Now that i have read some of the forums I'm confused.Problem is: I'm running the engine up (purchased used in a Comp-arf yak,appears to have very little time on it) and its not clearing out and I'm burning tons of fuel from earlier flights. I have only run a gallon and a half through at this point ,and I experience dead sticks if I idle down.On the ground the idle seems fine.Any comments or suggestions would be appreciated.I have had a da 100,and a 150 without any issue.

Tuning is everything with any size and type of gas engine. I don't know what you're running through the engine at the moment but if you're using a "break in" oil, and especially Lawnboy, get rid of it. In any case, it sounds like your engine needs tuned.

There are some excellent pointers on how to tune a gas engine in the newbies to gas engines sticky at the beginning of this forum. Just because it says it's for newbies does not mean people with some previous gas engine experience can't take advantage of the lessons taught in it. If you are not well experienced with gas engine tuning I'll suggest you take a little time to read what's already there rather than write so much of it all over again.

Dave,

Re-tune it....

Jody's gas engine tuning tips (pdf files);
http://www.rcuniverse.com/forum/fb.asp?m=10293852