The seal actually grooves the pulley :rolleyes:

It's amazing what a seal will do to alluminum after alot of hours at high R's.

How many hours are on the blower?

I bought it used from a friend, who bought it used from another guy, who bought it used from...

Well, you get the picture. Unknown hours...

Luckily, I have two spare pulleys so I'll just stick one of them on.