Got another Well Crap here too....

[pstephens46]

Ok. All gooped up with the 518. Let it sit tonight and set up as it may. Going Luca Brasi if this doesn’’t work.....

maybe it is the IPhone but punctuation does not seem to be working well.

[pstephens46]

518 held up for a good hard run today.

[zenoahphobic]

518 held up for a good hard run today.

When running the engine the fuel sucked will reduce the pressure on that seal.
A pressure test like blocking the fuel outlet and the breather, and letting the tank warm up by rise in temperature of the day, would be a better test if one is concerned that the seal will hold out.