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Lunkenheimer Primer / Leaks

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12 Sep 2021 17:22 #1 by Matt Gunsch
Replied by Matt Gunsch on topic Lunkenheimer Primer / Leaks
oh, ACE Aircraft supply, good store, there is one near my home airport.

A&P, IA, PPSEL
too many years GA and Warbird Maint
Check out the Ercoupe Discussion group on facebook

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12 Sep 2021 02:57 #2 by Larry Snyder
Replied by Larry Snyder on topic Lunkenheimer Primer / Leaks
Some aviation store where they wear red vests…

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11 Sep 2021 20:11 #3 by Donald Hudson
Replied by Donald Hudson on topic Lunkenheimer Primer / Leaks
Larry,
Where did you wrap the Teflon packing string and where did you purchase it?

Don H

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06 Nov 2015 14:35 #4 by Larry Snyder
Replied by Larry Snyder on topic Lunkenheimer Primer / Leaks
I rebuilt mine with Teflon packing string. Works better and hasn't leaked since, about 5 years now.

Larry
N99340

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02 Nov 2015 00:13 #5 by Jerry Loeffelbein
Replied by Jerry Loeffelbein on topic Lunkenheimer Primer / Leaks
I just repaired my 1946 C model primer. I bought the kit ACS sells - that was a waste of money, as my primer has NO "O" rings; it just has a brass plunger on the end of the shaft, and leather packing under the nut. Be sure the gas is off, and unscrew the nut under the primer knob. The plunder will pull out. If it's like mine, hold the knob with a water pump pliers, and unscrew the brass tip that has the needle sticking out of it. There is a spring behind the needle, so be aware of it. Once the brass plunger end is off, you can pull the shaft through the nut. There is a thin brass cup-shaped washer showing, and under that the leather packing. I just pulled the packing out and oiled it, letting it soak and swell. Then I pushed the leather back in, replaced the brass washing, screwed the plunger back on, and re-installed the whole thing. No more leaks. I suspect no one ever oiled the shaft, so the leather dried out. Now that I know how it is built, I will give it some oil at least every annual. Jerry Loeffelbein, Ercoupe 415C, serial #388, Cashmere, Washington
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  • 10088
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09 Oct 2015 16:34 #6 by 10088
Lunkenheimer Primer / Leaks was created by 10088
I have a 1948-E model with a Lunkenheimer primer. It leaks gas in my hand when I prime the engine…
Has anyone rebuilt this primer?
Does it have o-rings or use "packing string"/ graphite or teflon?
Any help would me greatly appreciated.

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