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Fuel Primer System

Posted By:
Frank Irvin
Homebuilder or Craftsman
3
Posts
0
#1 Posted: 9/24/2009 00:12:57

I installed a fuel primer in the cockpit of my Quad City Challenger with the primer line coming off the top of the gascolator.  However, I am unable to get fuel from the gascolator up to the primer in the cockpit, let alone to the engine.  Any suggestions?

Frank



Julian Smith
Vintage Aircraft Association MemberHomebuilder or CraftsmanAirVenture Volunteer
3
Posts
1
#2 Posted: 9/24/2009 21:23:02

Frank

Check the condition of the "O" rings in the primer, if they are good then the  check valve in the end of the primer pump may be stuck or leaking.

Julian



Neal Wright
2
Posts
2
#3 Posted: 9/24/2009 22:50:02

Frank...

Brand of the primer?  Sketch or picture unless too hard to get at. Or, purchased from??? Spruce?

A "dry" suck is suggestive of a misconnect, as though the output and input are reversed.  If I am successful in including a picture of my Kohler primer, the hard-to-see "INPUT" is positioned such that either fitting could be taken as the input.

Let us see if this works.

Neal

 

True to form, the next step for attaching a picture did not work.  I tested the primer and found that one can sense a vacuum when the plunger is withdrawn and one can sense a harder pull when the input is blocked and one can sense a tiny puff when the plunger is pushed in rapidly.  With two of you, one at the disconnected end at the gascolator and you pulling,  you could prove the same.

Later,  a different option appeared below the text portion and it looks like the image is attached.  Open in microsoft  phote editor and expand by moving the wheel on the mouse. 

Neal

 



Files Attachment(s):
Primer trimmed.jpg (42253 bytes)
Neal Wright
2
Posts
2
#4 Posted: 9/24/2009 22:55:26

Frank...

Yes, surprise, the primer image is attached but it opens in a program not seen before.  If you click on the page that opens with the image, a little brown four-pronged image that looks like two pills stacked will increase the size of the image if you click on it.

In case your primer is a Lunkenheimer, I will have to look at old images.

 

Neal



Frank Irvin
Homebuilder or Craftsman
3
Posts
0
#5 Posted: 9/25/2009 00:44:32

Thanks for the help Neal.  I purchased the primer kit, PN# 05-01047, from Aircraft Spruce.   It has been so long since I installed it I do not remember if the instructions mentioned anything about which fitting was the return or supply.   you can bet tomorrow I wil be testing my primer as you suggested.  However, can this simple primer pull fuel a distance of about 7 feet horizontally and about 2 feet up vertically?  Would a better quality primer be advantageous?

The picture you attached turned out pretty good.  Thanks again for all your effort.

 

Frank



Frank Irvin
Homebuilder or Craftsman
3
Posts
0
#6 Posted: 9/25/2009 00:47:39

Thanks for the  idea Julian, I will check the O-rings and check valve.

Frank