ive used the wd-40 on the solex on my karmann ghia to trace air leaks, but i cant even get this thing to start and run. the last time we ran it (yesterday) it ran thru pretty much a whole tank. it died as i was reaching for the kill switch. the tank was almost empty. hmm maybe i sucked a piece of dirt or something into the carb? a buddy is going to bring me a new crab to try.