None of the Wabro carbs that I have worked on has a float, they have had a diaphram that will get stiff and brittle with age and should be
replaced at that point.
You're right - my terminology - no float but a diaphragm. I took it apart and a mower guy thought it should be replaced, so a kit is on order.
I don't know how much it could have to do with any of this. But two things to watch. (1) make sure your CDI connection
is good and solid. Mine wasn't and it was causing all kinds of problems until I fixed it. (2) make sure your carb is clean. I
had run my Walbro without an in-line filter near the carb. My engine starting running like crap. I finally got around to
removing the top of the carb and the diaphram. Low and behold, all kinds of junk was trapped in a small chamber there.
It had been blocking one of the fuel ports. Cleaned it out and put a Sullivan filter right next to the carb. No problem
since. No matter how clean you think your gas is, it is full of "stuff".
Mine also had stuff in the little trap inside the carb. I think I will also go with an inline filter.
As the problem was fuel draw, I doubt the CDI connection was an issue. When the diaphragm was removed, it had some "small puckers" in it, which some said it should be replaced.
When I get the carb kit and rebuild the carb, I'll let you know how it goes.
Thanks for the input so far! You guys are great