<div class="ubbcode-block"><div class="ubbcode-header">Quote:]the supply tube from the bowl to the jet is obviously open.[/QUOTE]
Both carbs at the same time? Hard to believe!
I finally got the bowls to fill by doing what Jack suggested (actually, I soaked the Grose jets in cleaner) & in the process of removing the carbs to check the jet supply tubes from bowls to carb bodies to make sure they weren't clogged (they weren't), I broke one of the jet supply tubes...so, I replaced it with a good used jet; however....
...with fuel flowing into the bowls & from them into the carbs themselves, the carbs will only run with starter fluid - not with gas! So, even though I had put 2-1/2 gallons of fresh gas in the tank when I started this ordeal, I'm draining it out right now as I type & will try some more new gas from a different station!
I also checked the plugs while I was going through everything & only #3 was moist (not much though) - so, I'm not flooding her.
...this is just strange! If it were old gas, I could believe things were gummed up blocking its flow & the gas wasn't good enough to 'ignite'...however, I drained the system before I parked it last year, fogged everything, & added new gas this year. So...........