I would not. I know that the regular Mercury gear lube is not recommended for the Bravo 3 either. You should use an oil that has the ability to handle some water contamination while still protecting your gears and bearings. I use Amsoil, synthetic marine gear lube. Works great.
http://www.amsoil.com/storefront/agm.aspx
Most of the high horsepower offshore guys are using Amsoil in their drives and report having great luck with it. If you would like to order some, please use my dealer number (1203272) on the website when you check out,
Thanks!!
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