Huntar, I also have a Northwest jet and have been thing a lot about this very subject. Have you taken your boat out in the salt?? I hear from others that the most importaint thing is to get the pump washed out with fresh water ASAP. I want to try it out but want to be sure its O.K.. I'll ask about the zinks.

Good post, I have been wondering a lot about this subject, THX doubletake
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Clearwater/Salmon Super Freak