HI,
yesterday i fly my new zero g.s with a moki 210.
i do the break in trim the engine and go to the test flight.
as the airplane left the runway that engine have a cut but i landed the plane ok.
when i check the engine i notice that the prop is turning very hard.

i open the engien head to see if everthing is ok and everything is ok.

does anybody know this problem? how can i fix it?

thanks
nir