Please review thruster condition

Hi, Bluerobotics team. Please review condition of my T200 thruster. Thruster is working perfectly, but I smelled the smell of the burning electronics.
For the past three years, I traveled about 60 miles on the SUP board and was about 100 hours in seawater.

@e-sup What voltage were you running at? The corrosion is cosmetic and shouldn’t affect performance.

I’m running 4S LiPo. Never at 1900 PWM, usually at 1600-1700, sometimes 1800. But it can run up to 4 hours with short pauses.

If it works, then I don’t have further recommendations. It is an unknown why you would be smelling burned electronics.