I've read your posts on the "vaporized alcohol" before. How can you explain this being the only engine that developes this phenom? My other 91FX also has bubbles and works great but this engine has been gone over a thousand times by many "xperts" and still runs rich on the ground and lean on the air with frequent and numerous dead sticks.

Like what was said in another forum, if you pay top dollar ( and you do pay extra for OS ) for an engine, you shouldn't have to bury it in a coffee can under a full moon, sprinkle it with eye of newt and then fly it only on the third Tuesday of the odd monthes. Other engines, all other OS's in fact, don't have these problems.

Whew. That was like opening an old wound. I had almost forgotton my $200 trophey on the shelf until I read this thread.