RE: first flight good, second flight BAD.
let me get this straight, all of his engines run one flight fine, then all the engines have the same exact issue on the 2nd flight of the day?
so if you go out on say this coming Sat. and fly, you will get 1 flight in with no issues, and then the next flight is a dud?
and then you can go out the following Sat. and the same scenario repeats?
nothing in the book of laws that i know of can explain this.
but if you are using the same exact fuel and not having issues, then try your fuel in his planes next time.
if that and the glow plugs are fine then he is just unlucky.......NO?