Never use 2-4-C on the gimbal or U-joints, the teflon within makes the rollers (needles) slide rather than roll and the bearing will wear out prematurely. If I were you, I'd use the grease you bought, and pump trwice as much is as you normally would to try and replace all the 2-4-C.

2-4-C is superior to the other grease in every other application though...

Where does that grease go that gets pumped out/replaced? I worry about adding too much grease to the gimbal.

I believe it collects in the bellows area......If you remove the drive for periodic inspection you can then clean out excess grease/lube that has accumulated there.

Ok, so if the 2-4-C is bad because of the Teflon, can I just use regular old grease? Is there something special about the Merc gimble grease?

I had to bring this back up. I pulled my drive tonight to grease the u-joints, came right off. There was plenty of excess grease in the belows, kinda made me nervous at first until I remembered the discussion on where the excess gimbal grease goes.

Anywho, I pulled out my official Mercruiser owners manual, which being close to 20 years old is a bit ragged. It stated to use the 2-4-C on the hinge pins and gimble. It was both spelled out and had a great little diagram showing the grease points, which included the gimble.

I just can't imagine that Merc is going to recomend that I use a grease that will be bad for my drive, and the Alpha has been around plenty long enough for them to know what works on it.

Ok, flame away if you disagree!