Hi Derek, I had the exact same thing happen to me and I was given a Titan pump from a colleague. The same problem with my Gusher - too much corrosion inside to rebuild the pump. The Titan just wouldn't fit so I ended up buying a replacement Gusher on eBay for a good price, Replacement was easy!
-- Ian Matthew "Siento el Viento" C&C 29-1 San Francisco Bay
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