Fuel leak around the fuel sending unit

[newtonhubcap]

Morning all, wanted to check and see if and am sure some one has dealt with a fuel leak stemming around the fuel sending unit. I had the tank out and installed new fuel sending unit o-ring with new lock ring using the Honda loc-ring tool and new fuel cap that the vent acutally works. Oddly, after installing the new items and 3 weeks later I seem to have the same fuel leak.

My question, has anyone dealt with this persistant issue, I am stumped. Thank you in advance for any input

The Kid!

 

[ST1100Y]

I only had the fuel pumps out...

Considering the age I'd recommend to check the rim on the tank for any signs of corrosion/peeling paint flakes, causing uneven surface the packing now fails to seal on...

When installing mentioned fuel pump, I used a new flange seal and applied a slight smear of silicone grease on the rubber (actually some soft plastic) helping it to slip and snuggle into place...
maybe same aids proper seating of the packing ring?

 

[newtonhubcap]

Appreciate the insight, surface is clean. Am thinking of applying Honda Bond 4 (gas resistant). Got to pull the tank and re - inspect.

Thank you!