bow-thruster oil

Randy Kilmon <drifter01us@...>

I am in the process of changing the oil in the bow
thruster of my SM 2000, #240. However, since
performing this maintenance a couple of years ago, I
have forgottgen whether to use 90 weight gear oil, or
plain old 30 or 40 weight motor oil. (I think it's the
Can anyone advise me?
Many thanks,
Randy Kilmon

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