Yeah, I have had to buy a few Float bowls for my 6hp Troy-Built Roto-Tiller.
The Float Bowl must be a level distance all the way around from the mounting surface.
Also, the inlet needle "rubber seal" doesn't last long. That's why I always liked the float bowls with the drains on them. Drying out the Carburetor when not using it for a long time saves the rubber.
One time I tried to buy an updated Plastic Float bowl and they wouldn't let me buy one because they would have to order it. Didn't make sense then, but now that they are out of business, it does now.:thefinger: