Bow Thruster Gear Oil

[porman]

I hope one of you lubricant experts can help me. I'm looking for gear oil for my Volvo QL bow thruster. The Volvo product, number 41100129, is no longer available. I've been told that it is the same as Castrol Alpha SP 150. I haven't been able to verify this. Can anyone out there help me find the correct fluid?

 

[Capt.Bill11]

Last time I filled a thruster gear box we used 90wt gear oil.

 

[High Wire]

My Vetus thruster uses 90wt outboard lower unit oil. Its just a simple 90 degree gearbox.