stinger 50 starter

[rcman1]

What do I need to replace when the starter shaft turns but can't turn the motor past compression
New to nitro, bought this off a friend in the Carolina's but I live WA state now

[WayneBrown]

sounds as if the grub screws holding the hex adapter have slipped.
remove, clean thoroughly and reinstall.

[rcman1]

pulled motor and bearing inside the clutch are shot