Where do you have your outboard? Is yours the model with the original inboard with the swing keel?
I could always do what some other Kelt owners have done: hoist the engine out of the water and have it sit on beams straddling the cockpit seats. I will ask the current owner if it's ever been an issue. Also I'm looking at a slip at the mouth of our mighty Fraser River - a little less salinity I would expect.
Here's the listing for those interested:
https://victoria.craigslist.org/boa/d/parksville-sailboat/7048114681.html