Originally Posted by
the Wasp
you must use a muffler to pressurize the tank !
culd the O-ring under the carb be missing, or leaking ?
Jim
. The O-ring is fine. I always use the muffler, but now I'm going to try it without it, just how it tests. 60 years ago, there were no silencers in Mexico. The engines were sold without them and the engines worked more or less well but with more noise. You used to get used to it.