Royal Purple Lubricants

Change the Gear Oil in a Used Stern-Drive

The gear-to-gear mesh in a stern drive or in an outboard lower unit is as hard on a gear oil as you would expect. Shearing breaks down the oil, which means it should be one of the first things you change on a used boat you just bought.

One of the first things I do when I buy a used anything with an internal combustion engine is change the fluids. Engine oil goes first. Then the transmission … [Read more...]



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