Most salt resilient Flipsky motor

What Flipsky would you say hold up best in salt water? Do you need to fill half with corrosionX and ceramic bearings? Thinking of 7070 but outrunner maybe have more space for salt to come in?

Would like 3-4kw cont to plane a dinghy

Better take an inrunner, if you use it in saltwater all the time. 70165 seems suitable for a dinghi. Best would be to fill it with thin mineral oil.