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Old 03-04-2017, 12:41 PM   #1
porman's Avatar
City: Duvall, Wa
Country: USA
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Bow Thruster Gear Oil

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?

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Old 03-04-2017, 03:09 PM   #2
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Last time I filled a thruster gear box we used 90wt gear oil.

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Old 03-04-2017, 03:52 PM   #3
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My Vetus thruster uses 90wt outboard lower unit oil. Its just a simple 90 degree gearbox.
1984 Monk 36 Hull #46
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