Fueling & Injection - Fuel pressure gauge sending unit leaking?

It seems to be leaking around the o-ring fitting thats on the sending unit? As you can see in these pics I marked it with an arrow. It was leaking around there and I replaced one side with that white plastic one. Still leaking.
Now do I have to get a new FP gauge sending unit? Or is there an actual washer that you can replace and tighten that nut back down? Thanks in advance.

http://i154.photobucket.com/albums/s278/tnmotown/617fd5a9edit.jpg

If fuel is at the wiring, the sender is likely bad. There should be a diaphram in there to isolate the fuel from the electronics.

If fuel is at the wiring, the sender is likely bad. There should be a diaphram in there to isolate the fuel from the electronics.

Thats exactly where its coming from! Ok so that diaphragm probably went bad. So do I get a new sending unit or just that ring? Will the auto meter #2242 sending unit be a replacement?

Oh, and since I just swapped the original one for that white plastic one (on the right side connector), the fuel pressure gauge will be peg'd on 100 PSI??

I appreciate the help!

Buy the sender that matches the gauge... no exceptions, no substitutions.
I would recommend a new Autometer gauge if you have a different brand.

Whatever you do, disconnect the one you have before you have a fire to deal with.

I have an autometer phantom fuel pressure guage. So that part number #2242 sending unit should work? It's says it's a electrical sending unit up to 100psi but says for oil?

http://www.jegs.com/i/Auto-Meter/105/2242/10002/-1?parentProductId=

^^^ See this ones says in the "Overview" bar thats its for all Autometer Electronic Gauges.
BUT then in the title, it says for oil pressure (100psi)????