Vegassky,

I would not start buying new parts yet. It sound like the engine is running to rich on the low end. I have a Megatech .15 and it is a great little engine. Since you said that both of your needles are messed up right now, I can only assume that you do not have much experience tuning engines. The best way to get that thing tuned is to find someone at the field to adjust the needles. If you can not then follow these simple rules.

Start with the engine running at high throttle, tune it to get max RPM then back the needle out two clicks.

Move the throttle to the low throttle. If the engine revs up and then dies, then it is to lean. If the engine bogs down and then dies, then it is to rich.

If the carb has a small hole in the front, then moving the needle in, is adding more fuel. If no hole in the front, then moving the needle in is less fuel and moving it out is adding fuel.

I sure hope this helps you out.

Bob