This plane has the stock nexstar prop on it (11x5 or 11x6, can't remember). The plug I dumbly put in was a new K&B RC plug. I TOOK OUT an OS3A plug. [&:] When I put back the old plug, things got better. I'll pick up a couple of news ones here soon. BTW this is an FXI engine, if it makes any difference.

Thanks for the help.