Well 30 year, I found another problem upon opening the casing. The fuel line had a small tear, leaking at the carb. I cut off the bad spot, and reconnected line to carb.
I also, removed the adjustment screws for the HI / low mixture, and shot some gumout carb cleaner w/ straw thru them. The original settings were 1 1/2 open for the low, and 1 turn open for the high side. Idle screw was at 1 1/2 turns out.
I then TRIED to start the engine ............ NO START what-so-ever. Not even a sputter, until I primmed it thru the air intake w/ gumout spray. THEN IT WOULD RUN OFF THE PRIMES, BUT THAT'S IT. I haven't tried the compressed air yet, that will be next ! Unless there's a better idea short of removing the carb to clean it, or soak it.
It just seems to me that these small passageways may require a super small cleaner wire run thru them.... Maybe, a few thousands diameter would work.
Anyway, Please give me your take on this stuff. Thanks, Jim.