Reply To: Exhaust pipe gasket

[Sam M.]

Hmm, so that’s a different situation than what I wrote about earlier.  Looks like a tiny little bit of pitting on that exhaust tube.  It looks pretty tight clearence-wise at the top between the tube and powerhead so maybe just add thin little layer of heat-resistant (and fuel-resistant) paint on the tube around the top section where to powerhead blocks it from being seen, and wipe the paint smooth before it dries so it doesn’t magnify the roughness of the tube.  This would hopefully smooth out the tube’s surface so the extra fuel wouldn’t escape by seeping down through the low parts of the slightly uneven pitted surface on the tube.

However, you mentioned a loose fit.  I’d be more inclined to suspect that is the problem and not the fuel leaking down through the minor pitting.  If the tube wiggles vertically, maybe a gasket somewhere else can be swapped for a thinner one to compensate for the gap and reduce the vertical clearance.   If it wiggles sideways, maybe try the paint to widen the tube just a bit.  Looks like a teeny tiny bit of material wore away somehow, circled in the attached image, but I don’t think that would be enough to cause the problem…

I haven’t tried any of this.  Just randomly brainstorming in hopes that something might help.  Good luck!