this is a bit hard to xplain but here goes... I have an ST pro. it has been about a year since ive used it so finally i decided to break it out. it ran good until now. i opened the throttle and it stopped moving so i let off the throttle but the engine was still "going". i shut it down and restarted it. it was idling and i slowly opened the throttle and it wanted to take off but it wasnt moving. it seems like the throttle gets stuck. i took a look at it and found that the gears were fine( i did the paper-crunch test to make sure it was a tight fit. help would be greatly appreciated. do you think i could have ruined the engine???