The engine is still on the test stand. The breakin takes about four hours of run time according to the manual and that seems about right. When new the engine is very tight and needs to be carefully broken in. It started right up but it must stay at a high idle speed to keep running. I have about 3 1/2 hours on it now and it is now running on the flight mix of fuel which is a gallon of standard four cycle fuel mixed with a gallon of methanol. Actually pretty cheap fuel mix.
I'm using a Electro Dynamics glow driver that works really well to light up the seven glow plugs.