I'm still having fuel delivery problems with my walbro. I took the carb apart and their was some crud under the diafram and I cleaned it out and reinstalled the carb. Now when I flip the prop with the choke on I can see the fuel move in the line with each flip but it still does not run properly. It responds to low end needle adjustments but the high end does not respond to the needle at all, it just dies when you give it over half throtle. I think my next step is to borrow a carb from another club member that I know works and see if it is completely a carb problem or if there is something with this engine that will not allow a larger carb to draw the fuel it needs.