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03-19-2012, 02:57 PM
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Join Date: Sep 2007
Location: Columbia SC
Posts: 62
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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.
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03-19-2012, 04:03 PM
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Join Date: Nov 2007
Location: Jesup, Iowa
Posts: 1,657
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Another note - -
Leading Edge has/had the program to get about 1/2 credit back. Maybe the program was limited - ASK !
John Bender
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03-24-2012, 09:44 PM
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Join Date: Dec 2008
Location: Lacey, WA
Posts: 1,365
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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"
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03-25-2012, 07:58 AM
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Join Date: Mar 2008
Location: Texas
Posts: 1,378
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Quote:
Originally Posted by morsesc
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.
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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
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03-25-2012, 09:55 AM
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Join Date: Oct 2010
Location: Aguanga, Ca
Posts: 55
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Received engine in january.
What do I look for to determine which one is on my engine (still in the crate)?
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03-25-2012, 09:58 AM
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Join Date: May 2008
Location: Friday Harbor, Wa
Posts: 300
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The new one will have 3 hose barbs, the old one only had 2
__________________
MRT890
120042 RV-12
N112XP
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03-25-2012, 01:16 PM
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Join Date: Nov 2011
Location: Hansville, Washington
Posts: 536
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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
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03-25-2012, 02:35 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by NASA515
"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
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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.
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03-25-2012, 02:59 PM
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Join Date: Nov 2011
Location: Hansville, Washington
Posts: 536
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"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
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03-25-2012, 04:21 PM
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Join Date: Dec 2008
Location: Lacey, WA
Posts: 1,365
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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
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