RE: ZDZ 80 Hard to start
I just got a plane with a ZDZ engine that I couldn't start Sunday afternoon. This was my first attempt at learning the recipe for starting. I flooded it because I wasn't familiar with the radio. The old owner had the choke on a slider and I got the open and closed backwards. Finally got it running but couldn't repeat it after I put the cowl back on. Will try again when I get a chance. What makes these things so hard to start? My 3W 85 twin starts right up with the usual choke and pop, then no choke and 4 flips. I saw the old owner start the ZDZ up with the 5/5/1 routine so I know it will run. Is there something about the way they are built that makes them prone to flood? I'm using the Mobil oil with 93 octane.