ORIGINAL: skillet92
RCTOM I am by no means an expert i have a couple of smaller gas engines and one DL50. And I just ran it for the first time and i have a 23A Vess prop that i am using. I ran it for an hour at 2500 and still have one more to go before i fly it. I got the idle as low as 1500(almost to slow) and at 15 minute intervals i would open it up all the way for about 5 seconds. I got 7000 by 30 minutes and at the hour mark i was 7150. That is more than i could ask for being that the engine is new and i have not touched the carb at all.
You really need to tune that engine in and go ahead and mount it on your airframe and fly the thing, running these things on the ground is not so good for them because of no airflow over the head. They get really hot I had a friend that burnt up a DA new engine by doing this it lost all compression.