RE: Cermark F16 what engine?
Quite a few of the F-16 aircraft out there flying with OS91FX power. Nothing at all wrong with that combination.
There are a number of OS/Jett-stream combinations too in both the F-16 and F-18. Excellent combination. 12x7 or 12x8 prop, and you will really enjoy the performance.
Lots of F-16s flying with Jett SJ-90L and SJ-90LX power too.
Bob