I don't know anything about jets, but I've got an Evinrude 115 prop on my boat, I've had problems in the past with the thermostats sticking shut (it's a costly repair) after I used it in the salt, even though I flushed it with fresh water. Now I use that "Salt Away" product, and I haven't had a problem since. I would highly recommend using Salt Away on any motor used in the salt.

-N.
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