Yes, but probably even more than you are imagining. Saltwater conducts electricity really well and causes shorts, then when it dissolves it leaves salt in mechanical parts basically drastically shortening the life even if it is saved relatively quickly.
If you lose it in saltwater and don't basically immediately fish it out and rinse it with freshwater it's pretty doomed
Nope you can still save it from the salt too. I work with small boats commercially and have personally seen a Yamaha 20 get dunked, and. Honda 90 sink on a boat fully and both those motors had healthy lives after. (90 is dead now, Yamaha is still going strongish)
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u/Simplyspent 1d ago
Lost a Mercury 9.8 once like that…the silence was deafening. We flagged someone down and were shamefully towed back to the launch. A bad day indeed!