Hope you folks don't mind me butting but I have a DLE 30 with more or less the same problem. It started and ran great last year but after storing for a few months won't start. If primed it starts and runs great but no matter how many times I flip the prop I can't get it to pop. I've been reading the various forms and did replace the filter screen and looked at a rubber diaphragm on opposite side of the carb. It looks good and is flexible. I keep hearing the term "Reed Block and Pulse Line" which could cause the problem. Where in the carb is this found, on the filter screen side or the side with the plate held on by four screws. I've tried to find a site with an exploded view of the carb without success as it would really help.
Thanks,
Rich