Hi there,

I had the same symptoms with my FA82. I use mine to power a Calmato sports turning a 13x6 MA as well. Almost the same engineconfig.

I read that you use filters on your fuel setup. Thats OK but.... I used a filter placed in the fuel line to the carb resulting in somewhat irregular rpms. It seems to change in rpms at full throttle. I got rid of this filter (I tried different kinds and brands) and changed the copper clunk for a viltclunk (a clunk with some kind of fabric wrapped around it... don't know what it is in English).

This gives you the advantage that it draws fuel in the fabric and with that it filters the fuel before going to the carb. The fuel flow is more consistent with this setup. It worked wonders on my FA82.

Something else could be that the fuel line in the tank came loose that could explain the 5 minute flight before engine failure (especially in a loop). I had the same problem with a FA120 that quit on me after 5 or 6 minutes. The fuel tank was empty half way and the fuel came under the brass tube (where the silicon fueltube came off inside the tank) that exits the tank causing the engine to run horrible and then to quit.

Well, there you go.. hope its useful

(my apologies for the poor grammar, I'n not American or English [:-] )

cheers,

Tjen il-vec