I am helping a friend of mine sort out a 1990 9.9 HP Johnson and up until today everything was going great...until a pull on the rip cord ended with the rope not going back in. I assume the spring broke or maybe a spring retainer failed...any thoughts? We don't have a manual but I guess YouTube may be the next thing for us to look at. If it is a broken recoil spring does anybody have a trick to replace it easier than a manual would suggest? Thanks in advance....Happy Boating!