muffler from my 78 garelli supersport is clogged up. runs fine without it on, but when i put it on it bogs down and stalls out.
i've been soaking it in degreaser and water, hosing it out, putting oven cleaner in it and letting sit, then hosing it out... and yes carbon chunks are falling out but it isn't helping enough.
who knows how to thoroughly clean one? i've talked to a few muffler and radiator shops, but no one is willing to put it in a boil out tank, which we thought would do the trick. so, what kind of toxic, nasty chemicals do i need? would boiling it on the stove in hot water loosen it up?
someone has to have a great solution... thanks