acdii

Since I haven't run one up yet, I don't know if vibrations would be an issue. What servos are those running this engine are you using?

kmeyers

I run standard size, analog, nylon gear on all my gas engines.

acdii

So Futaba 3004 should be fine for this?

kmeyers

Yes, that is my most common throttle servo on gas models. I don't remember one ever failing.
I always use a name brand servo with a ball bearing at the top (which the 3004 futaba is).

acdii

Great, I can use the 645MG elsewhere that is more fit for it's use. That gives me a spare one for the parts box. I still need mini or micros for the doors. 17 servos and counting for the B-25!