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lunkenheimer primer

 
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David Sbur



Posts: 1588
Location: KVUO Pearson Airpark, Vancouver WA

PostPosted: Sun Feb 06, 2011 11:23 pm    Post subject: lunkenheimer primer Reply with quote

Does anyone have a pic of an apart Lunkenheimer primer? I know mine doesn't have o-rings and I need a thread-like packing material for the stem. Mine works and doesn't have any visible leaks, but a hangar discussion suggests that my idle-cutoff issues (have to run up the rpms 2000-ish before I pull the mixture off to shut down the engine) for my 0-200 (MA3SPA carb) may be the primer allowing some fuel to get by. First off I'll try plugging off the primer.

I doubt this is my problem but if anything I'd like the info for my files.



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Dave Sbur/Vancouver WA
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dcm



Posts: 22
Location: Birmingham/Tuscaloosa AL

PostPosted: Mon Feb 07, 2011 11:11 am    Post subject: Reply with quote

I think I have one like that. I'll look tonight and take a picture....btw I have two Luke's. One is shorter than the other...I would like to sell them.

Dale
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John C



Posts: 4139
Location: New Hampshire - KLCI

PostPosted: Mon Feb 07, 2011 12:41 pm    Post subject: Reply with quote

If I recall correctly, there is a spring loaded brass "needle" on the end of the plunger that closes off the outlet of the pump chamber when the plunger is locked.
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www.skyportservices.net
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Jim Doody



Posts: 4

PostPosted: Thu Sep 22, 2011 7:30 pm    Post subject: Reply with quote

In regard to the Lukenheimer primer does anyone know the size on the inlet/outlet fittings? Mine is not 5/16-32 or 24, in fact I do not believe it is a US standard pitch. My 32 tooth pitch gage runs out about 5-6 teeth in so it's not 32 pitch, maybe 34 or 36. Here's a pic beside a 5/16-32 primer nozzle. Any help appreciated. Jim


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John C



Posts: 4139
Location: New Hampshire - KLCI

PostPosted: Fri Sep 23, 2011 1:42 pm    Post subject: Reply with quote

Re you sure it's not a pipe thread? Do you have a 27 tpi gauge?
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nyxon



Posts: 210

PostPosted: Fri Sep 23, 2011 5:58 pm    Post subject: Reply with quote

My Lunkenheimer doesn't work at all. Where can I purchase O rings for it?


Nick
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Jim Doody



Posts: 4

PostPosted: Fri Sep 23, 2011 7:48 pm    Post subject: Reply with quote

I do not have 27 tpi gage, I expect it to use a compression nut like all the rest but at this point I just do not know. It fits an 8mm bolt gage perfect, am I heading in the wrong direction? Perhaps NPS? The Luke primer has no O rings. Go to True Value aviation supply and get some 3/32 teflon valve packing. Be sure the little washer on the shaft is not worn to the point it falls into the primer. Wrap about 4 turns of packing around the shaft between the washer and lock nut. Lube with EZ turn and you should be good to go.
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Jim Doody



Posts: 4

PostPosted: Fri Sep 23, 2011 7:59 pm    Post subject: Reply with quote

I do have a 27 tpi gage, N/G. Re-checking it leads me to think it 32 tpi, close to 5/16 but no go. You can see the difference in the pic. Any further advice appreciated.
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nyxon



Posts: 210

PostPosted: Fri Sep 23, 2011 9:09 pm    Post subject: Reply with quote

Thanks for the info Jim.


Nick
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John C



Posts: 4139
Location: New Hampshire - KLCI

PostPosted: Sat Sep 24, 2011 10:14 am    Post subject: Reply with quote

Where did you get the primer? I have an installation drawing for a Lukenheimer D-4010 primer in an Ercoupe. It shows AN816-2D fittings screwed into female 1/8" pipe threads on the primer.

Looks like yours is an "outie" and you need an "innie"....

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Jim Doody



Posts: 4

PostPosted: Sat Sep 24, 2011 3:26 pm    Post subject: Reply with quote

Must be a different model primer as mine is threaded on the outside. Where did I get it? Came with a Champ project about 30 years ago and I have just decided to use it. Very Happy Jim
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