The plugs are the ones supplied with the engine. They are OS F .They seem to be ok at the sight!!! It's the first thing I have thought of.The strange is that when you run the engine cold, it runs correctly for a while (until it warms up) and in these conditions you can switch the power supply off and everything is ok. When the engine warms up it becomes difficult to accelerate and overall it stops if you switch off the plugs. It's my first radial and this is the reason why I ask to the people that have got it. A question: I'm using the green run mixture, methanol 90%, stynthetic oil 10: That's what the supplier suggest for the first running hour. Is it ok? somebody suggested me to add nithrometane but in the instruction book it is absolutely forbidden until the seventh hour!
Please.....help me!!
I do not know what else doing.