Hello All,

I was wondering if anyone could post tips on the running and setup of a ZDZ-40 engine. Last year, I was the RC pilot for my University’s UAV program, and we used an aircraft with a ZDZ-40 engine. It was always very hard to start. Once we could get it running, it seemed to run OK, but I was never really comfortable with the engine. I have a feeling that the reason for the hard starting was probably an incorrectly set carburator.

Now I’ve graduated, and the project has asked me to come back and act as the pilot/advisor this year. Now that I’m not concentrating on deliverables, and passing grades, I have more time to figure out how to set up the carb properly, and get the engine running reliably.

I have lots of nitro experience running both two and four stroke engines, but this is my first experience with a larger gas engine.

Could anyone with ZDZ-40 engine experience give me some tips. In particular, I’m looking for the following:

Starting procedure, both hot, and cold.
Carb setup procedure.
Typical props used, and the RPMs
Anything else I should watch for on this engine.

Thanks in advance,

Tom