The short answer is "that depends"
How does the belt "blow"...
Check for misalignment between the centers of the driving and driven pulley surfaces. If thats ok, then, assume you're going to need a new pully... however if you're in a consistent salt spray type of area, I would consider taking the pulley to a machine shop and having them cut one out of aluminum.
We are not primarily on earth to see through one another, but to see one another through
Some people are like slinkies: not really good for anything... but you can't help laughing when you push them down the stairs