RE: Troubleshooting O.S. 46 problem
Jeff,
Although the break-in procedure is far from optimal, for ultimate longevity and performance; I doubt it can cause immediate damage to your OS.
These engines are designed to not need a real break-in... Doing a good one would nevertheless, extend the life and the performance of this engine.
Next time do it [link=http://www.rcuniverse.com/forum/Tapered%2DBore_Engine_Break%2Din_%2D_Upgraded/m_1850473/tm.htm]this way[/link].
Your engine is not in my hands, or the issue would have been much easier to diagnose...
But for now, get the right glow-plug, to remove this degree of freedom.