I have an O.S. LA .40 that I last ran ( shortly ) about 10 years ago. Did not know much about engines back then or now ( just picking the hooby back up ), so I didn't really "clean" it out when I was done. I know, I know, I am a newbie. I wento to put it back in a trainer and noticed the the carb is completely stuck shut. The little arm that is attached to it that swivels and connect to the control rod an servo will not move. It is in the closed position. I have occasionally "played" with it and here and there and it opened up and closed very well a few monthes ago. Does anyone have any suggestion on how to get it unstuck. Any help would be greatly appreciate. Thanks.