Hi.
The engine will definately load up. I guess your still running it in. I had the same with mine and did a little research. My best advice is to lean it half a turn on the HSN. Through my experience this is perfectly ok . My engine is still great. The company sends them out set far to rich and the instructions for the needle setting turns are wrong but havent been updated. Hope this helps. Here is a link to the ofna forum. The info you need is here. [link=http://p202.ezboard.com/bofnaracingnitrotalkback]http://p202.ezboard.com/bofnaracingnitrotalkback[/link]