Pennzoil 80-90 or Mercury 90

[spareparts]

all the synthetic and semi synthetic gear lube is tinted green, Automotive and regular gear lube is brown tint. Add water to the green stuff and it comes out mint green

[steplift20]

Spareparts it is like a mint green, I changed the base of the water impeller , and I don't think it's ever been changed since 1988 it looked a little funky to me and since I think I am getting water intrusion from the base is only because when I ran the motor I never put the prop below the water line only ran it with ear muffs, also did you ever clean your thermostats? I was thinking I could clean them by putting them in white viniger, what do you think?