its an OOOOOLD engine. was on my dads styro p51 rtf. like one of the first ones ever. then spent some time on my cub. not im just waitng for the right carb. if i had one id use it on the telemaster instead of the asp. and im a tard. theyre the exact same size. still want a new carb for it tho so if someone finds the right one let me know! greatly appreciated.