ya know what?
i just happen to look at my kids' yerf dog 6.5hp and noticed that it will need a driver and driven unit also.....i did some web surfing and these things aren't as easy to find as they used to be. it an asymetrical series 30 on it and there are only a couple places i found that show them and them suckers ain't cheap any more!!!
if someone finds a good supplier let me know too......