I recently purchased a 1985 Hunter 34 with a 3GMF engine and the transmission is Kanzaki KM3-A and the plate (attached pic) says SAE OIL, but when I checked the dipstick the viscosity was very thin and looked like Transmission fluid. There has been no transmission issues, goes into forward and reverse without any delay or issues. What should I do? My concern is am I borrowing trouble to suck out the fluid and replace it with oil? I have no clue how long it has been in there. Any suggestions would be appreciated.
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