Ye all knowing RC people:

I looked a good bit for this information on Google and here on RCU. I also found the manual for the engine on Evolutions site, but it's pretty generic.

I bought a low wing trainer with an Evolution .61 2 stroke. I pulled the muffler off and there are no deposits in the engine at all. The overall condition leads me to believe the engine is new. Regardless, I am having touble I am trying to work out.

The engine transistions a tiny bit rough, surges in the air, cuts back at WOT, starts perfectly and is smooth as silk once it stabalizes at an engine speed. The surging is very wierd. That is my main concern. It seems to be running lean. If I richen it up on the HS needle it runs a little better, but the funny thing is it putting out a LOT of raw fuel in the exhaust. I puddles and drips out the pipe. After 2-3 flights my entire plane is sticky. In the air there is a steady white plume trail behind the plane. It really looks like it's blowing out as much fuel as it's using.

*I'm running 10% Cool power
*The glow plug is good and clean and new
*Everything appears to be tight, and doesn't appear to leak fuel/oil from anywhere (eg. under the carb)
*The engine has excellent compression
*The "set right needles" have been moved several times in an effort to tune it. I know they are factory preset, but I don't know the history of the engine, so I don't know if they had been moved by the previous owner or not.
*The engine does not get hot, maybe 200 F at WOT 60seconds on the bench.
*I'm running a 11x7 three blade prop.
*Fuel tank is in-line (physically) with the main needle about 2" away. If anything it might be MAYBE 1/8" lower, Maybe.... Hard to tell.
*The lines are new and no bubbles appear to be present. No foam either.

I am not new to glow, but am still learning. I set the LS and HS needles just as I have on other engines. It just doesn't respond to changes like the other engines. I can't figure out why it's running so rich though it acts like it's running lean.

Information or links to other posts would be appreciated.

Thanks all!