Thread: Fuel Resistant Potting Compound?

I looked into the Permatex stuff but it's not exactly what I'm looking for.

I guess the best way to describe things is that there is a hard, resin-like substance that the wires pass through in the bottom of the mounting plate that the fuel pump sits on (inside the tank). If the wiring is the problem, I'll have to remove some of that "resin" stuff, make the wiring repair and then re-seal the area so no fuel leaks from the tank.

Hope that clarifies things a bit. I'll try to take a few pictures this evening, as well.

Araldite is a UK brand name for 2 part epoxy glue - use any slow set 2 part epoxy, it will work just fine.

Hmmm... that Devcon might work but, as SoB stated earlier, will it adhere to the existing resin?

I've used Pro-seal when sealing aircraft fuel tanks and think some B 1/2 might work nicely but there is still the adhesion question.

This might take some research as I'm not too keen on trial and error when the area in question is directly above a header. For some reason that image of CE on the Aprilia fireball comes to mind.

I confirmed that there is a bad connection within the potting compound. Out of the four wires going through the bung, three ohmed out good but the power wire to the fuel pump showed about 25 kOhms of resistance.

I put 12 VDC directly to the pump and it spun like there was no tomorrow. At least I saved myself $260 on a fuel pump I don't need.

There is a part number for the short harness and I'm going to try and order that first. If it is not available, then repair is Plan B. I'm going up to Dallas next week and will snag some Pro-seal if I haven't sourced something locally by then.

Haven't gotten past the ohmming out stage. However, there is no "yanking out" option - I tried

The harness is available (believe it or not) and I replaced my fuel pump order with the harness, saving about $200. It's a standard remove-and-replace at this point but I'll probably repair the damaged harness anyway just so I have a spare at the ready. If this one broke, what's stopping the replacement from the same demise?

edit: No photos yet but I plan on taking a few once my parts arrive, which should be sometime next week.

Originally Posted by SomeStrangeGuy

I just sat here laughing for about 3 minutes at this, then realized I am just overtired (edited to fit how I misread it).

Great way to start the day!

That cracked me up! I'll take a few photos prior to my pants arriving to really make it interesting...

Update: Even though the wire harness is in stock Stateside, it won't be at the dealer until this Friday or Monday (slowest pony, I suppose) and then the dealer has to ship that to me. The earliest I could be back up and running is next weekend.

Now that I have some time to stew, I started picking away at the existing potting compound (which appears very similar to JB Weld). I took some pictures last night but the wife snagged the camera and I'll have to track those down. Since the harness replacement is fairly straightforward I think I'm going to try to repair the existing harness and maybe shake it down until the replacement gets here.

I'll post photos later if anyone is interested.