Lunkenheimer Primer / Leaks

oh, ACE Aircraft supply, good store, there is one near my home airport.

Larry,
Where did you wrap the Teflon packing string and where did you purchase it?

Don H

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

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.