 1/4" and the pump inlet line is 5/16" so two sizes of Oetiker clamps are needed. I think I have the correct sizes but won't know for sure until I pull off the old lines to check. Oetikers are marked with size.
4. As mentioned before, you will need to cut off the old clamps and reinstall the fuel lines and firesleeve with new clamps.

These are the tools and clamps needed. Oetiker clamps (pinch clamps) are available from McMaster-Carr and firesleeve clamps are available from Aircraft Spruce.
5. I note that the attached card indicates the fuel pump is set for 4.7 psi at 1600 rpm. I assume that is propeller RPM as the pump is driven off the front of the gear case. My Dynon indicates the old pump regulates at 3.7 to 3.9 psi, however I don't know how well the sensor is calibrated, probably not very well. It will be interesting to see what the new fuel pressure indication will be.

I have an annual condition inspection coming up in a month and will wait to install the new pump at that time.

Tony
__________________
Tony
E-LSA RV-12 ULS

Last edited by Tony_T : 03-25-2012 at 09:41 AM. Reason: Change "manual" to "Illustrated Parts Catalog"
Reply With Quote
  #14  
Old 03-25-2012, 07:58 AM
Peterk Peterk is offline
 
Join Date: Mar 2008
Location: Texas
Posts: 1,378
Default

Quote:
Originally Posted by morsesc View Post
Thanks John (and everyone)... I have a new pump on order. If anyone else is interested, Leading Edge Airfoils has a few in stock @ $167.00 ea. Now I guess I need to call Van's and get the parts for the fuel drain. Just when I thought I was finished building .

Rick.
Rick,
Keep in mind, the fuel drain is simply a "leak" escape. It serves the same purpose as the weep holes on the old one which of course dripped directly onto the muffler! You can route the "escape" anywhere you want as long as you don't crimp it or block off the opening in any way...the pump will stop, yikes!

Pete
Reply With Quote
  #15  
Old 03-25-2012, 09:55 AM
RV12Roger RV12Roger is offline
 
Join Date: Oct 2010
Location: Aguanga, Ca
Posts: 55
Default Received engine in january.

What do I look for to determine which one is on my engine (still in the crate)?
Reply With Quote
  #16  
Old 03-25-2012, 09:58 AM
mrt890 mrt890 is offline
 
Join Date: May 2008
Location: Friday Harbor, Wa
Posts: 300
Default

The new one will have 3 hose barbs, the old one only had 2
__________________
MRT890
120042 RV-12
N112XP
Reply With Quote
  #17  
Old 03-25-2012, 01:16 PM
NASA515 NASA515 is offline
 
Join Date: Nov 2011
Location: Hansville, Washington
Posts: 536
Default Rotax Fuel Pump

"I blew the old style fuel pump on take off last week (rough running engine, loss of power, high fuel flow, low fuel pressure and smell of fuel)."

Not good, IMHO. VERY not good. Eventually, a serious accident is bound to happen - I don't want to be there at the time.

I have a new engine, never run since installed, with the old pump. I plan to change it out before my initial run to avoid it going south on me in an unhappy way.

Wonder what my chances are of getting a new swap out of Rotax?

Bob Bogash
N737G
Reply With Quote
  #18  
Old 03-25-2012, 02:35 PM
rvbuilder2002's Avatar
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
Default

Quote:
Originally Posted by NASA515 View Post
"I blew the old style fuel pump on take off last week (rough running engine, loss of power, high fuel flow, low fuel pressure and smell of fuel)."

Not good, IMHO. VERY not good. Eventually, a serious accident is bound to happen - I don't want to be there at the time.

I have a new engine, never run since installed, with the old pump. I plan to change it out before my initial run to avoid it going south on me in an unhappy way.

Wonder what my chances are of getting a new swap out of Rotax?

Bob Bogash
N737G
As already mentioned, Rotax currently has an exchange program that will get you an approx. 50% discount if you send in the old style pump.


Just food for thought.... I keep reading post about people planning to remove the old pump, before they even fly. How do you know the new pump is better? It doesn't have much field experience yet... it could end up being a problem just like the last couple of iterations.

I don't mean to say that I think it is a bad idea to change before the old one fails (this new pump does look and sound promising)... just don't become complacent and assume that just because it is the newest pump available, that it is guarantied to be without problems.
Reply With Quote
  #19  
Old 03-25-2012, 02:59 PM
NASA515 NASA515 is offline
 
Join Date: Nov 2011
Location: Hansville, Washington
Posts: 536
Default

"How do you know the new pump is better?"

Excellent point. The one thing we DO know is -- the old pump has reliability problems. Of course, its mortality is nowhere near 100%. So, some - maybe most - people have had no problems despite hundreds of in-service hours.

Obviously, the manufacturer recognizes they have a problem or they wouldn't have rolled into a new design. Clearly, the new pump could have reliability issues of its own. But, the new drain line addresses my primary concern - raw fuel in the engine compartment.

Bob Bogash
N737G
Reply With Quote
  #20  
Old 03-25-2012, 04:21 PM
Tony_T's Avatar
Tony_T Tony_T is offline
 
Join Date: Dec 2008
Location: Lacey, WA
Posts: 1,365
Default Exchange policy is what exactly?

We don't really know the exchange policy, especially on old style pumps that have not failed. Some have, and some have not, got a 50% refund and you will have to invest another $15 to UPS the thing back.

I will tag the the old, unfailed pump and put it in my bin of misc. parts rather than invest more money to send it back in hopes of recovering 1/2 of the $115.95 that the new one cost me. That's just me, everyone is different .

Tony
__________________
Tony
E-LSA RV-12 ULS
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 05:53 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.