So*Cal - we did have a shipment of motors several months ago that would smell a little during the first few heat cycles. I think it was an lubricant burning off inside the motor - I had a 7.5 do that to me.

What motor were you running? Couple things to check - drive train, gear mesh, verify on the right profile (esc -just to be safe). I wouldn't think it would get that hot under normal conditions.