Hi Dave !

Thank you very much for your prompt reply.
Yes, my YS .91AC is new, brand new as all the stuff inside the box (4 allen, 1 hex, 1 check valve, manual, Futaba garantee, silencer and the box itself). I get it from a friend. I know it is discontinued for about 5 years. I also get a YS F-120 but this one is used and so I adjust the valves clearance (was close to 0.55 mm), change the gaskets and clean inside the regulator. Could you tell me the output power for both engines ?
Thank you in advance.

IGOS R/C