Yep. Both my left carbs were overflowing after winter storage. Tapping didn't help. Drained the bowls and filled with Sea Foam. Let it sit for 4 days.
Pressurized the fuel line (turned on ignition). Still overflowing. Tapped the
bowls. Still overflowing. Tapped harder. Front left float sealed!
Encouraged, I worked the rear left carb like six or seven times; ie, 6 or 7 raps on top of the bowl area with a bar struck with a hammer, then check for overflow by turning on the ignition. I go through this cycle like 6 or 7 times, then... success!!! Oh, yeah!!
Don't forget to change the oil. That's a lot of gas down the intake.
Motor never ran better than now.
Thanks to the comments on this and the other "overflow" threads. :clapping: