Thank You Very Much, Cen Racing !! Your detailed reply was very helpful. I did find a couple of things that I was doing wrong. Where I live, its very cold. One of my friends suggested buying a small hair dryer, to properly warm up the engine first, then make attempts to start the engine. With a new NX 3.0, I have found that it was very difficult to get it started and running, even before worrying about getting it properly running during the break in procedures. After warming up the engine first, it saved me much wear and tear on efforts of keeping the engine running. Thanks for the Break In HSN and LSN settings. I have a few Cen MT2's so your suggestions will work for both the NX-16, NX-18, and NX3.0. Thanks a million.